iOS开发中常用的方法（一）

系统弹窗:###

过期方法：

UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"确认报价" message:@"报价不可修改" delegate:nil cancelButtonTitle:@"好的" otherButtonTitles: nil];

// 显示出来
[alertView show];

新方法：

UIAlertController* alter = [UIAlertController alertControllerWithTitle:@"注销账户" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

UIAlertAction* action1 = [UIAlertAction actionWithTitle:@"确认退出" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
      //填写处理逻辑
    }];
UIAlertAction* action2 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
      //填写处理逻辑
    }]; 
[alter addAction:action1];
[alter addAction:action2];

//弹出选择框
[self presentViewController:alter animated:YES completion:nil];

定时器/延时：###

延迟调用方法一:

[self performSelector:@selector(nextQuestion:) withObject:nil afterDelay:2.0];

延迟调用方法二：

 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{  
     //需要调用的方法
     
 });

定时器一：（精确度一般）:

NSTimer *timer = [NSTimer timerWithTimeInterval:2.0 target:self selector:@selector(方法名) userInfo:nil repeats:YES];
NSRunLoop *runLoop = [NSRunLoop mainRunLoop];
[runLoop addTimer:timer forMode:NSRunLoopCommonModes];

定时器二：（精确度高）:

 //1.创建CADisplayLink
    CADisplayLink *link = [CADisplayLink displayLinkWithTarget:self selector:@selector(方法名)];
 //2.添加到运行循环
    [link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

计算控件尺寸：###

- (CGSize)stringSize:(NSString *) string andMaxSize:(CGSize)maxSize andFontNum:(NSInteger)fontNum{
// 最大尺寸    
   NSDictionary *dict = @{NSFontAttributeName : [UIFont systemFontOfSize:fontNum] };       
   CGRect labelFrame =  [string boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil];       
// 获取 size并返回
   return labelFrame.size;
}

通知相关：###

发送通知

    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
    [center postNotificationName:@"OpenButtonNotification" object:nil userInfo:@{@"headerView":self}];

接收通知

    NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
    [center addObserver:self selector:@selector(方法名:) name::@"OpenButtonNotification" object:nil];

注销通知

-(void)dealloc{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

TableView相关：###

自动行高(需要配合autolayout自动布局)

self.tableView.estimatedRowHeight = 200; //预估行高
self.tableView.rowHeight = UITableViewAutomaticDimension;

tableViewCell左滑功能

//tableView向左滑的功能
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{    
   self.tableView.editing = !self.tableView.editing;
   ChangeInfosController* changeInfo = [[ChangeInfosController alloc]init];    
   [self.navigationController pushViewController:changeInfo animated:YES];
}
//修改左滑的文字
-(NSString*)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath{    
    return @"编辑";
}

取消重用

NSString*CellIdentifier = [NSStringstringWithFormat:@"Cell%ld%ld", (long)[indexPath section], (long)[indexPath row]];
//以indexPath来唯一确定cell
FillOrderCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
//出列可重用的cell    if (cell == nil) {        
cell = [[FillOrderCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

CollectionView相关：###

自定义layout的三个步骤(流水布局)：
一、准备数据,并保存到布局对象数组

- (void)prepareLayout{    
    [super prepareLayout];   
 
    //准备item的数据   
    //定义数组用来保存每个item的frame
    NSMutableArray* marr = [NSMutableArray array];

    //给每个item布局    
    for (int i = 0; i < self.clothesInfos.count; i ++)  {        
    //创建布局对象        
    NSIndexPath* indexPath = [NSIndexPath indexPathForRow:i inSection:0];        
    UICollectionViewLayoutAttributes* attr = [UICollectionViewLayoutAttributes layoutAttributesForCellWithIndexPath:indexPath];        
    //取出数据        
    ClothesModel* model = self.clothesInfos[i];
        
    //计算frame
    attr.frame = CGRectMake(itemX, itemY, itemWidth, itemHeight);
       
    //保存数据        
    [marr addObject:attr];

    }
 
    //计算footView的frame
    NSIndexPath* footPath = [NSIndexPath indexPathForRow:0 inSection:0];        
    UICollectionViewLayoutAttributes* footAtt = [UICollectionViewLayoutAttributes layoutAttributesForSupplementaryViewOfKind:UICollectionElementKindSectionFooter withIndexPath:footPath];
    footAtt.frame = CGRectMake(footX, footY, footW, footH);

    [marr addObject:footAtt];     
    // 把数据保存到布局数组    
    self.layoutAttributeMarr = marr;
}

二、计算内容区域

- (CGSize)collectionViewContentSize{    
   CGFloat CVCWidth = [UIScreen mainScreen].bounds.size.width;                    
   UICollectionViewLayoutAttributes* lastAtt = self.layoutAttributeMarr.lastObject;    
   CGFloat CVCHeight = CGRectGetMaxY(lastAtt.frame)+_margin;//根据最大的Y值得到布局内容的高度    
   CGSize CVCSize = CGSizeMake(CVCWidth, CVCHeight);    
   return CVCSize;
}

三、返回布局对象数组

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect
{    
    return self.layoutAttributeMarr;
}

数据存储方式：###

1.writeToFile
写入数据:

//1.1 你需要获取路径
   NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

// .XXX 尾椎 只是决定 以哪中方式查看数据, 对存入的数据本身没有影响    
   NSString *fiflePath = [path stringByAppendingPathComponent:@"data.XXX"];
   
//1.2 写数据
   NSArray *dataArray = @[@"亚洲国际舞王尼古拉斯赵四",@"小明",@"老王",@"霜霜"];       //1.3 存    //atomically 原子性的,数据安全的, 百分之九十九都是YES
   [dataArray writeToFile:fiflePath atomically:YES];

读取数据:

//1.读取路径    
   NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
   NSString *fiflePath = [path stringByAppendingPathComponent:@"data.XXX"];
   
    //2.取出来
   NSArray *dataArray = [NSArray arrayWithContentsOfFile:fiflePath];

2.userDefault(偏好设置)
写入数据:

 //1. 获取系统的偏好设置对象   
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 //2. 存储数据
    [defaults setObject:@"小明" forKey:@"name"];    
    [defaults setInteger:100 forKey:@"age"];    
    [defaults setBool:NO forKey:@"isTrue"];    
 //3.立即同步:  强制写入
    [defaults synchronize];

读取数据:

 //1.获取到偏好设置的路径    
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
 
 //2.读取数据
    NSString *name =  [defaults objectForKey:@"name"];
    NSInteger age = [defaults integerForKey:@"age"];
    BOOL isTrue = [defaults boolForKey:@"isTrue"];

3.归档
写入数据:

//1.文件路径    
    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"data.plist"];       
//1. 有个对象
    CZPserson *p = [[CZPserson alloc]init];
    p.name = @"小明";    
    p.age = 100;    
    p.sex = YES;       
//2.存储  归档    
    [NSKeyedArchiver archiveRootObject:p toFile:filePath];

读取数据:
*注意点: 如果使用归档 **
*1. 该对象必须遵守NSCoding 协议 编码协议 *
*2. 实现 encodeWithCoder方法 *
*3. 实现:initWIthCoder方法 *

    NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"data.plist"];       
//反归档 ,解档
    CZPserson *p = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];

实现协议方法:

- (void)encodeWithCoder:(NSCoder *)aCoder{    
   [aCoder encodeBool:self.sex forKey:@"sex"];    
   [aCoder encodeInteger:self.age forKey:@"age"];
   [aCoder encodeObject:self.name forKey:@"name"];    
}
//反归档只是个过程, 告诉系统你读取的时候,想让别人读取哪些属性
- (instancetype)initWithCoder:(NSCoder *)aDecoder{
    if (self = [super init]) {
        self.name = [aDecoder decodeObjectForKey:@"name"]; 
        self.age  = [aDecoder decodeIntegerForKey:@"age"]; 
        self.sex = [aDecoder decodeBoolForKey:@"sex"];
     }    
     return self;
}

随机色:###

- (UIColor *)randomColor{    
    return [UIColor colorWithRed:((float)arc4random_uniform(256) / 255.0) green:((float)arc4random_uniform(256) / 255.0) blue:((float)arc4random_uniform(256) / 255.0) alpha:1.0];
}    

手势识别：###

UITapGestureRecognizer(点按)
UILongPressGestureRecognizer(长按)
UISwipeGestureRecognizer(轻扫)
UIRotationGestureRecognizer(旋转)
UIPanGestureRecognizer(拖动)
UIPinchGestureRecognizer(捏合，用于缩放)

//1.创建一个手势 并且监听   
 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];       
//最小触发 按压的时间    
 longPress.minimumPressDuration = 2.0;       
//允许多大范围内 触发    
 longPress.allowableMovement =  20;    
//2.添加到当前你想 操作的控件上   
 [self.myImageVIew addGestureRecognizer:longPress];

时间相关：###

获取当前时间:

1.获取当天的日期
    NSDate *date = [NSDate date];
   //2.获取当前日历
    NSCalendar *lendar = [NSCalendar currentCalendar];
    //3.从日历中获取 秒数
    //(NSCalendarUnit)  单位
    NSInteger second = [lendar component:NSCalendarUnitSecond fromDate:date];

2.抓取系统时间
    NSDate* nowDate = [NSDate date];
    NSDateFormatter* formatter = [[NSDateFormatter alloc]init];
    formatter.dateFormat = @"yyyy年MM月dd日HH时mm分ss秒";
    NSString *time = [formatter stringFromDate:nowDate];

判断当前时间

-(BOOL)isToday{      
 NSCalendar *calendar=[NSCalendar currentCalendar];       
NSCalendarUnit unit=NSCalendarUnitYear | NSCalendarUnitMonth |NSCalendarUnitDay;       
NSDateComponents *selfCmps=[calendar components:unit fromDate:self];    
NSDateComponents *nowCmps=[calendar components:unit fromDate:[NSDate date]];          
return selfCmps.year==nowCmps.year    &&selfCmps.month==nowCmps.month    &&selfCmps.day==nowCmps.day;   
}

-(BOOL)isYesterday{    
//生成只有年月日的日期对象    
NSDateFormatter *fmt = [[NSDateFormatter alloc]init];    
fmt.dateFormat=@"yyyy-MM-dd";       
NSString *selfString =[fmt stringFromDate:self];    
NSDate * selfDate=[fmt dateFromString:selfString];       
NSString *nowString=[fmt stringFromDate:[NSDate date]];    
NSDate *nowDate=[fmt dateFromString:nowString];       
//比较差距    
NSCalendar *calendar=[NSCalendar currentCalendar];    
NSCalendarUnit  unit=NSCalendarUnitYear | 
NSCalendarUnitMonth | NSCalendarUnitDay;    
NSDateComponents *cmps=[calendar components:unit fromDate:selfDate toDate:nowDate options:0];       
return  cmps.year==0    && cmps.month==0    && cmps.day==1 ;   
}

-(BOOL)isTomorrow{    
//生成只有年月日的日期对象    
NSDateFormatter *fmr=[[NSDateFormatter alloc]init];    fmr.dateFormat=@"yyyy-MM-dd";       
NSString *selfString=[fmr stringFromDate:self];    
NSDate  * selfDate=[fmr  dateFromString:selfString];       
NSString *nowString=[fmr stringFromDate:[NSDate date]];    
NSDate  *nowDate=[fmr dateFromString:nowString];       
NSCalendar *calendar =[NSCalendar  currentCalendar];       
NSCalendarUnit unit=NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay;    
NSDateComponents *cmps=[calendar  components:unit fromDate:selfDate toDate:nowDate options:0];       
return cmps.year==0    && cmps.month==0
    && cmps.day==-1;  
}

-(BOOL)isThisYeas{    
NSCalendar  *calendar=[NSCalendar currentCalendar];    
NSInteger  selfYear=[calendar component:NSCalendarUnitYear fromDate:self];    
NSInteger nowYear=[calendar component:NSCalendarUnitYear fromDate:[NSDate date]];   
    return selfYear==nowYear;
}

动画：###

1.基础动画:

//基础动画(缩放)
    CABasicAnimation* basic1 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    basic1.toValue = @(0.1);

//基础动画(旋转)
    CABasicAnimation* basic2 = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    basic2.toValue = @(M_PI*2);

2.关键帧动画:

  //创建路径
    UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:self.view.center radius:150 startAngle:0 endAngle:M_PI*2 clockwise:YES];

    CAKeyframeAnimation* key = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    key.path = path.CGPath;

3.转场动画:

//3.添加转场动画
    CATransition *sition = [CATransition animation];
//设置属性
    //样式
    sition.type = kCATransitionMoveIn;
    //方向
    sition.subtype = kCATransitionFromBottom;
//添加动画
    [self.myImageView.layer addAnimation:sition forKey:nil];

4.组动画:

//创建路径
    UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:self.view.center radius:150 startAngle:0 endAngle:M_PI*2 clockwise:YES];
//创建组动画
    CAAnimationGroup* group = [CAAnimationGroup animation];

    //创建动画1,关键帧动画
    CAKeyframeAnimation* key = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    key.path = path.CGPath;

    //创建动画2,基础动画(缩放)
    CABasicAnimation* basic1 = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    basic1.toValue = @(0.1);

    //创建动画3,基础动画(旋转)
    CABasicAnimation* basic2 = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    basic2.toValue = @(M_PI*2);

    //设置组动画
    group.animations = @[key,basic1,basic2];
    group.duration = 2.0;
    group.repeatCount = 10;

   [self.myLayer addAnimation:group forKey:nil];

NavigationController相关：###

设置导航栏外观

    NSDictionary *dict = @{                           
NSFontAttributeName:[UIFont systemFontOfSize:16], 
                     NSForegroundColorAttributeName:[UIColor whiteColor]                          
                      };   
    [self.navigationBar setTitleTextAttributes:dict];       
// 修改导航栏上的item的外观
    [self.navigationBar setTintColor:[UIColor whiteColor]];

跳转隐藏tabBar

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{       
// 1.隐藏tabbar    
   viewController.hidesBottomBarWhenPushed = YES;       
// 2.调用父类方法执行跳转    
   [super pushViewController:viewController animated:YES];
}

设置状态栏

- (UIStatusBarStyle)preferredStatusBarStyle{
   
    return UIStatusBarStyleLightContent;
}

加载本地的html###

// 创建一个url
//     NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
    
    NSURL *url = [[NSBundle mainBundle]       URLForResource:self.help.html withExtension:nil];       
// 创建一个请求对象    
    NSURLRequest *request = [NSURLRequest requestWithURL:url];       
// 使用webView加载请求对象
    [webView loadRequest:request];

// 开始加载
 - (void)webViewDidStartLoad:(UIWebView *)webView{
       NSLog(@"开始加载");}

// 加载结束时执行Javascript代码
- (void)webViewDidFinishLoad:(UIWebView *)webView{       
// 需要执行的JavaScript代码    
    NSString *jsCode = [NSString    stringWithFormat:@"window.location.href = '#%@'",self.help.ID]; 
// webView执行js代码   
    [webView stringByEvaluatingJavaScriptFromString:jsCode];
}

字符串转对象###

// 获取accessoryType    
NSString *accessoryType = item[@"accessoryType"]; //UIImageView    
// 根据字符串创建类    
Class class = NSClassFromString(accessoryType);    
// 根据类实例化对象    
UIView *accessoryView = [[class alloc] init];    
// 判断是否是UIImageView    
if ([accessoryView isKindOfClass:[UIImageView class]]) {        
// 强转成UIImageView        
UIImageView *imgView = (UIImageView *)accessoryView;        
// 设置ImgView的图片        
imgView.image = [UIImage imageNamed:@"arrow_right"];        
// 自适应大小        
[imgView sizeToFit];

拨打电话:###

//1.获取APP 对象
    UIApplication *app = [UIApplication sharedApplication];
    //2.打电话
    NSURL *url = [NSURL URLWithString:@"tel://1234567890"];
    [app openURL:url];

//简写:
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://1234567890"]];

应用程序之间跳转###

NSURL *URL = [NSURL URLWithString:@"appB://ios.myapp.cn"];   
[[UIApplication sharedApplication] openURL:URL];

裁剪图片###

//1.裁剪区域
    CGRect rect = CGRectMake(x, y, w, h);       
// 2.调用系统的裁剪方法裁剪图片    
/*        参数:        1.被裁剪的大图 CG类型        2.需要裁剪的区域     */    
    CGImageRef imageRef = CGImageCreateWithImageInRect(image.CGImage, rect);       
// 转换成UIImage    
    UIImage *img = [UIImage imageWithCGImage:imageRef];       
// 释放imageRef
    CGImageRelease(imageRef);

传递事件,判断当前点是否在一个区域内###

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event{       
// 1.描述一下按钮上部分的区域       
  CGRect rect = CGRectMake(0, 0, self.bounds.size.width, 100);       
// 2.判断当前点击的点在不在上部分(如果不在,就直接返回nil)    
  if (!CGRectContainsPoint(rect, point)) {               
    return nil;    
  }       
// 3.继续传递事件    
  return [super hitTest:point withEvent:event];
}

从网络获取图片###

    NSURL* url = [NSURL URLWithString:@"http://d.hiphotos.baidu.com/image/h%3D200/sign=c36bc6f3d32a28345ca6310b6bb4c92e/91ef76c6a7efce1b3e241e24a851f3deb58f65d5.jpg"];    
    NSData* data = [NSData dataWithContentsOfURL:url];
    UIImage* image = [UIImage imageWithData:data];

开启子线程###

第一种方法

NSThread *thread1 = [[NSThread alloc]initWithTarget:self selector:@selector(buyTickets) object:nil];    
//设置名称    
thread1.name = @"1111";    
//设置优先级    
thread1.threadPriority = 0.3;
[thread1s start];

第二种方法

   [NSThread detachNewThreadSelector:@selector(buyTickets) toTarget:self withObject:nil];

第三种方法

   [self performSelectorInBackground:@selector(buyTickets) withObject:nil];

url中文和特殊字符转码###

- (NSString *)generateUrl:(NSString *)url{       
/**     第一个参数:NULL     第二个参数:C语言的字符串     第三个参数:NULL     第四个参数:要转义的字符串,不要乱转     第五个参数:编码     */   
NSString *encodedString = (__bridge_transfer NSString *)CFURLCreateStringByAddingPercentEscapes(
NULL,(__bridge CFStringRef)url,NULL,CFSTR("+"),CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));    

   return encodedString;
}

数据加密###

base64加密#####

加密

- (NSString *)base64Encode:(NSString *)originalString{          
//1.将originalString转成二进制    
NSData *data =  [originalString dataUsingEncoding:NSUTF8StringEncoding];       
//2.需要将二进制转成Base64加密之后的字符串    
return [data base64EncodedStringWithOptions:0];
}

解密

- (NSString *)base64Decode:(NSString *)base64String{       
//1.Base64加密之后的字符串转成 NSData    
NSData *data = [[NSData alloc] initWithBase64EncodedString:base64String options:0];       
//2.将二进制转在字符串    
NSString *originalString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];       
return originalString;
}

钥匙串#####

//设置钥匙串
    self.bundleId = [NSBundle mainBundle].bundleIdentifier;
    NSString* value = [SSKeychain passwordForService:self.bundleId account:@"password"];
//保存密码到钥匙串
    [SSKeychain setPassword:password forService:self.bundleId account:@"password"];

MD5/SHA#####

//散列函数
- (NSString *)md5String {
    const char *str = self.UTF8String;
    uint8_t buffer[CC_MD5_DIGEST_LENGTH];
    
    CC_MD5(str, (CC_LONG)strlen(str), buffer);
    
    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];
}

- (NSString *)sha1String {
    const char *str = self.UTF8String;
    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];
    
    CC_SHA1(str, (CC_LONG)strlen(str), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];
}

- (NSString *)sha256String {
    const char *str = self.UTF8String;
    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];
    
    CC_SHA256(str, (CC_LONG)strlen(str), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];
}

- (NSString *)sha512String {
    const char *str = self.UTF8String;
    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];
    
    CC_SHA512(str, (CC_LONG)strlen(str), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];
}

#pragma mark - HMAC 散列函数
- (NSString *)hmacMD5StringWithKey:(NSString *)key {
    const char *keyData = key.UTF8String;
    const char *strData = self.UTF8String;
    uint8_t buffer[CC_MD5_DIGEST_LENGTH];
    
    CCHmac(kCCHmacAlgMD5, keyData, strlen(keyData), strData, strlen(strData), buffer);
    
    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];
}

- (NSString *)hmacSHA1StringWithKey:(NSString *)key {
    const char *keyData = key.UTF8String;
    const char *strData = self.UTF8String;
    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];
    
    CCHmac(kCCHmacAlgSHA1, keyData, strlen(keyData), strData, strlen(strData), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];
}

- (NSString *)hmacSHA256StringWithKey:(NSString *)key {
    const char *keyData = key.UTF8String;
    const char *strData = self.UTF8String;
    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];
    
    CCHmac(kCCHmacAlgSHA256, keyData, strlen(keyData), strData, strlen(strData), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];
}

- (NSString *)hmacSHA512StringWithKey:(NSString *)key {
    const char *keyData = key.UTF8String;
    const char *strData = self.UTF8String;
    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];
    
    CCHmac(kCCHmacAlgSHA512, keyData, strlen(keyData), strData, strlen(strData), buffer);
    
    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];
}

#pragma mark - 文件散列函数

#define FileHashDefaultChunkSizeForReadingData 4096

- (NSString *)fileMD5Hash {
    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];
    if (fp == nil) {
        return nil;
    }
    
    CC_MD5_CTX hashCtx;
    CC_MD5_Init(&hashCtx);
    
    while (YES) {
        @autoreleasepool {
            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];
            
            CC_MD5_Update(&hashCtx, data.bytes, (CC_LONG)data.length);
            
            if (data.length == 0) {
                break;
            }
        }
    }
    [fp closeFile];
    
    uint8_t buffer[CC_MD5_DIGEST_LENGTH];
    CC_MD5_Final(buffer, &hashCtx);
    
    return [self stringFromBytes:buffer length:CC_MD5_DIGEST_LENGTH];
}

- (NSString *)fileSHA1Hash {
    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];
    if (fp == nil) {
        return nil;
    }
    
    CC_SHA1_CTX hashCtx;
    CC_SHA1_Init(&hashCtx);
    
    while (YES) {
        @autoreleasepool {
            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];
            
            CC_SHA1_Update(&hashCtx, data.bytes, (CC_LONG)data.length);
            
            if (data.length == 0) {
                break;
            }
        }
    }
    [fp closeFile];
    
    uint8_t buffer[CC_SHA1_DIGEST_LENGTH];
    CC_SHA1_Final(buffer, &hashCtx);
    
    return [self stringFromBytes:buffer length:CC_SHA1_DIGEST_LENGTH];
}

- (NSString *)fileSHA256Hash {
    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];
    if (fp == nil) {
        return nil;
    }
    
    CC_SHA256_CTX hashCtx;
    CC_SHA256_Init(&hashCtx);
    
    while (YES) {
        @autoreleasepool {
            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];
            
            CC_SHA256_Update(&hashCtx, data.bytes, (CC_LONG)data.length);
            
            if (data.length == 0) {
                break;
            }
        }
    }
    [fp closeFile];
    
    uint8_t buffer[CC_SHA256_DIGEST_LENGTH];
    CC_SHA256_Final(buffer, &hashCtx);
    
    return [self stringFromBytes:buffer length:CC_SHA256_DIGEST_LENGTH];
}

- (NSString *)fileSHA512Hash {
    NSFileHandle *fp = [NSFileHandle fileHandleForReadingAtPath:self];
    if (fp == nil) {
        return nil;
    }
    
    CC_SHA512_CTX hashCtx;
    CC_SHA512_Init(&hashCtx);
    
    while (YES) {
        @autoreleasepool {
            NSData *data = [fp readDataOfLength:FileHashDefaultChunkSizeForReadingData];
            
            CC_SHA512_Update(&hashCtx, data.bytes, (CC_LONG)data.length);
            
            if (data.length == 0) {
                break;
            }
        }
    }
    [fp closeFile];
    
    uint8_t buffer[CC_SHA512_DIGEST_LENGTH];
    CC_SHA512_Final(buffer, &hashCtx);
    
    return [self stringFromBytes:buffer length:CC_SHA512_DIGEST_LENGTH];
}

#pragma mark - 助手方法
/**
 *  返回二进制 Bytes 流的字符串表示形式
 *
 *  @param bytes  二进制 Bytes 数组
 *  @param length 数组长度
 *
 *  @return 字符串表示形式
 */
- (NSString *)stringFromBytes:(uint8_t *)bytes length:(int)length {
    NSMutableString *strM = [NSMutableString string];
    
    for (int i = 0; i < length; i++) {
        [strM appendFormat:@"%02x", bytes[i]];
    }
    
    return [strM copy];
}

解压缩文件###

//下载完毕解压到当前文件夹
    [SSZipArchive unzipFileAtPath:location.path toDestination:self.destinationPath uniqueId:nil];

数组排序###

    [marr sortUsingComparator:^NSComparisonResult(NewsModel* order1, NewsModel* order2) {  
    
               if ([order1.totalPrice floatValue] > [order2.totalPrice floatValue]) {
                    return (NSComparisonResult)NSOrderedDescending;
                }
               
                if ([order1.totalPrice floatValue] < [order2.totalPrice floatValue]) {
                    return (NSComparisonResult)NSOrderedAscending;
                }

                return (NSComparisonResult)NSOrderedSame;
 }];

数组倒序###

    NSArray* arr = [[ordersMarr reverseObjectEnumerator] allObjects];

NSArray 快速求总和、最大值、最小值、平均值###

- (void)caculateArray:(NSArray *)array{ 
CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] floatValue]; 
CGFloat avg = [[array valueForKeyPath:@"@avg.floatValue"] floatValue]; 
CGFloat max =[[array valueForKeyPath:@"@max.floatValue"] floatValue]; 
CGFloat min =[[array valueForKeyPath:@"@min.floatValue"] floatValue]; 
NSLog(@"%fn%fn%fn%f",sum,avg,max,min); return [NSString stringWithFormat:@"%f",sum]; 
}

字符串排序分组###

将字符串数组按照元素首字母顺序进行排序分组

+ (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{    
     if (array.count == 0) 
     {        
        return nil;    
     }    
     for (id obj in array) {        
          if (![obj isKindOfClass:[NSString class]]) 
          {            
            return nil;        
          }    
     }    
   UILocalizedIndexedCollation *indexedCollation = [UILocalizedInd  exedCollation currentCollation];    
   NSMutableArray *objects = [NSMutableArray arrayWithCapacity:indexedCollation.sectionTitles.count];    
//创建27个分组数组    
   for (int i = 0; i < indexedCollation.sectionTitles.count; i++) {        
      NSMutableArray *obj = [NSMutableArray array];        
      [objects addObject:obj];    
   }    
   NSMutableArray *keys = [NSMutableArray arrayWithCapacity:objects.count];    
//按字母顺序进行分组    
   NSInteger lastIndex = -1;    
   for (int i = 0; i < array.count; i++) {        
     NSInteger index = [indexedCollation sectionForObject:array[i] collationStringSelector:@selector(uppercaseString)];        
     [[objects objectAtIndex:index] addObject:array[i]];        
     lastIndex = index;    
   }    
//去掉空数组    
   for (int i = 0; i < objects.count; i++) {        
     NSMutableArray *obj = objects[i];        
     if (obj.count == 0) {            
        [objects removeObject:obj];        
     }    
   }    
//获取索引字母    
   for (NSMutableArray *obj in objects) {        
      NSString *str = obj[0];        
      NSString *key = [self firstCharacterWithString:str];        
      [keys addObject:key];    
   }    
   NSMutableDictionary *dic = [NSMutableDictionary dictionary];    
   [dic setObject:objects forKey:keys];    
   return dic;
}

计算磁盘大小###

1.磁盘总空间大小

+ (CGFloat)diskOfAllSizeMBytes{    
 CGFloat size = 0.0;    
 NSError *error;    
 NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];    
   if (error) {
     #ifdef DEBUG        
     NSLog(@"error: %@", error.localizedDescription);
     #endif    
   }else{        
     NSNumber *number = [dic objectForKey:NSFileSystemSize];        
     size = [number floatValue]/1024/1024;    
   }    
 return size;
}

2.磁盘可用空间大小

+ (CGFloat)diskOfFreeSizeMBytes{    
 CGFloat size = 0.0;    
 NSError *error;    
 NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];     
   if (error) {
     #ifdef DEBUG        
     NSLog(@"error: %@", error.localizedDescription);
     #endif    
   }else{        
     NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];        
     size = [number floatValue]/1024/1024;    
   }    
 return size;
}

相册选择多文件(ZLPhotos)###

 //进入相册    
ZLPhotoPickerViewController* imgPickerController = [[ZLPhotoPickerViewController alloc]init];    
imgPickerController.status = PickerViewShowStatusSavePhotos;    
imgPickerController.maxCount = 3;    //设置最大可选择数
[self presentViewController:imgPickerController animated:YES completion:nil];
    
//block传值
__weak typeof(self) weakSelf = self;
imgPickerController.callBack = ^(NSArray *assets){               
    for (ZLPhotoAssets *photoAsset in assets) {                       
     UIImage *image = photoAsset.originImage;                       
     NSData *imageData   =UIImagePNGRepresentation(image);                       
//随机生成的文件名称            
     NSString *fileName = [NSString stringWithFormat:@"%d.png",arc4random_uniform(100)];                       //将每次获取到的图片,加入到字典中
     [weakSelf.fileDict setObject:imageData forKey:fileName];
    }
};

图片处理###

对图片进行滤镜处理

// 怀旧 --> CIPhotoEffectInstant                         
单色 --> CIPhotoEffectMono
// 黑白 --> CIPhotoEffectNoir                            
褪色 --> CIPhotoEffectFade
// 色调 --> CIPhotoEffectTonal                           
冲印 --> CIPhotoEffectProcess
// 岁月 --> CIPhotoEffectTransfer                        
铬黄 --> CIPhotoEffectChrome
// CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{    
CIContext *context = [CIContext contextWithOptions:nil];    
CIImage *inputImage = [[CIImage alloc] initWithImage:image];    
CIFilter *filter = [CIFilter filterWithName:name];    
[filter setValue:inputImage forKey:kCIInputImageKey];    
CIImage *result = [filter valueForKey:kCIOutputImageKey];    
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];    
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];    
CGImageRelease(cgImage);    
return resultImage;
}

对图片进行模糊处理

// CIGaussianBlur ---> 高斯模糊
// CIBoxBlur      ---> 均值模糊(Available in iOS 9.0 and later)
// CIDiscBlur     ---> 环形卷积模糊(Available in iOS 9.0 and later)
// CIMedianFilter ---> 中值模糊, 用于消除图像噪点, 无需设置radius(Available in iOS 9.0 and later)
// CIMotionBlur   ---> 运动模糊, 用于模拟相机移动拍摄时的扫尾效果(Available in iOS 9.0 and later)
+ (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{    
CIContext *context = [CIContext contextWithOptions:nil];    
CIImage *inputImage = [[CIImage alloc] initWithImage:image];    
CIFilter *filter;    
   if (name.length != 0) {        
     filter = [CIFilter filterWithName:name];        
     [filter setValue:inputImage forKey:kCIInputImageKey];        
     if (![name isEqualToString:@"CIMedianFilter"]) {            
       [filter setValue:@(radius) forKey:@"inputRadius"];       
     }        
   CIImage *result = [filter valueForKey:kCIOutputImageKey];        
   CGImageRef cgImage = [context createCGImage:result fromRect:  [result extent]];        
   UIImage *resultImage = [UIImage imageWithCGImage:cgImage];    
   CGImageRelease(cgImage);        
   return resultImage;    
   } else {        
     return nil;    
   }
}

毛玻璃效果

//Avilable in iOS 8.0 and later
+ (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame{    
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];    
UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];    
effectView.frame = frame;    
return effectView;
}

给image设置尺寸(缩放图片)

- (UIImage *)imageByScalingToSize:(CGSize)targetSize{    
UIImage *sourceImage = self;    
UIImage *newImage = nil;    
CGSize imageSize = sourceImage.size;    
CGFloat width = imageSize.width;    
CGFloat height = imageSize.height;    
CGFloat targetWidth = targetSize.width;    
CGFloat targetHeight = targetSize.height;    
CGFloat scaleFactor = 0.0;    
CGFloat scaledWidth = targetWidth;    
CGFloat scaledHeight = targetHeight;    
CGPoint thumbnailPoint = CGPointMake(0.0,0.0);    
if (CGSizeEqualToSize(imageSize, targetSize) ==NO) {        CGFloat widthFactor = targetWidth / width;        
CGFloat heightFactor = targetHeight / height;        
if (widthFactor < heightFactor)            
scaleFactor = widthFactor;        
else            
scaleFactor = heightFactor;        
scaledWidth  = width * scaleFactor;        
scaledHeight = height * scaleFactor;               
if (widthFactor < heightFactor) {                      
 thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;       
 } else if (widthFactor > heightFactor) {           
 thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;       
 }    
}      
UIGraphicsBeginImageContext(targetSize);    
CGRect thumbnailRect = CGRectZero;    
thumbnailRect.origin = thumbnailPoint;    
thumbnailRect.size.width  = scaledWidth;    
thumbnailRect.size.height = scaledHeight;    
[sourceImage drawInRect:thumbnailRect];    
newImage =UIGraphicsGetImageFromCurrentImageContext();    
UIGraphicsEndImageContext();    
if(newImage == nil)        
NSLog(@"could not scale image");    
return newImage ;
}

设置Label的行间距

+ (void)setLineSpaceWithString:(UILabel *)label{       
NSMutableAttributedString *attributedString =    [[NSMutableAttributedString alloc] initWithString:label.text];    
NSMutableParagraphStyle *paragraphStyle =  [[NSMutableParagraphStyle alloc] init];    
[paragraphStyle setLineSpacing:3];       
//调整行间距    
[attributedString addAttribute:NSParagraphStyleAttributeName  value:paragraphStyle                             range:NSMakeRange(0, [label.text length])];    
label.attributedText = attributedString;
}

设置Label里的字符有不同的颜色

//可根据自己的需求进行增删改
- (void)stringColorSet {    
NSString*string = @"如何使得Label里的字符有不同的颜色？";    
NSRange range = [string rangeOfString: @"Label"];    
NSMutableAttributedString*attribute = [[NSMutableAttributedString alloc] initWithString: string];    
[attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor redColor]}range: range];    
[attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor greenColor]}range: NSMakeRange(0, range.location)];    
[attribute addAttributes: @{NSForegroundColorAttributeName: [UIColor cyanColor]}range: NSMakeRange(range.location+ range.length, 5)];    
UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0.0f, 100.0f, 320.0f, 100.0f)];    
[label setText: string];    
[label setAttributedText: attribute];}

设置label显示多行文字

let lab = UILabel()        
let title = "马上登陆\n\n开启我的奇妙之旅~"               
//富文本单独设置后面的名称        
let attr = NSMutableAttributedString(string: title)        
//获取名字范围        
let range = (title as NSString).rangeOfString("开启我的奇妙之旅~")        
//单独设置制定范围的字符串        
attr.addAttributes([NSForegroundColorAttributeName : UIColor.lightGrayColor(),NSFontAttributeName : UIFont.systemFontOfSize(12)], range: range)               
//赋值        
lab.attributedText = attire               
//设置换行        
lab.numberOfLines = 0        
//设置文字大小       
 lab.font = UIFont.systemFontOfSize(14)        
//文字颜色        
lab.textColor = UIColor.grayColor()        
//文字居中        
lab.textAlignment = .Center   

信息验证###

判断手机号码格式是否正确，利用正则表达式验证

+ (BOOL)isMobileNumber:(NSString *)mobileNum{ 
    if (mobileNum.length != 11) { 
    return NO; 
    } 
/** * 手机号码:
 * 13[0-9], 14[5,7], 15[0, 1, 2, 3, 5, 6, 7, 8, 9], 17[6, 7, 8], 18[0-9], 170[0-9] 
* 移动号段: 
134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 
* 联通号段: 130,131,132,155,156,185,186,145,176,1709 
* 电信号段: 133,153,180,181,189,177,1700 *
/ NSString *MOBILE = @"^1(3[0-9]|4[57]|5[0-35-9]|8[0-9]|70)\d{8}$"; 
/**
 * 中国移动：China Mobile * 134,135,136,137,138,139,150,151,152,157,158,159,182,183,184,187,188,147,178,1705 */ 
NSString *CM = @"(^1(3[4-9]|4[7]|5[0-27-9]|7[8]|8[2-478])\d{8}$)|(^1705\d{7}$)"; 
/** * 中国联通：China Unicom * 130,131,132,155,156,185,186,145,176,1709 */ 
NSString *CU = @"(^1(3[0-2]|4[5]|5[56]|7[6]|8[56])\d{8}$)|(^1709\d{7}$)"; 
/** 
* 中国电信：China Telecom * 133,153,180,181,189,177,1700 */ NSString *CT = @"(^1(33|53|77|8[019])\d{8}$)|(^1700\d{7}$)"; 
NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE]; 
NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM]; 
NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU]; 
NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT]; 
 if (([regextestmobile evaluateWithObject:mobileNum] == YES) || ([regextestcm evaluateWithObject:mobileNum] == YES) || ([regextestct evaluateWithObject:mobileNum] == YES) || ([regextestcu evaluateWithObject:mobileNum] == YES)) 
     { 
       return YES; 
     } else { 
       return NO; 
     }
}

2. 判断邮箱格式是否正确，利用正则表达式验证

+ (BOOL)isAvailableEmail:(NSString *)email{ 
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}"; 
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; 
return [emailTest evaluateWithObject:email];
}

3. 判断字符串中是否含有空格

+ (BOOL)isHaveSpaceInString:(NSString *)string{ 
NSRange _range = [string rangeOfString:@" "]; 
if (_range.location != NSNotFound) { 
    return YES; 
   }else { 
    return NO; 
   }
}

4. 判断字符串中是否含有中文

+ (BOOL)isHaveChineseInString:(NSString *)string{ 
  for(NSInteger i = 0; i < [string length]; i++){ 
  int a = [string characterAtIndex:i]; 
    if (a > 0x4e00 && a < 0x9fff) { 
      return YES; 
    } 
  } 
  return NO;
}

判断身份证格式

+ (BOOL)checkIdentityCardNo:(NSString*)value {
    value = [value stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    NSInteger length =0;
    if (!value) {
        return NO;
    }else {
        length = value.length;
        if (length !=15 && length !=18) {
            return NO;
        }
    }
    // 省份代码
    NSArray *areasArray =@[@"11",@"12", @"13",@"14", @"15",@"21", @"22",@"23", @"31",@"32", @"33",@"34", @"35",@"36", @"37",@"41", @"42",@"43", @"44",@"45", @"46",@"50", @"51",@"52", @"53",@"54", @"61",@"62", @"63",@"64", @"65",@"71", @"81",@"82", @"91"];
    NSString *valueStart2 = [value substringToIndex:2];
    BOOL areaFlag =NO;
    for (NSString *areaCode in areasArray) {
        if ([areaCode isEqualToString:valueStart2]) {
            areaFlag =YES;
            break;
        }
    }
    if (!areaFlag) {
        return false;
    }
    NSRegularExpression *regularExpression;
    NSUInteger numberofMatch;
    NSInteger year =0;
    switch (length) {
        case 15:
            year = [[value substringWithRange:NSMakeRange(6,2)] integerValue] +1900;
            if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {
                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}$"
                                                                      options:NSRegularExpressionCaseInsensitive
                                                                        error:nil];//测试出生日期的合法性
            }else {
                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}$"
                                                                      options:NSRegularExpressionCaseInsensitive
                                                                        error:nil];//测试出生日期的合法性
            }
            numberofMatch = [regularExpression numberOfMatchesInString:value                                                options:NSMatchingReportProgress
                          range:NSMakeRange(0, value.length)];
            if(numberofMatch >0) {
                return YES;
            }else {
                return NO;
            }
        case 18:
            year = [value substringWithRange:NSMakeRange(6,4)].intValue;
            if (year %4 ==0 || (year 0 ==0 && year %4 ==0)) {
                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|[1-2][0-9]))[0-9]{3}[0-9Xx]$"
options:NSRegularExpressionCaseInsensitive                                                                    error:nil];//测试出生日期的合法性
            }else {
                regularExpression = [[NSRegularExpression alloc]initWithPattern:@"^[1-9][0-9]{5}19[0-9]{2}((01|03|05|07|08|10|12)(0[1-9]|[1-2][0-9]|3[0-1])|(04|06|09|11)(0[1-9]|[1-2][0-9]|30)|02(0[1-9]|1[0-9]|2[0-8]))[0-9]{3}[0-9Xx]$"                                                                      options:NSRegularExpressionCaseInsensitive                                                                    error:nil];//测试出生日期的合法性
            }
            numberofMatch = [regularExpression numberOfMatchesInString:value                                                options:NSMatchingReportProgress                                                    range:NSMakeRange(0, value.length)];
            if(numberofMatch >0) {
                int S = ([value substringWithRange:NSMakeRange(0,1)].intValue + [value substringWithRange:NSMakeRange(10,1)].intValue) *7 + ([value substringWithRange:NSMakeRange(1,1)].intValue + [value substringWithRange:NSMakeRange(11,1)].intValue) *9 + ([value substringWithRange:NSMakeRange(2,1)].intValue + [value substringWithRange:NSMakeRange(12,1)].intValue) *10 + ([value substringWithRange:NSMakeRange(3,1)].intValue + [value substringWithRange:NSMakeRange(13,1)].intValue) *5 + ([value substringWithRange:NSMakeRange(4,1)].intValue + [value substringWithRange:NSMakeRange(14,1)].intValue) *8 + ([value substringWithRange:NSMakeRange(5,1)].intValue + [value substringWithRange:NSMakeRange(15,1)].intValue) *4 + ([value substringWithRange:NSMakeRange(6,1)].intValue + [value substringWithRange:NSMakeRange(16,1)].intValue) *2 + [value substringWithRange:NSMakeRange(7,1)].intValue *1 + [value substringWithRange:NSMakeRange(8,1)].intValue *6 + [value substringWithRange:NSMakeRange(9,1)].intValue *3;
                int Y = S ;
                NSString *M =@"F";
                NSString *JYM =@"10X98765432";
                M = [JYM substringWithRange:NSMakeRange(Y,1)];// 判断校验位
                if ([M isEqualToString:[value substringWithRange:NSMakeRange(17,1)]]) {
                    return YES;// 检测ID的校验位
                }else {
                    return NO;
                }
            }else {
                return NO;
            }
        default:
            return false;
    }
}

常用函数:###

rand() ----随机数
abs() / labs() ----整数绝对值
fabs() / fabsf() / fabsl() ----浮点数绝对值
floor() / floorf() / floorl() ----向下取整
ceil() / ceilf() / ceill() ----向上取整
round() / roundf() / roundl() ----四舍五入
sqrt() / sqrtf() / sqrtl() ----求平方根
fmax() / fmaxf() / fmaxl() ----求最大值
fmin() / fminf() / fminl() ----求最小值
hypot() / hypotf() / hypotl() ----求直角三角形斜边的长度
fmod() / fmodf() / fmodl() ----求两数整除后的余数
modf() / modff() / modfl() ----浮点数分解为整数和小数
frexp() / frexpf() / frexpl() ----浮点数分解尾数和二为底的指数
sin() / sinf() / sinl() ----求正弦值
sinh() / sinhf() / sinhl() ----求双曲正弦值
cos() / cosf() / cosl() ----求余弦值
cosh() / coshf() / coshl() ----求双曲余弦值
tan() / tanf() / tanl() ----求正切值
tanh() / tanhf() / tanhl() ----求双曲正切值
asin() / asinf() / asinl() ----求反正弦值
asinh() / asinhf() / asinhl() ----求反双曲正弦值
acos() / acosf() / acosl() ----求反余弦值
acosh() / acoshf() / acoshl() ----求反双曲余弦值
atan() / atanf() / atanl() ----求反正切值
atan2() / atan2f() / atan2l() ----求坐标值的反正切值
atanh() / atanhf() / atanhl() ----求反双曲正切值

判断手势方向

 CGPoint translation = [scrollView.panGestureRecognizer translationInView:scrollView.superview];    
 if (translation.y>0) {       
        
  //        NSLog(@"----------下-----------");   
     
 }else if(translation.y<0){               
  //        NSLog(@"----------上-----------");
 }

获取路径下文件大小

- (unsigned long long)fileSizes{    
// 获得文件管理者    
NSFileManager *mgr = [NSFileManager defaultManager];       
// 是否为文件夹    
BOOL isDirectory = NO;       
// 先判断路径的存在性    
BOOL exists = [mgr fileExistsAtPath:self isDirectory:&isDirectory];    
// 路径不存在    
if (!exists) return 0;       
// 如果是文件夹    
if (isDirectory) {        
// 文件总大小        
unsigned long long fileSize = 0;               
// 遍历所有文件        
NSDirectoryEnumerator *enumerator = [mgr enumeratorAtPath:self];        
for (NSString *subpath in enumerator) {            
// 完整的子路径            
NSString *fullSubpath = [self stringByAppendingPathComponent:subpath];            
fileSize += [mgr attributesOfItemAtPath:fullSubpath error:nil].fileSize;        
}               
return fileSize;    
}       
// 如果是文件    
return [mgr attributesOfItemAtPath:self error:nil].fileSize;
}

获取设备型号

+ (NSString *)platform{    
size_t size;       
sysctlbyname("hw.machine", NULL, &size, NULL, 0);    
char *machine = malloc(size);    
sysctlbyname("hw.machine", machine, &size, NULL, 0);    
NSString *platform = [NSString stringWithCString:machine encoding:NSUTF8StringEncoding];    
free(machine);       
if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";    
if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";    
if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";    
if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4 (GSM)";    
if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";    
if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";    
if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5 (GSM)";    
if ([platform isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (GSM+CDMA)";    
if ([platform isEqualToString:@"iPhone5,3"])    return @"iPhone 5c (GSM)";    
if ([platform isEqualToString:@"iPhone5,4"])    return @"iPhone 5c (GSM+CDMA)";    
if ([platform isEqualToString:@"iPhone6,1"])    return @"iPhone 5s (GSM)";    
if ([platform isEqualToString:@"iPhone6,2"])    return @"iPhone 5s (GSM+CDMA)";    
if ([platform isEqualToString:@"iPhone7,1"])    return @"iPhone 6Plus GSM";    
if ([platform isEqualToString:@"iPhone7,2"])    return @"iPhone 6 GSM+CDMA";    
if ([platform isEqualToString:@"iPhone8,1"])    return @"iPhone 6s GSM";    
if ([platform isEqualToString:@"iPhone8,2"])    return @"iPhone 6s Plus Global";    
if ([platform isEqualToString:@"iPhone8,4"])    return @"iPhone SE";    
if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";    
if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";    
if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";    
if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";    
if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";    
if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";    
if ([platform isEqualToString:@"iPad2,4"])      return @"iPad 2 (WiFi)";    
if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini (WiFi)";    
if ([platform isEqualToString:@"iPad2,6"])      return @"iPad Mini (GSM)";    
if ([platform isEqualToString:@"iPad2,7"])      return @"iPad Mini (GSM+CDMA)";    
if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 (WiFi)";    
if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM+CDMA)";    
if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3 (GSM)";    
if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4 (WiFi)";    
if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 4 (GSM)";    
if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 4 (GSM+CDMA)";    
if ([platform isEqualToString:@"iPad4,1"])      return @"iPad Air (WiFi)";    
if ([platform isEqualToString:@"iPad4,2"])      return @"iPad Air (GSM)";    
if ([platform isEqualToString:@"iPad4,4"])      return @"iPad Mini Retina (WiFi)";    
if ([platform isEqualToString:@"iPad4,5"])      return @"iPad Mini Retina (GSM)";    
if ([platform isEqualToString:@"i386"])         return @"Simulator";    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";    
return platform;
}

缓存处理

缓存路径
#define CacheFilePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]

清空缓存

+(BOOL)CleanCacheFilePath{    
//拿到path路径的下一级目录的子文件夹    
NSArray *subPathArr = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:CacheFilePath error:nil];       
NSString *filePath = nil;       
NSError *error = nil;       
for (NSString *subPath in subPathArr)    {        
filePath = [CacheFilePath stringByAppendingPathComponent:subPath];               
//删除子文件夹        [[NSFileManager defaultManager] removeItemAtPath:filePath error:&error];       
 if (error) {          
  NSLog(@"%@",error);          
  continue;       
 }           
}    
return YES;   
}

缓存计算

//转换B/KB/MB/GB
+(NSString *)SetCacheSize:(unsigned long long)fileSize{    
// 单位    
double unit = 1000.0;    
// 标签文字    
NSString *fileSizeText = nil;    
if (fileSize >= pow(unit, 3)) { 
// fileSize >= 1GB        
fileSizeText = [NSString stringWithFormat:@"%.2fGB", fileSize / pow(unit, 3)];    
} else if (fileSize >= pow(unit, 2)) { 
// fileSize >= 1MB        
fileSizeText = [NSString stringWithFormat:@"%.2fMB", fileSize / pow(unit, 2)];   
 } else if (fileSize >= unit) { 
// fileSize >= 1KB        
fileSizeText = [NSString stringWithFormat:@"%.2fKB", fileSize / unit];    
} else { // fileSize < 1KB        
fileSizeText = [NSString stringWithFormat:@"%zdB", fileSize];   
 }    return fileSizeText;
}

给TabBarController添加滑动切换

 //添加滑动手势    
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedRightButton:)];       
[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];    
[self.view addGestureRecognizer:swipeLeft];       
UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(tappedLeftButton:)];       
[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];    
[self.view addGestureRecognizer:swipeRight];

- (void) tappedRightButton:(id)sender{    
NSUInteger selectedIndex = [self.tabBarController selectedIndex];       
NSArray *aryViewController = self.tabBarController.viewControllers;       
if (selectedIndex < aryViewController.count - 1) {                      
   [self.tabBarController setSelectedIndex:selectedIndex + 1];           
  }
}

- (void) tappedLeftButton:(id)sender{       
NSUInteger selectedIndex = [self.tabBarController selectedIndex];       
if (selectedIndex > 0) {               
   [self.tabBarController setSelectedIndex:selectedIndex - 1];          
 }
}

KVO监听###

添加监听

addObserver(self.firstBtn, forKeyPath: "origin", options: [.New], context: nil)

接收监听

override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer) {
 
      print(self.firstBtn.frame.origin.y)
}

移除监听

deinit{   
     removeObserver(self, forKeyPath: "contentOffset")
}

截屏:

//获取当前Window 的截图    
class func getScreenShoot() -> UIImage {               
//获取当前window        
let window = UIApplication.sharedApplication().keyWindow               
//开启图片上下文        
UIGraphicsBeginImageContext(window!.size)              
//截取图片,渲染到图片上下文        
window?.drawViewHierarchyInRect(window!.bounds, afterScreenUpdates: false)               
//获取图片        
let img = UIGraphicsGetImageFromCurrentImageContext()               
//关闭图片上下文        
UIGraphicsEndImageContext()                      
return img
 }

本地文件读写###

创建NSURL的两种方式:

//必须加协议头(存在本地:file://)
1.[NSURL URLWithString:@"file:///Users/whitcast/Documents/1.txt"];  
//不需要加协议头(系统帮你补上了file://)
2.[NSURL fileURLWithPath:@"/Users/whitcast/Documents/1.txt"];

通过url写入文件

NSString* str2= @"hello everyone"; 
NSURL *st =  [NSURL fileURLWithPath:@"/Users/Cube/Desktop/ceshiw/ceshi123.txt"]; 
BOOL result = [str2 writeToURL:st atomically:YES encoding:NSUTF8StringEncoding error:nil];

通过url读取文件

NSString *str1 = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

由于篇幅限制，所以后面的更新会在下一篇继续，感谢关注和支持！