iOS 常用公共方法

1、获取磁盘总空间大小

//磁盘总大小
+ (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、获取磁盘可用空间大小

//磁盘可用空间
+ (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:NSFileSystemFreeSize];
        size = [number floatValue]/1024/1024;
    }
    return size;
}

3、获取指定路径下某个文件的大小

//获取文件大小
+ (long long)fileSizeAtPath:(NSString *)filePath{
    NSFileManager* fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:filePath]) {
        return 0;
    }
    return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
}

4、获取文件夹下所有文件的大小

//获取文件夹下所有文件的大小
+ (long long)folderSizeAtPath:(NSString *)folderPath{
    NSFileManager* fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:folderPath]) {
        return 0;
    }
    NSEnumerator* filesEnumerator = [[fileManager subpathsAtPath:folderPath]objectEnumerator];
    NSString* fileName;
    long long folerSize = 0;
    while ((fileName = [filesEnumerator nextObject]) != nil) {
        NSString* filePath = [folderPath stringByAppendingPathComponent:fileName];
        folerSize += [self fileSizeAtPath:filePath];
    }
    return folerSize;
}
//获取文件大小
+ (long long)fileSizeAtPath:(NSString *)filePath{
    NSFileManager* fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:filePath]) {
        return 0;
    }
    return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
}

5、获取字符串（或汉字）首字母

//获取字符串（或汉字）首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
    NSMutableString* str = [NSMutableString stringWithString:string];
    //汉字转英文
    CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
    CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
    NSString* pingyin = [str capitalizedString];
    return [pingyin substringToIndex:1];
}

6、将字符串数组按照元素首字母顺序进行排序分组

//将字符串数组按照元素首字母顺序进行排序
+ (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{
    if (array.count == 0) {
        return nil;
    }
    for (id obj in array) {
        if (![obj isKindOfClass:[NSString class]]) {
            return nil;
        }
    }
    UILocalizedIndexedCollation* indexedCollation = [UILocalizedIndexedCollation 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];
    //按照字母顺序进行分组
    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;
}
//获取字符串（或汉字）首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
    NSMutableString* str = [NSMutableString stringWithString:string];
    //汉字转英文
    CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
    CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
    NSString* pingyin = [str capitalizedString];
    return [pingyin substringToIndex:1];
}

使用：

NSLog(@"%@",[[self class]dictionaryOrderByCharacterWithOriginalArray:@[@"guangzhou",@"shanghai",@"北京",@"henan"]]);

打印：

{
        (
        B,
        G,
        H,
        S
    ) =     (
                (
            "\U5317\U4eac"
        ),
                (
            guangzhou
        ),
                (
            henan
        ),
                (
            shanghai
        )
    );
}

7、获取当前时间

//获取当前时间
//format:@"yyyy-MM-dd HH:mm:ss"、@"yyyy年MM月dd日 HH时mm分ss秒"
+ (NSString* )currentDateWithFormat:(NSString *)format{
    NSDateFormatter* dateFormatter = [[NSDateFormatter alloc]init]; [dateFormatter setDateFormat:format]; return [dateFormatter stringFromDate:[NSDate date]];
}

8、计算上次日期距离现在多久，如XX小时前、XX分钟前等

/** * 计算上次日期距离现在多久 * * @param lastTime 上次日期（需要和格式对应） * @param format1 上次日期格式 * @param currentTime 最近日期（需要和格式对应） * @param format2 最近日期格式 * * @return xx分钟前、xx小时前、xx天前 */
+ (NSString *)timeIntervalFromLastTime:(NSString *)lastTime lasetTimeFormat:(NSString *)format1 toCurrentTime:(NSString *)currentTime currentTimeFormat:(NSString *)format2{
    //上次时间
    NSDateFormatter* dateFormatter1 = [[NSDateFormatter alloc]init];
    dateFormatter1.dateFormat = format1;
    NSDate* lastDate = [dateFormatter1 dateFromString:lastTime];
    //当前时间
    NSDateFormatter* dateFormatter2 = [[NSDateFormatter alloc]init];
    dateFormatter2.dateFormat = format2;
    NSDate* currentDate = [dateFormatter2 dateFromString:currentTime];
    return [self timeIntervalFromLastTime:lastDate toCurrentTime:currentDate];
}
+ (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime toCurrentTime:(NSDate *)currentTime{
    NSTimeZone* timeZone = [NSTimeZone systemTimeZone];
    //上次时间
    NSDate* lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];
    //当前时间
    NSDate* currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];
    //时间间隔
    NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];
    //秒、分、小时、天、月、日
    NSInteger minutes = intevalTime/60;
    NSInteger hours = intevalTime/60/60;
    NSInteger day = intevalTime/60/60/24;
    NSInteger mouth = intevalTime/60/60/24/30;
    NSInteger years = intevalTime/60/60/24/30/365;
    if (minutes <= 10) {
        return @"刚刚";
    }else if (minutes < 60){
        return [NSString stringWithFormat:@"%ld分钟前",(long)minutes];
    }else if (hours < 24){
        return [NSString stringWithFormat:@"%ld小时前",(long)hours];
    }else if (day < 30){
        return [NSString stringWithFormat:@"%ld天前",(long)day];
    }else if (mouth < 12){
        NSDateFormatter* df = [[NSDateFormatter alloc]init];
        df.dateFormat = @"M月d日";
        NSString* time = [df stringFromDate:lastDate];
        return time;
    }else if (years >= 1){
        NSDateFormatter* df = [[NSDateFormatter alloc]init];
        df.dateFormat = @"yyyy年M月d日";
        NSString* time = [df stringFromDate:lastDate];
        return time;
    }
    return @"";
}

使用：

NSLog(@"%@",[[self class]timeIntervalFromLastTime:@"2016年6月27日 15:50" lasetTimeFormat:@"yyyy年MM月dd日 HH:mm" toCurrentTime:@"2016/6/27 16:12" currentTimeFormat:@"yyyy/MM/dd HH:mm"]);

打印：

22分钟前

9、判断手机号码格式是否正确

//判断手机号码格式是否正确
+ (BOOL)valiMobile:(NSString *)mobile{
    mobile = [mobile stringByReplacingOccurrencesOfString:@" " withString:@""];
    if (mobile.length != 11) {
        return NO;
    }
    NSString *phoneRegex = @"^((17[0-9])|(13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";
    NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];
    NSString *phoneRegex2=@"^1(47[0-9])\\d{7}$";
    NSPredicate *phoneTest2=[NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex2];
    return [phoneTest evaluateWithObject:mobile]|[phoneTest2 evaluateWithObject:mobile];
}

10、判断邮箱格式是否正确

//判断邮箱格式是否正确
+ (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];
}

11、对图片进行滤镜处理

#pragma mark -- 对图片进行滤镜处理
//name支持如下：
//怀旧-->CIPhotoEffectInstant
//单色-->CIPhotoEffectMono
//黑白-->CIPhotoEffectNoir
//褪色-->CIPhotoEffectFade
//色调-->CIPhotoEffectTonal
//冲印-->CIPhotoEffectProcess
//岁月-->CIPhotoEffectTransfer
//铬黄-->CIPhotoEffectMono
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{
    CIContext* context = [CIContext contextWithOptions:nil];
    CIImage* inputImage = [[CIImage alloc]initWithImage:image]; //创建滤镜 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;
}

12、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）
#pragma mark -- 对图片进行模糊处理
+ (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;
    }
}

13、调整图片饱和度、亮度、对比度

/** * 调整图片饱和度、亮度、对比度 * *  @param image 目标图片 *  @param saturation 饱和度 *  @param brightness 亮度: -1.0~1.0 *  @param contrast 对比度 * *  @return 改变后图片 */
- (UIImage *)colorControlsWithOriginalImage:(UIImage *)image saturation:(CGFloat)saturation brightness:(CGFloat)brightness contrast:(CGFloat)contrast{
    CIContext* context = [CIContext contextWithOptions:nil];
    CIImage* inputImage = [[CIImage alloc]initWithImage:image];
    CIFilter* filter = [CIFilter filterWithName:@"CIColorControls"];
    [filter setValue:inputImage forKey:kCIInputImageKey];
    [filter setValue:@(saturation) forKey:@"inputSaturation"];
    [filter setValue:@(brightness) forKey:@"inputBrightness"];
    [filter setValue:@(contrast) forKey:@"inputContrast"];
    CIImage* result = [filter valueForKey:kCIOutputImageKey];
    CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
    UIImage* resultImage = [UIImage imageWithCGImage:cgImage];
    CGImageRelease(cgImage);
    return resultImage;
}

14、创建一张实时模糊效果的View（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;
}

15、全屏截图

//全屏截图
+ (UIImage *)shotWithView:(UIView *)view{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

16、全屏截图

//全屏截图
+ (UIImage *)shotWithView:(UIView *)view{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

17、截取view中某个区域生成一张图片

//截取view中某个区域生成一张图片
+ (UIImage *)shotWithView:(UIView *)view scope:(CGRect)scope{
    CGImageRef imageRef = CGImageCreateWithImageInRect([self shotWithView:view].CGImage, scope);
    UIGraphicsBeginImageContext(scope.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGRect rect = CGRectMake(0, 0, scope.size.width, scope.size.height);
    CGContextTranslateCTM(context, 0, rect.size.height);//下移
    CGContextScaleCTM(context, 1.0f, -1.0f);//上翻
    CGContextDrawImage(context, rect, imageRef);
    UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    CGImageRelease(imageRef);
    CGContextRelease(context);
    return image;
}
//全屏截图
+ (UIImage *)shotWithView:(UIView *)view{
    UIGraphicsBeginImageContext(view.bounds.size);
    [view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage* image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

18、压缩图片到指定尺寸大小

//压缩图片到指定尺寸大小
+ (UIImage *)compressOriginalImage:(UIImage *)image toSize:(CGSize)size{
    UIImage* resultImage = image;
    UIGraphicsBeginImageContext(size);
    [resultImage drawInRect:CGRectMake(0, 0, size.width, size.height)];
    UIGraphicsEndImageContext();
    return resultImage;
}

19、压缩图片到指定文件大小

//压缩图片到指定文件大小
+ (NSData *)compressOriginalImage:(UIImage *)image toMaxDataSizeKBytes:(CGFloat)size{
    NSData* data = UIImageJPEGRepresentation(image, 1.0);
    CGFloat dataKBytes = data.length/1000.0;
    CGFloat maxQuality = 0.9f;
    CGFloat lastData = dataKBytes;
    while (dataKBytes > size &&maxQuality > 0.01f) {
        maxQuality = maxQuality - 0.01f;
        data = UIImageJPEGRepresentation(image, maxQuality);
        CGFloat dataKBytes = data.length/1000.0;
        if (lastData == dataKBytes) {
            break;
        }else{
            lastData = dataKBytes;
        }
    }
    return data;
}

20、获取设备 IP 地址

需要先引入下头文件

#import <ifaddrs.h>
#import <arpa/inet.h>

//获取设备IP地址
+ (NSString *)getIPAddress{
    NSString* address = @"error";
    struct ifaddrs* interfaces = NULL;
    struct ifaddrs* temp_addr = NULL;
    int success = 0;
    success = getifaddrs(&interfaces);
    if (success == 0) {
        temp_addr = interfaces;
        while (temp_addr != NULL) {
            if (temp_addr->ifa_addr->sa_family == AF_INET) {
                if ([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    freeifaddrs(interfaces);
    return address;
}

21、判断字符串中是否含有空格

//判断字符串中是否含有空格
+ (BOOL)isHaceSpaceInString:(NSString *)string{
    NSRange _range = [string rangeOfString:@" "];
    if (_range.location != NSNotFound) {
        return YES;
    }
    return NO;
}

22、判断字符串中是否含有某个字符串

//判断字符串中是否含有某个字符串
+ (BOOL)isHaveString:(NSString *)string1 inString:(NSString *)string2{
    NSRange _range = [string2 rangeOfString:string1];
    if (_range.location != NSNotFound) {
        return YES;
    }
    return NO;
}

23、判断字符串中是否含有中文

//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;
}

24、判断字符串是否全部为数字

//判断字符串是否全部为数字
+ (BOOL)isAllNum:(NSString *)string{
    unichar c;
    for (int i = 0; i < [string length]; i ++) {
        c = [string characterAtIndex:i];
        if (!isdigit(c)) {
            return NO;
        }
    }
    return YES;
}