IOS 开发中的一些实用公共方法

1.事件字符串转NSDate  格式：yyyy-MM-dd hh:mm:ss

+ (NSDate*)DateFromString:(NSString*)uiDate
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
    [formatter setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
    NSDate *date=[formatter dateFromString:uiDate];
    return date;
}

2./**
 *视图添加角标
 *superview: 父视图
 *strBadgeValue: 角标数字
 */

+ (UIView *)addBadgeViewTo:(UIView *)superview withBadgeValue:(NSString *)strBadgeValue
{
    UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 50)];
    UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"" image:nil tag:0];
    item.badgeValue = strBadgeValue;
    NSArray *array = [[NSArray alloc] initWithObjects:item, nil];
    tabBar.items = array;
    //寻找
    for (UIView *viewTab in tabBar.subviews) {
        for (UIView *subview in viewTab.subviews) {
            NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
            if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
                [strClassName isEqualToString:@"_UIBadgeView"]) {
                //从原视图上移除
                [subview removeFromSuperview];
                //
                [superview addSubview:subview];
                subview.frame = CGRectMake(superview.frame.size.width-15, -5,
                                           subview.frame.size.width, subview.frame.size.height);
                return subview;
            }
        }
    }
    return nil;
}

3.视图移除角标

+ (void)removeBadgeValue:(NSArray *)subviews
{
    //
    for (UIView *subview in subviews) {
        NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
        if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
            [strClassName isEqualToString:@"_UIBadgeView"]) {
            [subview removeFromSuperview];
            break;
        }
    }
}

4.设置圆角按钮

+ (void)setCornersBtn:(UIButton *)btn text:(NSString *)text{
    [btn setBackgroundColor:[UIColor whiteColor]];
    [btn setTitle:text forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    btn.layer.borderColor=[[UIColor lightGrayColor] CGColor];
    btn.layer.borderWidth=1;
    btn.layer.cornerRadius=4;
}

5.根据文本内容自适应高度

+ (void)setCornersTextView:(UITextView *)tv{
    tv.font=[UIFont systemFontOfSize:14];
    tv.textColor=[UIColor blackColor];
    tv.layer.borderColor=[[UIColor lightGrayColor] CGColor];
    tv.layer.borderWidth=1;
    tv.layer.cornerRadius=4;
}

6.获取本机语言

+ (NSString*)getPreferredLanguage

{

    NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults];

    NSArray * allLanguages = [defaults objectForKey:@"AppleLanguages"];

    NSString * preferredLang = [allLanguages objectAtIndex:0];

    NSLog(@"当前语言:%@", preferredLang);

    return preferredLang;    
}

7.把字典对象转换成json对象

+ (NSString *)dictionaryToJson:(NSDictionary *)dic
{
    NSError *parseError = nil;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];
    return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
}

8.设置UIView所有控件不可交互，只有某个控件可以交互

+ (void)setUserInteractionInView:(UIView *)currentView without:(UIView *)subView{
    NSArray *subViews = [currentView subviews];
    if (subViews.count >0) {
        for (UIView *view in subViews) {
            if ([self isCurrentView:view contain:subView]) {
                [view setUserInteractionEnabled:YES];
                [self setUserInteractionInView:view without:subView];
            }else{
                [view setUserInteractionEnabled:NO];
            }
            if ([view isKindOfClass:[subView class]]) {
                [view setUserInteractionEnabled:YES];

            }
        }
    }
    [currentView setUserInteractionEnabled:YES];
}

9.图片局部拉伸,图片名、上距离、左距离、下距离、右距离、模式1:拉伸、模式2:平铺

+ (UIImage *)ImageWithCapInsets:(NSString *)ImageName andtop:(CGFloat)Top andleft:(CGFloat)Left andbottom:(CGFloat)Bottom andright:(CGFloat)Right andtype:(NSInteger)Type
{
    UIImage* img=[UIImage imageNamed:ImageName];//原图
    UIEdgeInsets edge=UIEdgeInsetsMake(Top, Left, Bottom, Right);
    //UIImageResizingModeStretch：拉伸模式，通过拉伸UIEdgeInsets指定的矩形区域来填充图片
    //UIImageResizingModeTile：平铺模式，通过重复显示UIEdgeInsets指定的矩形区域来填充图
    NSInteger tp;
    if (Type == 1) {
        tp = UIImageResizingModeStretch;
    }else{
        tp = UIImageResizingModeTile;
    }

    img= [img resizableImageWithCapInsets:edge resizingMode:tp];
    return img;
}

10.将颜色以图片的形式展示

+ (UIImage*) createImageWithColor:(UIColor*) color
{
    CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}

11.磁盘总空间

+ (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:NSFileSystemSize];
        size = [number floatValue]/1024/1024;
    }
    return size;
}

12.磁盘可用空间

+ (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;
}

13.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];
}

14.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;
}

15.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;
    }else{
        /** * 移动号段正则表达式 */
        NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
        /** * 联通号段正则表达式 */
        NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
        /** * 电信号段正则表达式 */
        NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
        NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
        BOOL isMatch1 = [pred1 evaluateWithObject:mobile];
        NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
        BOOL isMatch2 = [pred2 evaluateWithObject:mobile];
        NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
        BOOL isMatch3 = [pred3 evaluateWithObject:mobile];

        if (isMatch1 || isMatch2 || isMatch3) {
            return YES;
        }else{
            return NO;
        }
    }
}

16.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];
}

17.将十六进制颜色转换为 UIColor 对象

+ (UIColor *)colorWithHexString:(NSString *)color{
    NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]uppercaseString];
    // String should be 6 or 8 characters
    if ([cString length] < 6) {
        return [UIColor clearColor];
    }
    // strip "0X" or "#" if it appears
    if ([cString hasPrefix:@"0X"])
        cString = [cString substringFromIndex:2];
    if ([cString hasPrefix:@"#"])
        cString = [cString substringFromIndex:1];
    if ([cString length] != 6)
        return [UIColor clearColor];
    // Separate into r, g, b substrings
    NSRange range;
    range.location = 0;
    range.length = 2;
    //r
    NSString *rString = [cString substringWithRange:range];
    //g
    range.location = 2;
    NSString *gString = [cString substringWithRange:range];
    //b
    range.location = 4;
    NSString *bString = [cString substringWithRange:range];
    // Scan values
    unsigned int r, g, b;
    [[NSScanner scannerWithString:rString]scanHexInt:&r];
    [[NSScanner scannerWithString:gString]scanHexInt:&g];
    [[NSScanner scannerWithString:bString]scanHexInt:&b];
    return [UIColor colorWithRed:((float) r / 255.0f)green:((float) g / 255.0f)blue:((float) b / 255.0f)alpha:1.0f];
}

18.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;
}

19.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;
    }
}

20./**
    *  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
    *
    */

+ (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;
}

21.全屏截图

+ (UIImage *)shotScreen{
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    UIGraphicsBeginImageContext(window.bounds.size);
    [window.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

22.截取view生成一张图片

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

23.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;
}

24.绘制虚线

/* ** lineFrame: 虚线的 frame ** length: 虚线中短线的宽度 ** spacing: 虚线中短线之间的间距 ** color: 虚线中短线的颜色 */
+ (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
                           lineLength:(int)length
                          lineSpacing:(int)spacing
                            lineColor:(UIColor *)color{
    UIView *dashedLine = [[UIView alloc]initWithFrame:lineFrame];
    dashedLine.backgroundColor = [UIColor clearColor];
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    [shapeLayer setBounds:dashedLine.bounds];
    [shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
    [shapeLayer setFillColor:[UIColor clearColor].CGColor];
    [shapeLayer setStrokeColor:color.CGColor];
    [shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
    [shapeLayer setLineJoin:kCALineJoinRound];
    [shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path, NULL, 0, 0);
    CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
    [shapeLayer setPath:path];
    CGPathRelease(path);
    [dashedLine.layer addSublayer:shapeLayer];
    return dashedLine;
}