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1.NSDateFomatter

@interface NSDateFormatter (MyCategory)  
  
+ (id)dateFormatter;  
+ (id)dateFormatterWithFormat:(NSString *)dateFormat;  
  
+ (id)defaultDateFormatter;  
  
@end 

@implementation NSDateFormatter (MyCategory)

+ (id)dateFormatter
{
    return [[self alloc] init];
}

+ (id)dateFormatterWithFormat:(NSString *)dateFormat
{
    NSDateFormatter *dateFormatter = [[self alloc] init];
    dateFormatter.dateFormat = dateFormat;
    return dateFormatter;
}

+ (id)defaultDateFormatter
{
    return [self dateFormatterWithFormat:@"yyyy-MM-dd HH:mm:ss"];
}

@end

2.NSDate

@interface NSDate (MyCategory)  
  
- (NSString *)timeIntervalDescription;//距離當(dāng)前的時(shí)間間隔  
- (NSString *)minuteDescription;//精確到分鐘的日期  
- (NSString *)formattedDateDescription;//格式化日期  
  
@end  

@implementation NSDate (MyCategory)  

- (NSString *)timeIntervalDescription  
{      
    NSTimeInterval timeInterval = -[self timeIntervalSinceNow];  
    if (timeInterval < 60) {  
        return @"1分鐘內(nèi)";  
    } else if (timeInterval < 3600) {  
        return [NSString stringWithFormat:@"%.f分鐘前", timeInterval / 60];  
    } else if (timeInterval < 86400) {  
        return [NSString stringWithFormat:@"%.f小時(shí)前", timeInterval / 3600];  
    } else if (timeInterval < 2592000) {//30天內(nèi)  
        return [NSString stringWithFormat:@"%.f天前", timeInterval / 86400];  
    } else if (timeInterval < 31536000) {//30天至1年內(nèi)  
        NSDateFormatter *dateFormatter = [NSDateFormatter dateFormatterWithFormat:@"M月d日"];  
        return [dateFormatter stringFromDate:self];  
    } else {  
        return [NSString stringWithFormat:@"%.f年前", timeInterval / 31536000];  
    }  
}  
  
  
- (NSString *)minuteDescription  
{  
    NSDateFormatter *dateFormatter = [NSDateFormatter dateFormatterWithFormat:@"yyyy-MM-dd"];  
      
    NSString *theDay = [dateFormatter stringFromDate:self];//日期的年月日  
    NSString *currentDay = [dateFormatter stringFromDate:[NSDate date]];//當(dāng)前年月日  
    if ([theDay isEqualToString:currentDay]) {//當(dāng)天  
        [dateFormatter setDateFormat:@"ah:mm"];  
        return [dateFormatter stringFromDate:self];  
    } else if ([[dateFormatter dateFromString:currentDay] timeIntervalSinceDate:[dateFormatter dateFromString:theDay]] == 86400) {//昨天  
        [dateFormatter setDateFormat:@"ah:mm"];  
        return [NSString stringWithFormat:@"昨天 %@", [dateFormatter stringFromDate:self]];  
    } else if ([[dateFormatter dateFromString:currentDay] timeIntervalSinceDate:[dateFormatter dateFromString:theDay]] < 886400 * 7) {//間隔一周內(nèi)  
        [dateFormatter setDateFormat:@"EEEE ah:mm"];  
        return [dateFormatter stringFromDate:self];  
    } else {//以前  
        [dateFormatter setDateFormat:@"yyyy-MM-dd ah:mm"];  
        return [dateFormatter stringFromDate:self];  
    }  
}  
  
  
- (NSString *)formattedDateDescription  
{  
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];  
      
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];  
    NSString *theDay = [dateFormatter stringFromDate:self];//日期的年月日  
    NSString *currentDay = [dateFormatter stringFromDate:[NSDate date]];//當(dāng)前年月日  
      
    NSInteger timeInterval = -[self timeIntervalSinceNow];  
    if (timeInterval < 60) {  
        return @"1分鐘內(nèi)";  
    } else if (timeInterval < 3600) {//1小時(shí)內(nèi)  
        return [NSString stringWithFormat:@"%d分鐘前", timeInterval / 60];  
    } else if (timeInterval < 21600) {//6小時(shí)內(nèi)  
        return [NSString stringWithFormat:@"%d小時(shí)前", timeInterval / 3600];  
    } else if ([theDay isEqualToString:currentDay]) {//當(dāng)天  
        [dateFormatter setDateFormat:@"HH:mm"];  
        return [NSString stringWithFormat:@"今天 %@", [dateFormatter stringFromDate:self]];  
    } else if ([[dateFormatter dateFromString:currentDay] timeIntervalSinceDate:[dateFormatter dateFromString:theDay]] == 86400) {//昨天  
        [dateFormatter setDateFormat:@"HH:mm"];  
        return [NSString stringWithFormat:@"昨天 %@", [dateFormatter stringFromDate:self]];  
    } else {//以前  
        [dateFormatter setDateFormat:@"MM-dd HH:mm"];  
        return [dateFormatter stringFromDate:self];  
    }  
}  
  
@end

3.UIColor

@interface UIColor (MyCategory)  
  
+ (UIColor *)colorWithHexRGB:(NSString *)hexRGBString;  
  
@end  


@implementation UIColor (MyCategory)  
  
/*由16進(jìn)制字符串獲取顏色*/  
+ (UIColor *)colorWithHexRGB:(NSString *)hexRGBString  
{  
      
    if ([hexRGBString hasPrefix:@"#"]) {  
          
        hexRGBString = [hexRGBString substringFromIndex:1];  
    }  
    unsigned int colorCode = 0;  
    unsigned char redByte, greenByte, blueByte;  
      
    if (hexRGBString) {  
        NSScanner *scanner = [NSScanner scannerWithString:hexRGBString];  
        [scanner scanHexInt:&colorCode];  
    }  
    redByte = (unsigned char) (colorCode >> 16);  
    greenByte = (unsigned char) (colorCode >> 8);  
    blueByte = (unsigned char) (colorCode); // masks off high bits  
      
    return [UIColor colorWithRed:(float)redByte/0xff green:(float)greenByte/0xff blue:(float)blueByte/0xff alpha:1.0];  
}  
@end

4.UIImage

@interface UIImage (MyCategory)  
//圖片拉伸、平鋪接口   
- (UIImage *)resizableImageWithCompatibleCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode;  
//圖片以ScaleToFit方式拉伸后的CGSize  
- (CGSize)sizeOfScaleToFit:(CGSize)scaledSize;  
  
//將圖片轉(zhuǎn)向調(diào)整為向上  
- (UIImage *)fixOrientation;  
  
//以ScaleToFit方式壓縮圖片  
- (UIImage *)compressedImageWithSize:(CGSize)compressedSize;  
  
@end  


@implementation UIImage (MyCategory)  
/*獲取當(dāng)前主題包的指定圖片*/  
+ (UIImage *)themeImageNamed:(NSString *)name  
{  
    NSUInteger themeID = [[ViewManager defaultManager] themeID];  
    if (themeID == 0) {//默認(rèn)主題  
        NSString *fileName = [NSString stringWithFormat:@"Lianxi.bundle/Images/%@", name];  
        return [self imageNamed:fileName];  
    } else {//下載主題  
        return nil;  
    }  
}  
  
/*圖片拉伸、平鋪接口，兼容iOS5+*/  
- (UIImage *)resizableImageWithCompatibleCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode  
{  
    CGFloat version = [[[UIDevice currentDevice] systemVersion] floatValue];  
    if (version >= 6.0) {  
        return [self resizableImageWithCapInsets:capInsets resizingMode:resizingMode];  
    } else if (version >= 5.0) {  
        if (resizingMode == UIImageResizingModeStretch) {  
            return [self stretchableImageWithLeftCapWidth:capInsets.left topCapHeight:capInsets.top];  
        } else {//UIImageResizingModeTile  
            return [self resizableImageWithCapInsets:capInsets];  
        }  
    } else {  
        return [self stretchableImageWithLeftCapWidth:capInsets.left topCapHeight:capInsets.top];  
    }  
}  
  
/*圖片以ScaleToFit方式拉伸后的CGSize*/  
- (CGSize)sizeOfScaleToFit:(CGSize)scaledSize  
{  
    CGFloat scaleFactor = scaledSize.width / scaledSize.height;  
    CGFloat imageFactor = self.size.width / self.size.height;  
    if (scaleFactor <= imageFactor) {//圖片橫向填充  
        return CGSizeMake(scaledSize.width, scaledSize.width / imageFactor);  
    } else {//縱向填充  
        return CGSizeMake(scaledSize.height * imageFactor, scaledSize.height);  
    }  
}  
  
/*將圖片轉(zhuǎn)向調(diào)整為向上*/  
- (UIImage *)fixOrientation  
{  
    if (self.imageOrientation == UIImageOrientationUp) {  
        return self;  
    }  
      
    UIGraphicsBeginImageContextWithOptions(self.size, NO, self.scale);  
    [self drawInRect:CGRectMake(0.0, 0.0, self.size.width, self.size.height)];  
      
    UIImage *fixedImage = UIGraphicsGetImageFromCurrentImageContext();  
    UIGraphicsEndImageContext();  
      
    return fixedImage;  
      
}  
/*以ScaleToFit方式壓縮圖片*/  
- (UIImage *)compressedImageWithSize:(CGSize)compressedSize  
{  
    if (CGSizeEqualToSize(self.size, CGSizeZero) || (self.size.width <= compressedSize.width && self.size.height <= compressedSize.height)) {//不用壓縮  
        return self;  
    }  
      
    CGSize scaledSize = [self sizeOfScaleToFit:compressedSize];  
      
    //壓縮大小，調(diào)整轉(zhuǎn)向  
    UIGraphicsBeginImageContext(scaledSize);  
    [self drawInRect:CGRectMake(0.0, 0.0, scaledSize.width, scaledSize.height)];  
    UIImage *compressedImage = UIGraphicsGetImageFromCurrentImageContext();  
    UIGraphicsEndImageContext();  
      
    return compressedImage;  
}  
  
@end

5.UIView

@interface UIView (MyCategory)  
  
- (void)startShakeAnimation;//搖動(dòng)動(dòng)畫  
- (void)stopShakeAnimation;  
- (void)startRotateAnimation;//360°旋轉(zhuǎn)動(dòng)畫  
- (void)stopRotateAnimation;  
  
///截圖  
- (UIImage *)screenshot;  
  
@property (nonatomic) float top;  
@property (nonatomic) float bottom;  
@property (nonatomic) float left;  
@property (nonatomic) float right;  
  
@end  


@implementation UIView (MyCategory)  
  
/*截圖*/  
- (UIImage *)screenshot  
{  
    UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 2.0);  
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];  
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();  
    UIGraphicsEndImageContext();  
      
    return image;  
}  
  
  
  
#pragma mark - Animation  
  
- (void)startShakeAnimation  
{  
    CGFloat rotation = 0.05;  
      
    CABasicAnimation *shake = [CABasicAnimation animationWithKeyPath:@"transform"];  
    shake.duration = 0.2;  
    shake.autoreverses = YES;  
    shake.repeatCount = MAXFLOAT;  
    shake.removedOnCompletion = NO;  
    shake.fromValue = [NSValue valueWithCATransform3D:CATransform3DRotate(self.layer.transform, -rotation, 0.0, 0.0, 1.0)];  
    shake.toValue   = [NSValue valueWithCATransform3D:CATransform3DRotate(self.layer.transform,  rotation, 0.0, 0.0, 1.0)];  
      
    [self.layer addAnimation:shake forKey:@"shakeAnimation"];  
}  
  
- (void)stopShakeAnimation  
{  
    [self.layer removeAnimationForKey:@"shakeAnimation"];  
}  
  
- (void)startRotateAnimation  
{  
    CABasicAnimation *shake = [CABasicAnimation animationWithKeyPath:@"transform"];  
    shake.duration = 0.5;  
    shake.autoreverses = NO;  
    shake.repeatCount = MAXFLOAT;  
    shake.removedOnCompletion = NO;  
    shake.fromValue = [NSValue valueWithCATransform3D:CATransform3DRotate(self.layer.transform, M_PI, 0.0, 0.0, 1.0)];  
    shake.toValue   = [NSValue valueWithCATransform3D:CATransform3DRotate(self.layer.transform,  0.0, 0.0, 0.0, 1.0)];  
      
    [self.layer addAnimation:shake forKey:@"rotateAnimation"];  
}  
  
- (void)stopRotateAnimation  
{  
    [self.layer removeAnimationForKey:@"rotateAnimation"];  
}  
  
-(float)top  
{  
    return self.frame.origin.x;  
}  
-(float)bottom  
{  
    return self.top+self.frame.size.height;  
}  
-(float)left  
{  
    return self.frame.origin.x;  
}  
-(float)right  
{  
    return self.left+self.frame.size.width;  
}  
  
@end
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