iOS开发中常用类目

来源：互联网发布：catia v6软件下载编辑：程序博客网时间：2024/05/17 23:49

1.NSDateFomatter

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

Java
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@implementationNSDateFormatter(MyCategory)
 
+(id)dateFormatter
{
    return[[selfalloc]init];
}
 
+(id)dateFormatterWithFormat:(NSString*)dateFormat
{
    NSDateFormatter*dateFormatter=[[selfalloc]init];
    dateFormatter.dateFormat=dateFormat;
    returndateFormatter;
}
 
+(id)defaultDateFormatter
{
    return[selfdateFormatterWithFormat:@"yyyy-MM-dd HH:mm:ss"];
}
 
@end

2.NSDate

Objective-C
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@interface NSDate (MyCategory)
 
- (NSString *)timeIntervalDescription;//距离当前的时间间隔
- (NSString *)minuteDescription;//精确到分钟的日期
- (NSString *)formattedDateDescription;//格式化日期
 
@end

Objective-C
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@implementationNSDate(MyCategory)
 
 
-(NSString*)timeIntervalDescription
{    
    NSTimeIntervaltimeInterval=-[selftimeIntervalSinceNow];
    if(timeInterval<60){
        return@"1分钟内";
    }elseif(timeInterval<3600){
        return[NSString stringWithFormat:@"%.f分钟前",timeInterval/60];
    }elseif(timeInterval<86400){
        return[NSString stringWithFormat:@"%.f小时前",timeInterval/3600];
    }elseif(timeInterval<2592000){//30天内
        return[NSString stringWithFormat:@"%.f天前",timeInterval/86400];
    }elseif(timeInterval<31536000){//30天至1年内
        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:[NSDatedate]];//当前年月日
    if([theDay isEqualToString:currentDay]){//当天
        [dateFormatter setDateFormat:@"ah:mm"];
        return[dateFormatter stringFromDate:self];
    }elseif([[dateFormatter dateFromString:currentDay] timeIntervalSinceDate:[dateFormatter dateFromString:theDay]]==86400){//昨天
        [dateFormatter setDateFormat:@"ah:mm"];
        return[NSString stringWithFormat:@"昨天 %@",[dateFormatter stringFromDate:self]];
    }elseif([[dateFormatter dateFromString:currentDay] timeIntervalSinceDate:[dateFormatter dateFromString:theDay]]<86400*7){//间隔一周内
        [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=[[NSDateFormatteralloc] init];
    
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    NSString*theDay=[dateFormatter stringFromDate:self];//日期的年月日
    NSString*currentDay=[dateFormatter stringFromDate:[NSDatedate]];//当前年月日
    
    NSIntegertimeInterval=-[selftimeIntervalSinceNow];
    if(timeInterval<60){
        return@"1分钟内";
    }elseif(timeInterval<3600){//1小时内
        return[NSString stringWithFormat:@"%d分钟前",timeInterval/60];
    }elseif(timeInterval<21600){//6小时内
        return[NSString stringWithFormat:@"%d小时前",timeInterval/3600];
    }elseif([theDay isEqualToString:currentDay]){//当天
        [dateFormatter setDateFormat:@"HH:mm"];
        return[NSString stringWithFormat:@"今天 %@",[dateFormatter stringFromDate:self]];
    }elseif([[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

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

Objective-C
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@implementationUIColor(MyCategory)
 
/*由16进制字符串获取颜色*/
+(UIColor*)colorWithHexRGB:(NSString*)hexRGBString
{
    
    if([hexRGBString hasPrefix:@"#"]){
        
        hexRGBString=[hexRGBString substringFromIndex:1];
    }
    unsignedintcolorCode=0;
    unsignedcharredByte,greenByte,blueByte;
    
    if(hexRGBString){
        NSScanner*scanner=[NSScanner scannerWithString:hexRGBString];
        [scanner scanHexInt:&colorCode];
    }
    redByte=(unsignedchar)(colorCode>>16);
    greenByte=(unsignedchar)(colorCode>>8);
    blueByte=(unsignedchar)(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

Objective-C
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@interface UIImage (MyCategory)  
//图片拉伸、平铺接口   
- (UIImage *)resizableImageWithCompatibleCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode;  
//图片以ScaleToFit方式拉伸后的CGSize  
- (CGSize)sizeOfScaleToFit:(CGSize)scaledSize;  
  
//将图片转向调整为向上  
- (UIImage *)fixOrientation;  
  
//以ScaleToFit方式压缩图片  
- (UIImage *)compressedImageWithSize:(CGSize)compressedSize;  
  
@end

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@implementationUIImage(MyCategory)
/*获取当前主题包的指定图片*/
+(UIImage*)themeImageNamed:(NSString*)name
{
    NSUIntegerthemeID=[[ViewManagerdefaultManager] themeID];
    if(themeID==0){//默认主题
        NSString*fileName=[NSString stringWithFormat:@"Lianxi.bundle/Images/%@",name];
        return[self imageNamed:fileName];
    }else{//下载主题
        returnnil;
    }
}
 
/*图片拉伸、平铺接口，兼容iOS5+*/
-(UIImage*)resizableImageWithCompatibleCapInsets:(UIEdgeInsets)capInsets resizingMode:(UIImageResizingMode)resizingMode
{
    CGFloatversion=[[[UIDevicecurrentDevice] systemVersion] floatValue];
    if(version>=6.0){
        return[self resizableImageWithCapInsets:capInsets resizingMode:resizingMode];
    }elseif(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];
    }
}
 
/*图片以ScaleToFit方式拉伸后的CGSize*/
-(CGSize)sizeOfScaleToFit:(CGSize)scaledSize
{
    CGFloatscaleFactor=scaledSize.width/scaledSize.height;
    CGFloatimageFactor=self.size.width/self.size.height;
    if(scaleFactor<=imageFactor){//图片横向填充
        returnCGSizeMake(scaledSize.width,scaledSize.width/imageFactor);
    }else{//纵向填充
        returnCGSizeMake(scaledSize.height*imageFactor,scaledSize.height);
    }
}
 
/*将图片转向调整为向上*/
-(UIImage*)fixOrientation
{
    if(self.imageOrientation==UIImageOrientationUp){
        returnself;
    }
    
    UIGraphicsBeginImageContextWithOptions(self.size,NO,self.scale);
    [self drawInRect:CGRectMake(0.0,0.0,self.size.width,self.size.height)];
    
    UIImage*fixedImage=UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    returnfixedImage;
    
}
/*以ScaleToFit方式压缩图片*/
-(UIImage*)compressedImageWithSize:(CGSize)compressedSize
{
    if(CGSizeEqualToSize(self.size,CGSizeZero)||(self.size.width<=compressedSize.width&&self.size.height<=compressedSize.height)){//不用压缩
        returnself;
    }
    
    CGSizescaledSize=[self sizeOfScaleToFit:compressedSize];
    
    //压缩大小，调整转向
    UIGraphicsBeginImageContext(scaledSize);
    [self drawInRect:CGRectMake(0.0,0.0,scaledSize.width,scaledSize.height)];
    UIImage*compressedImage=UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    returncompressedImage;
}
 
@end

5.UIView

Objective-C
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@interface UIView (MyCategory)
 
- (void)startShakeAnimation;//摇动动画
- (void)stopShakeAnimation;
- (void)startRotateAnimation;//360°旋转动画
- (void)stopRotateAnimation;
 
///截图
- (UIImage *)screenshot;
 
@property (nonatomic) float top;
@property (nonatomic) float bottom;
@property (nonatomic) float left;
@property (nonatomic) float right;
 
@end

Objective-C
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@implementationUIView(MyCategory)
 
/*截图*/
-(UIImage*)screenshot
{
    UIGraphicsBeginImageContextWithOptions(self.frame.size,NO,2.0);
    [self.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage*image=UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    returnimage;
}
 
 
 
#pragma mark - Animation
 
-(void)startShakeAnimation
{
    CGFloatrotation=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
{
    returnself.frame.origin.x;
}
-(float)bottom
{
    returnself.top+self.frame.size.height;
}
-(float)left
{
    returnself.frame.origin.x;
}
-(float)right
{
    returnself.left+self.frame.size.width;
}
 
@end

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