OC中常见的分类 OC中常见的分类

转载自CSDN
二 iOS常见分类 【OC中常见的分类】一些必要的类别iOS开发。包括的NSDate，的NSString，NSUserDefaults的，和的UIColor帮助UIImage的方法。
1. NSDate

-(NSString *)formatWithString:(NSString *)format; -(NSString *)formatWithStyle:(NSDateFormatterStyle)style; -(NSString *)distanceOfTimeInWords; -(NSString *)distanceOfTimeInWords:(NSDate *)date;

2. NSString

-(NSString *)MD5; -(NSString *)sha1; -(NSString *)reverse; -(NSString *)URLEncode; -(NSString *)URLDecode; -(NSString *)stringByStrippingWhitespace; -(NSString *)substringFrom:(NSInteger)from to:(NSInteger)to; -(NSString *)CapitalizeFirst:(NSString *)source; -(NSString *)UnderscoresToCamelCase:(NSString*)underscores; -(NSString *)CamelCaseToUnderscores:(NSString *)input; -(NSUInteger)countWords; -(BOOL)contains:(NSString *)string; -(BOOL)isBlank;

3. NSUserDefaults

+(void)saveObject:(id)object forKey:(NSString *)key; +(id)retrieveObjectForKey:(NSString *)key; +(void)deleteObjectForKey:(NSString *)key;

4. UIColor

+(UIColor *)colorWithHex:(int)hex;

5. UIImage + GIF

+(UIImage *)animatedImageWithAnimatedGIFData:(NSData *)theData; +(UIImage *)animatedImageWithAnimatedGIFURL:(NSURL *)theURL;

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地址：https://github.com/onevcat/VVDocumenter-Xcode
2：将JSON格式化输出为模型的属性
地址：https://github.com/EnjoySR/ESJsonFormat-Xcode
3：图片提示插件
地址：https://github.com/ksuther/KSImageNamed-Xcode
4：图片转换插件
地址：https://github.com/rickytan/RTImageAssets