Q:为什么要写这个东西?
A:因为我们产品上线一年多了,产品那边忽然来了一个换肤的需求,所以不得考虑一个比较廉价的换肤方式.

Q:有用到第三方库吗?
A:当然有,用到的库详见Podfile或IMY_Theme.podspec.json 当然你可以修改代码来解除对这些库的依赖.

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我们来看看效果

使用方法

UINavigationBar+IMY_Theme.h
- (void)imy_setBackgroundImageWithKey:(NSString *)key forBarMetrics:(UIBarMetrics)barMetrics;

UITabBarItem+IMY_Theme
- (void)imy_setFinishedSelectedImageName:(NSString *)selectedImageName withFinishedUnselectedImageName:(NSString *)unselectedImageName;

UIButton+IMY_Theme
- (void)imy_setImageForKey:(NSString *)key andState:(UIControlState)state;

- (void)imy_setImageForKey:(NSString *)key andState:(UIControlState)state stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight;

- (void)imy_setCenterResizeImageForKey:(NSString *)key andState:(UIControlState)state;

- (void)imy_setBackgroundImageForKey:(NSString *)key andState:(UIControlState)state;

- (void)imy_setCenterResiseBackgroudImageForKey:(NSString *)key andState:(UIControlState)state;

- (void)imy_setBackgroudImageForKey:(NSString *)key stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight forState:(UIControlState)state;

- (void)imy_setTitleColorForKey:(NSString *)key andState:(UIControlState)state;

UIImageView+IMY_Theme
- (void)imy_setImageForKey:(NSString *)key;

- (void)imy_setHighlightedImageForKey:(NSString *)key;

- (void)imy_setImageForKey:(NSString *)key stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight;

- (void)imy_setHighlightedImageForKey:(NSString *)key stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight;

- (void)imy_setCenterResizeImageForKey:(NSString *)key;

- (void)imy_setCenterResizeHighlightedImageForKey:(NSString *)key;

背景颜色和文字相关的
@interface UIView (IMY_Theme_BackgroundColor)//请忽略这个category的名字
- (void)imy_setBackgroundColorForKey:(NSString *)key;

- (void)imy_setTextColorForKey:(NSString *)key;

- (void)imy_setHighlightedTextColorForKey:(NSString *)key;
@end

还有另外一种方式,详见Demo,适用于所有的NSObject