APP 动态换肤方案详解

@interface UIView (Skin)@property (nonatomic, copy) NSDictionary *skinMap;@end@implementation UIView (Skin)static void *kUIViewSkinMap;- (void)setSkinMap:(NSDictionary *)skinMap {    objc_setAssociatedObject(self, &kUIViewSkinMap, skinMap, OBJC_ASSOCIATION_COPY_NONATOMIC);    // 判断是否已注册监听换肤通知    if (!_registerSkinNotic) {        // 注册监听换肤通知        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(skinChanged:) name:kSkinDidChangeNotification object:nil];    }    // 触发样式设置    [self skinChanged:nil];}- (NSDictionary *)skinMap {    return objc_getAssociatedObject(self, &kUIViewSkinMap);}
- (void)skinChanged:(NSDictionary *)notic {    NSDictionary *skinMap = self.skinMap;    if ([self isKindOfClass:[UILabel class]]) {        UILabel *obj = (UILabel *)self;        if (skinMap[NSStringFromSelector(@selector(setTextColor:))]) {            obj.textColor = [SkinManager colorWithKey:skinMap[NSStringFromSelector(@selector(setTextColor:))]];        }        if (skinMap[NSStringFromSelector(@selector(setBackgroundColor:))]) {            obj.backgroundColor = [SkinManager colorWithKey:skinMap[NSStringFromSelector(@selector(setBackgroundColor:))]];        }        //...依次重写处理UILabel的其他所有属性    }    if ([self isKindOfClass:[UIButton class]]) {        UIButton *obj = (UIButton *)self;        if (skinMap[NSStringFromSelector((@selector(setTitleColor:forState:))]) {            [obj setTitleColor:skinMap[NSStringFromSelector(@selector(setTitleColor:forState:))] forState:UIControlStateNormal];        }        //...依次重写处理UIButton的其他所有属性    }    //if([self isKindOfClass:[UIImageView class]]){}    //...依次重写处理其他所有UI组件}@end  //换肤设置示例[UILabel new].skinMap = @{NSStringFromSelector(@selector(setTextColor:)):@"文本颜色",                          NSStringFromSelector(@selector(setBackgroundColor:)):@"背景颜色"};

@implementation NSObject (Skin)- (void)CJSkinInvokeMethodForSelector:(SEL)aSelector withArguments:(NSArray *)params {    // 1、 判断是否已注册监听换肤通知    if (!_registerSkinNotic) {        // 注册监听换肤通知        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(skinChanged:) name:kSkinDidChangeNotification object:nil];    }    // 2、存储当前方法缓存    [self cacheParams:params forSelector:aSelector];    // 3、 转发原本的属性设置方法    [self performSelector:aSelector params:params];}- (void)performSelector:(SEL)aSelector withParams:(NSArray *)params {    // 使用NSInvocation进行方法转发    NSInvocation *inv = [NSInvocation invocationWithMethodSignature:[self methodSignatureForSelector:aSelector]];    [inv setTarget:self];    [inv setSelector:aSelector];    [inv setArgument:&params atIndex:index];    [inv invoke];}- (void)skinChanged:(NSDictionary *)notic {    for (NSString *selName in [self.cachedMethods allKeys]){        NSArray *params = self.cachedMethods[selName];        [self performSelector:NSSelectorFromString(selName) params:params];    }}@end  //换肤设置示例[[UILabel new] CJSkinInvokeMethodForSelector:@selector(setBackgroundColor:) withArguments:@[[SkinManager colorWithKey:key]]];

//从当前皮肤包，快速获取颜色FOUNDATION_EXPORT UIColor* SkinColor(NSString *key);//从当前皮肤包，快速获取图片（只能获取本地图片）FOUNDATION_EXPORT UIImage* SkinImage(NSString *key);//从当前皮肤包，快速获取字体FOUNDATION_EXPORT UIFont* SkinFont(NSString *key);/** 快速获取皮肤资源，颜色转换工具类实例 */FOUNDATION_EXPORT CJSkinTool* SkinColorTool(NSString *key);/** 快速获取皮肤资源，图片转换工具类实例 */FOUNDATION_EXPORT CJSkinTool* SkinImageTool(NSString *key);/** 快速获取皮肤资源，字体转换工具类实例 */FOUNDATION_EXPORT CJSkinTool* SkinFontTool(NSString *key);
@interface CJSkinTool : NSObject/**皮肤资源key */@property (nonatomic, copy, readonly) NSString *key;/**皮肤资源类型 0颜色，1图片，2字体 */@property (nonatomic, assign, readonly) CJSkinValueType valueType;/** 从当前皮肤包初始化皮肤资源的实例方法 @param key 皮肤值的key @param type 皮肤值的类型 @return CJSkinTool */+ (CJSkinTool *)skinToolWithKey:(NSString *)key type:(CJSkinValueType)type;
/** 获取皮肤资源 @return UIColor、UIImage或者UIFont */- (id)skinValue;@end

UIButton *button = [UIButton new];button.backgroundColor = SkinColor(@"背景色");[button setImage:SkinImage(@"按钮") forState:UIControlStateNormal];button.titleLabel.font = SkinFont(@"标题");

   UIButton *button = [UIButton new];       [button CJSkinInvokeMethodForSelector:@selector(setBackgroundColor:) withArguments:@[SkinColorTool(@"背景色")]];       [button CJSkinInvokeMethodForSelector:@selector(setImage:forState:) withArguments:@[SkinImageTool(@"按钮"),@(UIControlStateNormal)]];       [button.titleLabel CJSkinInvokeMethodForSelector:@selector(setFont:) withArguments:@[SkinFontTool(@"标题")]];

   UIButton *button = [UIButton new];   //设置点击图片   //[button setImage:image forState:UIControlStateNormal];       [button CJSkinInvokeMethodForSelector:@selector(setImage:forState:) withArguments:@[SkinImageTool(@"按钮"),@(UIControlStateNormal)]];       [button CJSkinInvokeMethodForSelector:@selector(setImage:forState:) withArguments:@[SkinImageTool(@"按钮高亮"),@(UIControlStateHighlighted)]];

   @interface NSObject (Skin)   @property (nonatomic, copy) void(^skinChangeBlock)(id weakSelf);   @end   @implementation NSObject (ZWTSkin)   static void *kSkinChangeBlockKey;   - (void)setSkinChangeBlock:(void (^)(id))skinChangeBlock {       objc_setAssociatedObject(self, &kSkinChangeBlockKey, skinChangeBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);       // 判断是否已注册监听换肤通知       if (!_registerSkinNotic) {           // 注册监听换肤通知           [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(skinChanged:) name:kSkinDidChangeNotification object:nil];       }       __weak typeof(self)wSelf = self;       skinChangeBlock(wSelf);   }   - (void (^)(id))skinChangeBlock {       return objc_getAssociatedObject(self, &kSkinChangeBlockKey);   }      - (void)skinChanged:(NSDictionary *)notic {       if (self.skinChangeBlock) {           __weak typeof(self)wSelf = self;           self.skinChangeBlock(wSelf);       }   }   @end        //换肤设置示例   UIButton *button = [UIButton new];   button.skinChangeBlock = ^(UIButton *weakSelf) {       weakSelf.backgroundColor = SkinColor(@"背景色");       [weakSelf setImage:SkinImage(@"按钮") forState:UIControlStateNormal];       [weakSelf setImage:SkinImage(@"按钮高亮") forState:UIControlStateHighlighted];   };