BlocksKit UITapGestureRecognizer

BlocksKit UITapGestureRecognizer

按钮绑定

// button 点击事件绑定
btn.btn.bk_(whenTapped: {  
    print("----")
})

添加Tap手势

// 单次点击
- (void)bk_whenTapped:(void (^)(void))block
{
    [self bk_whenTouches:1 tapped:1 handler:block];
}
// 点击回调
- (void)bk_whenTouches:(NSUInteger)numberOfTouches tapped:(NSUInteger)numberOfTaps handler:(void (^)(void))block
{
    if (!block) return;
    UITapGestureRecognizer *gesture = [UITapGestureRecognizer bk_recognizerWithHandler:^(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location) {
        if (state == UIGestureRecognizerStateRecognized) block();
    }];
    [self addGestureRecognizer:gesture];
}

bk_recognizerWithHandler

通过对UIGestureRecognizer的分类动态添加

// 添加手势入口
+ (id)bk_recognizerWithHandler:(void (^)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location))block
{
    return [self bk_recognizerWithHandler:block delay:0.0];
}
// 进一步拆分 bk_recognizerWithHandler
+ (id)bk_recognizerWithHandler:(void (^)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location))block delay:(NSTimeInterval)delay
{
    return [[[self class] alloc] bk_initWithHandler:block delay:delay];
}
// 统一初始化入口 bk_initWithHandler
- (id)bk_initWithHandler:(void (^)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location))block delay:(NSTimeInterval)delay
{
    self = [self initWithTarget:self action:@selector(bk_handleAction:)];
    if (!self) return nil;

    self.bk_handler = block;
    self.bk_handlerDelay = delay;

    return self;
}

// bk_handleAction 通过添加的bk_handler变量，点击按钮时，实例化block
- (void)bk_handleAction:(UIGestureRecognizer *)recognizer
{
    
    // bk_handler 通过AssociatedObject关联对象 添加的成员 setter 调用bk_setHandler方法赋值
    /*
    @property (nonatomic, copy, setter = bk_setHandler:) void (^bk_handler)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location);
 
    - (void)bk_setHandler:(void (^)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location))handle {
        objc_setAssociatedObject(self, BKGestureRecognizerBlockKey, handler, OBJC_ASSOCIATION_COPY_NONATOMIC);}
    */
    void (^handler)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location) = recognizer.bk_handler;
    if (!handler) return;
    
    NSTimeInterval delay = self.bk_handlerDelay;
    CGPoint location = [self locationInView:self.view];
    void (^block)(void) = ^{
        if (!self.bk_shouldHandleAction) return;
        handler(self, self.state, location);
    };

    self.bk_shouldHandleAction = YES;

    if (!delay) {
        block();
        return;
    }

    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delay * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), block);
}

bk_handler

// 声明成员变量的引用
// static const void *BKGestureRecognizerBlockKey = &BKGestureRecognizerBlockKey;

// 属性声明
@property (nonatomic, copy, setter = bk_setHandler:) void (^bk_handler)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location);

// setter方法
- (void)bk_setHandler:(void (^)(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location))handler {
    objc_setAssociatedObject(self, BKGestureRecognizerBlockKey, handler, OBJC_ASSOCIATION_COPY_NONATOMIC);
}