覆盖touchesBegan

Question

我目前正在开发一个iOS应用程序使用迅速。我使用重写来编写自己的tocuhesBegan和tochesEnded函数。现在当我使用self.button时。

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesBegan(touches, withEvent: event)
    for touch in touches {
        var tap = touch as? UITouch
        var touchPoint: CGPoint = tap!.locationInView(self)
        self.touchDown(touchPoint)
    }
}

override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesEnded(touches, withEvent: event)
    self.releaseTouch()
}

override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) {
    super.touchesCancelled(touches, withEvent: event)
}

override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
    super.touchesMoved(touches, withEvent: event)
}

func touchDown(point: CGPoint){
    if rippleEffect == true {
        touchView.frame = touchViewInitFrame
        self.addSubview(touchView)
        var touchViewFrameXPosition: CGFloat = point.x - (frame.size.width) / 2
        println("X position = \(touchViewFrameXPosition)")
        var touchViewFrameYPosition: CGFloat = -(self.frame.size.width - self.frame.size.height) / 2
        touchViewFrame = CGRectMake(touchViewFrameXPosition, touchViewFrameYPosition, frame.size.width, frame.size.width)
        UIView.animateWithDuration(0.25, delay: 0.0, options: .CurveEaseInOut, animations: {
            self.touchView.frame = self.touchViewFrame
            }, completion: nil)
    }

}

func releaseTouch(){
    if rippleEffect == true {
        UIView.animateWithDuration(0.0, delay: 0.0, options: .CurveEaseInOut, animations: {
            self.touchView.removeFromSuperview()
            }, completion: nil)
    }
}

它不会转到我在选择器中指定的函数。有没有其他人有这个问题，或者有人知道发生了什么事？

这是我在遇到问题时使用的代码。它是UIButton的一个子类。

Answer 1

如果您重写了任何一个触摸方法，那么您应该覆盖所有四个方法并调用超级方法。

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    [super touchesBegan:touches withEvent:event];
    //your code
}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    [super touchesEnded:touches withEvent:event];
    //your code
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    [super touchesMoved:touches withEvent:event];
    //your code
}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
    [super touchesCancelled:touches withEvent:event];
    //your code
}

Answer 2

您的视图和按钮可能有两个不同的句柄，以证明尝试触摸屏幕上的其他任何位置，您的触摸就会被检测到，然而，在按下该按钮时，触摸是句柄，永远不会传递给其他处理程序。在执行所需操作之前/之后，您必须选择、拦截所有消息并处理它是否应该传递给原始句柄，或者实现按钮处理程序并将消息传递到链中：

从苹果的文档来看：

覆盖命中测试确保superview接收所有的触摸，因为通过将自己设置为命中测试视图，superview拦截并接收通常首先传递给子视图的触摸。如果superview不覆盖hitTest:withEvent:，则触摸事件与它们第一次发生的子视图相关联，并且从未发送到superview。