ios - 覆盖 touchesBegan

Question

我目前正在使用 swift 开发一个 iOS 应用程序。我使用 override 编写了我自己的 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。是否还有其他人遇到此问题或有人知道发生了什么事吗？

这是我遇到问题时使用的代码。它是 UIButton 的子类。

Answer 1

如果您重写任何触摸方法，您应该重写所有四个和调用 super。

-(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
}