Swift 2.1 为 UIView 添加点击事件和点击效果

时间:2021-10-14 14:39:41

前言

  UIView 不像 UIButton 加了点击事件就会有点击效果,体验要差不少,这里分别通过自定义和扩展来实现类似 UIButton 的效果。

正文

  一、为 UIView 添加点击事件

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extension UIView {
 
  func addOnClickListener(target: AnyObject, action: Selector) {
    let gr = UITapGestureRecognizer(target: target, action: action)
    gr.numberOfTapsRequired = 1
    userInteractionEnabled = true
    addGestureRecognizer(gr)
  }
 
}

        二、为 UIView 添加点击效果

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class UIViewEffect : UIView {
 
  override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    backgroundColor = UIColor.groupTableViewBackgroundColor()
  }
 
  override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {
    UIView.animateWithDuration(0.15, animations: { () -> Void in
      self.backgroundColor = UIColor.clearColor()
    })
  }
 
  override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
    UIView.animateWithDuration(0.15, animations: { () -> Void in
      self.backgroundColor = UIColor.clearColor()
    })
  }
}

 这里大家可以换成自己的点击效果,如果是 UIImageView 可以换成点击变更透明度。