Swift 2.1 为 UIView 添加点击事件和点击效果

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

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

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。