【Swift 2.1】爲 UIView 添加點擊事件和點擊效果

 

前言ide

  UIView 不像 UIButton 加了點擊事件就會有點擊效果,體驗要差很多,這裏分別經過自定義和擴展來實現相似 UIButton 的效果。ui

 

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正文code

  1、爲 UIView 添加點擊事件blog

extension UIView {

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

}

 

 

  2、爲 UIView 添加點擊效果事件

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()
        })
    }
}

    這裏你們能夠換成本身的點擊效果,若是是 UIImageView 能夠換成點擊變動透明度。get

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