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。