let tap = UITapGestureRecognizer.init(target: self, action: #selector(kongBaiClick))
tap.delegate = self
self.view.addGestureRecognizer(tap)
//点击手势对应的方法
func kongBaiClick(){
self.view.endEditing(true)
UIView.animate(withDuration: 0.4, animations: {
self.view.frame.origin.y = 0
})
}
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