swift3.0收起键盘

override func viewDidLoad() {

super.viewDidLoad()

let tap = UITapGestureRecognizer(target: self, action: #selector(self.tapOne))

tap.numberOfTapsRequired = 1

self.view.addGestureRecognizer(tap)

}

//收起键盘

@objc func tapOne() {

self.view.endEditing(true)

}