//MARK:属性列表
var toolBarCons: NSLayoutConstraint?

//MARK:视图生命周期

override func viewDidLoad() {
super.viewDidLoad()

//注册通知
NSNotificationCenter.defaultCenter().addObserver(self,selector: "keyboardChangeAction:",name: UIKeyboardWillChangeFrameNotification,object: nil)
}

override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
//弹出键盘
textView.becomeFirstResponder()
}

deinit{
//移除通知
NSNotificationCenter.defaultCenter().removeObserver(self)
}

//MARK:自定义方法
//通知调用方法
@objc private func keyboardChangeAction(notification: NSNotification){

let keyboardRect = notification.userInfo![UIKeyboardFrameEndUserInfoKey]!.CGRectValue
let duration = notification.userInfo![UIKeyboardAnimationDurationUserInfoKey]!.doubleValue

//取到你自己toolBar的约束

toolBarCons?.constant = -UIScreen.mainScreen().bounds.size.height + keyboardRect.origin.y UIView.animateWithDuration(duration) { () -> Void in self.view.layoutIfNeeded() } } //懒加载 －－ 工具栏 private lazy var toolBar:UIToolbar = { let toolBar = UIToolbar() toolBar.backgroundColor = UIColor(white: 0.8,alpha: 1) return toolBar }()