swift2 语法 语法 判断键盘高度

语法2.2

NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(MusicViewController.keyboardWasShown(_:)), name: UIKeyboardDidShowNotification, object: nil)

语法2.0

  NSNotificationCenter.defaultCenter().addObserver(self, selector:      "keyboardWillDisappear:", name:UIKeyboardWillHideNotification, object: nil)



    func keyboardWasShown(notification: NSNotification) {

  // 获取键盘信息
  let keyboardinfo = notification.userInfo![UIKeyboardFrameBeginUserInfoKey]

  let keyboardheight:CGFloat = (keyboardinfo?.CGRectValue.size.height)!

  print("键盘弹起")

  print(keyboardheight)

}

func keyboardWillDisappear(notification:NSNotification){

  print("键盘落下")

}