我正在编写一个应用程序，用户必须在文本框中键入单词，然后按一个按钮以查看他们是否输入了正确的单词。当用户点击文本框时，我希望视图向上移动，以便键盘不会阻挡任何内容。我使用以下代码完成此转换，并在键盘解除后返回结果。
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
func keyboardWillShow(sender: NSNotification) {
var info:NSDictionary = sender.userInfo!
var keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
self.view.frame.origin.y -= (keyboardSize.height)
}
func keyboardWillHide(sender: NSNotification) {
var info:NSDictionary = sender.userInfo!
var keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).CGRectValue()
self.view.frame.origin.y += (keyboardSize.height)
}
我遇到的问题是，当用户显示键盘并按下按钮时，键盘将被解除，然后视图会被移动