在swift2.0中使用UIKeyboard进行UIStackview

Question

我正在使用带有swift2.0的iOS9。我的视图控制器处理两个文本字段和一些标签。这两个文本字段包含在stackview中，标签还包含在另一个stackview中。我已经设置了通用应用程序，包括纵向和横向选项，它的工作原理好吧。但是当我点击文本字段然后键盘就在那时键盘覆盖文本字段，所以我看不到文本字段数据。如何解决这个问题以及如何管理键盘上下的所有约束？

override func viewWillAppear(animated: Bool) {

    super.viewWillAppear(animated)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object:nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector:("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)

}
override func viewWillDisappear(animated: Bool) {

    super.viewWillDisappear(animated)
    NSNotificationCenter.defaultCenter().removeObserver(self)
}

func keyboardWillShow(notification:NSNotification){

    print("keyboardWillShow")
    var info = notification.userInfo!
    let keyboardFrame:CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
    print(keyboardFrame)
    UIView.animateWithDuration(0.1, animations: { () -> Void in

    })
}

func keyboardWillHide(notification:NSNotification){

      print("keyboardWillHide")

}

Answer 1

func keyboardWillShow(sender: NSNotification){

    var info = sender.userInfo!
    let keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()


    UIView.animateWithDuration(0.1, animations: { () -> Void in

        self.view.center.y = self.view.center.y - keyboardFrame.size.height
    })


}
func keyboardWillHide(sender: NSNotification){

    var info = sender.userInfo!
    let keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()

    UIView.animateWithDuration(0.1, animations: { () -> Void in
        self.view.center.y = self.view.center.y + keyboardFrame.size.height
    })

}