swift2.0中带有UIKeyboard的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堆栈视图中，标签也包含在另一个堆栈视图中。我已经设置了纵向和横向选项的通用应用程序，它的工作很好。但是当我点击文本字段时，当时键盘是向上的，键盘覆盖了文本字段，所以我看不到文本字段数据。如何解决这个问题以及如何在键盘向上和向下时管理所有约束？

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
    })

}