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iosswiftcgrectkeypad

Swift: View bounces back when raising it for keypad


I am trying to raise the View when a Keypad comes up, but it just bounces back. If I give CGRectOffset a positive value for Y (moving the View down), then it stays.

@IBOutlet weak var PPI: MainTextFields!




    var KbHeight: CGFloat!



    //----------------------------------------------



    func animateTextField(up: Bool) {
        let TFMovement = (up ? -KbHeight : KbHeight)


        UIView.animateWithDuration(0.7, animations: {
            self.view.frame = CGRectOffset(self.view.frame, 0, TFMovement)

        })
    }



    func keyboardWillShow(notification: NSNotification) {
        if let userInfo = notification.userInfo {
            if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
                KbHeight = keyboardSize.height
                self.animateTextField(true)
            }

        }

    }


    func keyboardWillHide(notification: NSNotification) {
        self.animateTextField(false)
    }



    //----------------------------------------------


    // Touch Outside Keypad to leave it
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        self.view.endEditing(true)
    }



    override func viewWillAppear(animated:Bool) {
        super.viewWillAppear(animated)



        // For TextField Movement
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
    }


    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)

        //  For TextField Movement
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }


    override func viewDidLoad() {
        super.viewDidLoad()

        PPI.delegate = self

    }

Am I doing something wrong with the CGRectOffset in the keyboardWillShow function? I am relatively new to Swift and got this from a tutorial, but just doesn't seem to work properly.


Solution

  • It turned out to be because of the Auto-Layout Constraint I had to the Top Margin, so the Constant of that Constraint needed to be changed and the line:

    self.view.frame = CGRectOffset(self.view.frame, 0, TFMovement)
    

    was not needed at all.