Textfield cover keyboard

When design user interface, if your TextField too low, keyboard show can cover TextField.
To make TextField auto scroll up, we put it in a ScrollView name Sc, add these functions in to above last close bracket.

func keyboardShow(n:NSNotification) {

        let d = n.userInfo!

        var r = (d[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()

        r = self.sc.convertRect(r, fromView:nil)

        self.sc.contentInset.bottom = r.size.height+50

        self.sc.scrollIndicatorInsets.bottom = r.size.height

    }

   

    func keyboardHide(sender: NSNotification!)

    {

        sc.setContentOffset(CGPointMake(0, 0), animated: false)

    }

Add these lines to below super.viewDidLoad().

NSNotificationCenter.defaultCenter().addObserver(

            self, selector: #selector(keyboardShow),

            name: UIKeyboardWillShowNotification, object: nil)

        NSNotificationCenter.defaultCenter().addObserver(

            self, selector: #selector(ViewController.keyboardHide(_:)),

            name: UIKeyboardWillHideNotification, object: nil)

Now when you touch finger to TextField, it auto scroll up.