How do I make a keyboard push the view up when it comes on screen? Xcode Swift

Question

So I have a view with a text field in it, but the text field is at the bottom. When I click the keyboard, it pops up and covers the text field, this is my problem. I was wondering if it is at all possible to push the rest of the view up when a keyboard comes up?

Answer 1

You can register your view controller to be notified when the keyboard is about to be shown, then you push your view up.

class ViewController: UIViewController {

var keyboardAdjusted = false
var lastKeyboardOffset: CGFloat = 0.0

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 viewDidDisappear(animated: Bool) {
    super.viewDidDisappear(animated)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
    NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}

func keyboardWillShow(notification: NSNotification) {
    if keyboardAdjusted == false {
        lastKeyboardOffset = getKeyboardHeight(notification)
        view.frame.origin.y -= lastKeyboardOffset
        keyboardAdjusted = true
    }
}

func keyboardWillHide(notification: NSNotification) {
    if keyboardAdjusted == true {
        view.frame.origin.y += lastKeyboardOffset
        keyboardAdjusted = false
    }
}

func getKeyboardHeight(notification: NSNotification) -> CGFloat {
    let userInfo = notification.userInfo
    let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue
    return keyboardSize.CGRectValue().height
}

}

Answer 2

You can check this tutorial Move UITextField so keyboard does not hide it

You will find demo for this here

Or you can check the answer of this stackoverflow Move textfield when keyboard appears swift

Best answer there is to manage by updating bottom constraint like this

func keyboardWasShown(notification: NSNotification) {
     var info = notification.userInfo!
     var keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()

     UIView.animateWithDuration(0.1, animations: { () -> Void in
       self.bottomConstraint.constant = keyboardFrame.size.height + 20
  })
}

Answer 3

You should put text field into UIScrollView and adjust its contentInset on UIKeyboardDidShowNotification.

Read this help page: https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html#//apple_ref/doc/uid/TP40009542-CH5-SW7