[Move Screen on Keyboard Show] How to move the screen to keep the input visible when the keyboard opens. #xamarin #ui #ux #ios

moveKeyboard.cs

// listen to keyboards events
NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillShowNotification, OnKeyboardNotification);
NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillHideNotification, OnKeyboardNotification);

// reposition the view
void OnKeyboardNotification(NSNotification notification) {
  var visible = notification.Name == UIKeyboard.WillShowNotification;
  var location = _origin.Location;
        if (visible) {
            var keyboardFrame = UIKeyboard.FrameEndFromNotification(notification);
            var field = this.FirstResponder();
            if (field != null && field.Superview.Frame.GetMidY() > Frame.Height * 0.5f)
              location.Y -= keyboardFrame.Height * 0.5f;
        }
  else location = _origin.Location;
  Frame = new CGRect(location, Frame.Size);
}