title: Move cursor/focus on other textfield
body: <p>I've added toolbar to the textfield and also on textfield it can show keyboard or show UIPickerView like on image</p>
  
  <p><a href="https://i.stack.imgur.com/T7N0N.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/T7N0N.png" alt="enter image description here"></a></p>
  
  <p>How to move cursor/focus from on textfield to other textField programmatically(Next, and Back buttons on Toolbar)?</p>
  
  <p>P.S. I know how to call the method(set selector when adding UIBarButtonItem to Tool). I just need the code for moving the focus/cursor</p>