title: How to remove last draw UIBezierPath from view?
body: <p>I am drawing the line on touch using "UIBezierPath" UIBezierPath.</p>
  
  <p>I want to implement the UNDO feature in which when user press on UNDO button then last drawn line should be removed from the screen.</p>
  
  <p>How can i do this? I have used "removeAllPoints" function of "UIBezierPath" but it doesn't work.</p>