title: how to 'animate' changing shape of a view in IOS? (i.e. change it's path from one to another)
body: <p>How can one 'animate' changing a custom UIView based around a shape, from one shape to another shape?  </p>
  
  <p>Say for example one is creating a UIView that appears like a shape, created using a UIBezierPath.  But then you want this view object to change in an 'animated' style from custom shape 1 to custom shape 2?   So I could create two separate paths using UIBezierPath to represent the two shapes, but I'm unclear how to 'animate' moving from one to another?  </p>
  
  <p>Not sure also if 'animate' is the correct term here. For example if this is inherently un-animatable then perhaps I mean 'visually morphing' the view of the object from one to another.  </p>
  
  <p>I'm reading up on these but still not quite seeing how: UIBezierPath, CAShapeLayer, CADisplayLink, </p>