title: Xcode iOS - Rotate/scale UIImageView with an "anchor" at top right?
body: <p>I am building an image editing program that places "stamps" over images.</p>
  
  <p>I've successfully added image views as stamps to a photo and can re-position/scale/rotate these stamps (image views) using pinch gesture recognizers. </p>
  
  <p>However when the stamp gets too small, it becomes impossible to fit two fingers over the stamp to resize or rotate.</p>
  
  <p>I've noticed similar types of apps use some sort of "anchor" or icon at the top-right corner of the stamp's frame that you can drag with one finger that achieves this same scale/rotate effect (as opposed to using pinching gestures).</p>
  
  <p>Is there a specific term for this "anchor" or a term for this kind of scale/rotate procedure? I'm having trouble searching for help on this particular kind of feature.</p>
  
  <p>If anyone might know of any prebuilt classes or links to pages describing how to implement this kind of feature, that would be a huge help!</p>
  
  <p>I am attaching an animated GIF to help illustrate what I am trying to implement.</p>
  
  <p>Thanks!</p>
  
  <p><a href="https://i.stack.imgur.com/lS5QF.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lS5QF.gif" alt="enter image description here"></a></p>