title: Canvas-like element
body: <p>I'm looking for a "canvas-like" element to use in iOS apps. By "canvas-like" I mean that I want a surface on which I can draw basic shapes such as rectangles, lines, text, or images. I do not need 3D or other really advanced stuff -- rectangles and other images would be enough, text can be stored in images if required.</p>
  
  <p>I can't imagine that no such API is available, but how do they call it?</p>