title: Color filling in Swift
body: <p>Is there a general method to fill an area in Swift.</p>
  
  <p>I have various shape in my UIView, lines, ellipses, curves … etc.
  Those shapes delimit a certain number of areas.
  I want to fill one area in a color (uiColorOne) and another area in another color (uiColorTwo).</p>
  
  <p>Is that possible? If YES, how can I do that?</p>