title: How can I draw a sector with radial gradient (iphone)
body: <p>How can I draw a sector (filled arc) with radial gradient in objective c (Core Graphics)
  I use </p>
  
  <pre><code>CGContextDrawRadialGradient
  </code></pre>
  
  <p>but it draws circle.
  It will be good if you say me how to fill any shape by radial gradient. Thanks</p>