Custon UISlider with non rectangular area
<p>I would like to customize my UISlider like this screenshot :</p>

<p><img src="http://img3.imageshack.us/img3/7707/sliderp.png" alt="alt text"></p>

<p>I'm using setMinimumTrackImage and setMaximumTrackImage method with a non strechable image but it doesn't work. </p>

<p>The image is stretched and proportion are kept.</p>

<p>Any idea ?</p>

<p>Thanks.</p>

<p>Thierry</p>
