title: Draw shape according to the pre-defined paths by touch in iOS4 SDK
body: <p>I was trying to make an iPhone app which asks players to draw line according to the red dotted line as illustrated in the image using <code>SINGLE TOUCH</code>. My question is: <strong>How to check whether the user has complete the path ( need not to be accurate ) ?</strong> p.s. I'm using iOS4 SDK</p>
  
  <p><img src="https://i.stack.imgur.com/Lxrh0.jpg" alt="what I&#39;m trying to do, illustrated"></p>