title: How do you build an NSURL for an image in Image.xcassets?
body: <p>The easiest way to load a local <code>UIImage</code> asset is of course to use <code>+[UIImage imageNamed]</code> but for my case, I want to supply a <code>NSURL *</code>. How do I get a <code>NSURL *</code> for local file?</p>