title: Animating CALayer in IKImageBrowserCell
body: <p>I've got a custom image browser view with IKImageBrowserCell subclass where I've added a little sign graphic that I would like to animate on some occasions.</p>
  
  <p>It's kind of like the "i" sign on Panic's Coda Sites view (which I'm guessing is an ImageBrowserView customized.. right?). On Coda's sites view, if you hover on a project the little i fades in and goes away when you hover out.</p>
  
  <p>Trying to reproduce that effect, and i'm struggling.</p>
  
  <p>I've subclassed IKImageBrowserCell and I'm saving a reference to the sign's layer during layerForType..</p>
  
  <p>Then when the mouse goes over i'm trying to change the opacity but it's not changing.</p>
  
  <p>The hover detection code itself works, I know from NSLogs but the implicit animation of CALayer (signLayer.opacity = 1.0) never kicks in.</p>
  
  <p>Any suggestion?</p>
  
  <p>Maybe I'm missing something (kinda new to Core Animation).</p>
  
  <p>Thanks</p>