title: Create custom activity indicator in iPhone SDK?
body: <p>I haven't found any references to apps that use a custom activity indicator -- would be an animated GIF old-school -- in place of the Apple-supplied spinning wheels. Are there facilities to do this (or subclass UIActivityIndicatorView), do developers roll their own UIViews, or does this violate HIG?</p>
  
  <p>Thanks, IPD</p>