IOS development: Strange effect during flip horizonal modal
<p>
I've encountered a strange situation that during the flip transition(UIModalTransitionStyleFlipHorizontal) between views the iphone desktop appeared as the background. I can even see app and icons on my iphone when the view is flipping into another.
</p>

<p>Is it due to the improper management of memory or not correctly customized settings?</p>
