次のコードで警告が発生します。ARCが使用されます。
if ( aAnim ) {
[UIView beginAnimations:nil context:CFBridgingRetain([NSNumber numberWithInt:aOff])];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(postSpin:finished:toCCWCellOffset:)];
}