hello, I am new to iphone or mac programming. can any one give me a helping hand on the following issue? do u notice any problem in the following pice of code? [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight froView:self.view cache :YES]; I have the following warning: warning 'UIView' may not respond to '+setAnimationTransition:forView:cache:' (Messages without a matching method signature will be assumed to return 'id' and accept....................) and it stops running on this line of code with the following runtime error:_TERMINATING_DUE_TO_UNCAUGHT_EXCEPTION_ tanks