ipad development, controls the size of the screen adaptation flip

Will, ipad development, flip screen support in all directions, how to solve the problem of screen adaptation, add this function
- (BOOL) shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation) interfaceOrientation
{
return YES;
}

Support each direction of rotation, but when the specific direction of rotation to a certain, it will call the function? I think that adjust the picture size in the corresponding function and
Position, I do not know that okay? Feeling a little cumbersome, there is no better way, thank you!
Reply:

 
- (Void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) toInterfaceOrientation duration: (NSTimeInterval) duration {
if (toInterfaceOrientation == UIInterfaceOrientationPortrait | | toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) 
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