change device orientation compatible for ios6 and ios5

change device orientation compatible for ios6 and ios5

I NEED: rotate device programmatically from portrait to landscape
compatible for iOS6 and iOS5. THE PROBLEM: I cannot use [UIDevice
setOrientation] function on ios6.
WHAT I HAVE: the code for iOS6:
- (BOOL) shouldAutorotate
{
return YES;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationLandscapeLeft;
}
the code for iOS5:
-
(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
So, I need write the code that rotate on iOS5:
-(void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated];
// [[UIDevice currentDevice] setOrientation] - I cannot use it
// ???
}