How to autorotate from portrait to landscape mode?

Question

How can I autorotate an image from portrait to landscape mode on the IPhone?

Answer 1

Apply proper transformation to the view and adjust its frame bounds

In my app I've done it this way (very likely not the best one):

[UIView beginAnimations:@"View Flip" context:nil];
[UIView setAnimationDuration: 0.5f];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

self.view.transform = CGAffineTransformIdentity;
self.view.transform = CGAffineTransformMakeRotation(-M_PI/2);
self.view.bounds = CGRectMake(0.0f, 0.0f, 480.0f, 320.0f);

self.view.center = CGPointMake(160.0f, 240.0f);
[UIView commitAnimations];