How to make a push transition without the obnoxious fade aspect

Question

I see that a view controller can do a push over transition where the new view pushes over the old view; the UIView animations have a push but their implementation adds an obnoxious fade aspect, how is the view controller doing theirs? Must be an undocumented transition code....

Answer 1

Here's an example of the animation I described in my last post:
- (void)pushViewFromRight:(UIViewController*)coming over:(UIViewController*)going {
CGRect frameComing = coming.view.frame;
CGRect frameGoing = going.view.frame;
frameComing.origin.x = 320;
coming.view.frame = frameComing;
if ([coming.view superview] == nil)
[self.view insertSubview:coming.view atIndex:0];
[UIView beginAnimations:@"frame" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
// [UIView setAnimationCurve:UIViewAnimationCurveLinear];
[coming viewWillAppear:YES];
[going viewWillAppear:YES];
frameComing.origin.x = 0;
coming.view.frame = frameComing;
frameGoing.origin.x = -320;
going.view.frame = frameGoing;
[going viewDidDisappear:YES];
[coming viewDidAppear:YES];
[UIView commitAnimations];
I hacked the above from the ViewSwitcher project in Chapter 6 of Mark & LaMarche, btw, in case it looks familiar. It uses insertSubview because there's a tool bar in the root view. I haven't tested when the superview isn't full-screen or in landscape, so don't know how much work is needed for those cases (obviously 320 shouldn't be hard coded).