Simulating UINavigation push issues?

I have two views in one XIB I want to switch, but I don't want to use a UINavigationController for this, because it's horribly inefficient because there开发者_StackOverflow中文版 is only one transition that will need to occur. Here's my code:

// get the view that's currently showing
UIView *currentView = self.view;
// get the the underlying UIWindow, or the view containing the current view view
UIView *theWindow = [currentView superview];

// set up an animation for the transition between the views
CATransition *animation = [CATransition animation];
[animation setDuration:0.5];
[animation setType:kCATransitionPush];
[animation setSubtype:kCATransitionFromLeft];
[animation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];

[theWindow addSubview:webViewTwo];

[[theWindow layer] addAnimation:animation forKey:@"SwitchToView1"];

.h

@class WebViewTwo;
@interface SecondViewController : UIViewController {
IBOutlet WebViewTwo *webViewTwo;
}

Now it's crashing with an error

2011-05-12 16:59:59.528 TableView[36627:207] -[WebViewTwo superview]: unrecognized selector sent to instance 0x603b660
2011-05-12 16:59:59.531 TableView[36627:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[WebViewTwo superview]: unrecognized selector sent to instance 0x603b660'

Please help! Thanks.

The error would tend suggest that either WebViewTwo is not a subclass of UIView or has perviously been released and is no longer pointing to an object that is subclass of UIView. Check the header file where you define WebViewTwo and perhaps add NSLog(@"%@", webViewTwo); before you add it as a subview just to see what type it is.

Hope this helps.