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    <p>Do you have a containerView? Something that can be there so you can add and remove subviews from it? Animation can break if you have two viewControllers, one coming and one going, without a containerView. I use a rootViewController and animate all my pages to and from each other with the rootViewcontroller in the back. Here is my code for flipping, you'll probably have to do a little editing to make it work for you:</p> <p>(keep in mind that self is the rootViewcontroller, a viewcontroller with a blank view (color it so it matches your views))</p> <pre><code>- (void)switchTwoViews:(UIViewController *)view1 otherView:(UIViewController *)view2 { /* This method is called to switch views. It flips the displayed view from the main view to the flipside view and vice-versa. */ UIViewController *coming = nil; UIViewController *going = nil; UIViewAnimationTransition transition; [view1.view setUserInteractionEnabled: NO]; [view2.view setUserInteractionEnabled: NO]; if (view1.view.superview == nil) { coming = view1; going = view2; transition = UIViewAnimationTransitionFlipFromLeft; } else { coming = view2; going = view1; transition = UIViewAnimationTransitionFlipFromRight; } // in some cases the following is needed to size the view // coming.view.frame = [UIScreen mainScreen].applicationFrame; // going.view.alpha = 1.0; //uncomment these lines if we want fading of views // coming.view.alpha = 0.0; NSArray *viewArray = [[NSArray alloc] initWithObjects:coming, going, nil]; [coming viewWillAppear:YES]; [going viewWillDisappear:YES]; [UIView beginAnimations:@"View Flip" context:viewArray]; { [UIView setAnimationDuration:1.0]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(animationDidEnd:finished:context:)]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; // coming.view.alpha = 1.0; //uncomment these lines if we want fading of views // going.view.alpha = 0.0; [UIView setAnimationTransition:transition forView:self.view cache:YES]; [self.view addSubview: coming.view]; } [UIView commitAnimations]; } - (void) animationDidEnd:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context { NSArray *viewArray = context; [((UIViewController *)[viewArray objectAtIndex:1]).view removeFromSuperview]; [[viewArray objectAtIndex:1] viewDidDisappear:YES]; [[viewArray objectAtIndex:0] viewDidAppear:YES]; [[[viewArray objectAtIndex:0] view] setUserInteractionEnabled: YES]; [viewArray release]; } </code></pre>
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    1. POWhy no animation in PageControl project?
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    1. USmahboudz
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    1. POWhy no animation in PageControl project?
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    1. COI have it flipping now except for when I come back to the parent view. I'm doing this from the flip view [self.view removeFromSuperview]. Whereas you are doing this [self.view addSubview: coming.view]. My code is causing it to not animate upon returning to the parent.
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    2. COI also can't use the animationDidEnd: code since that causes my flipped view to disappear.
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    3. COIf you called BeginAnimation and not animationDidEnd, then the calls after beginAnimation are queued up and haven't happened yet. Not a good state to leave things. When flipping a view, one view is added, the other is removed. If you don't remove it, then it stays behind your view, and you will have problems flipping back to it (at least with the above code). Keep playing with these routines until you learn what's going on. Once you've mastered you might find other ways to do it too.
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