Restore pre-iOS7 UINavigationController pushViewCo

Question

So. Just started transitioning my IOS code to IOS7, and ran into a bit of problem.

I've got a UINavigationController, which has child ViewControllers and I'm using pushViewController to display the next views. To create a parallax animation with a set of images, if customized the UINavigationController to animate a set of UIImageViews and my child ViewControllers all have a self.backgroundColor = [UIColor clearColor], transparency.

Since iOS7, the way the UINavController animates it child vc's, is updated, by partially moving the current view controller and on top pushing the new viewcontroller, my parallax animation looks crap. I see the previous VC move a bit and then disappear. Is there any way I can restore the previous UINavigationController pushViewController animation? I can't seem to find this in the code.

WelcomeLoginViewController* welcomeLoginViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"WelcomeLogin"];
    [self.navigationController pushViewController:welcomeLoginViewController animated:YES];    

Even tried using:

    [UIView animateWithDuration:0.75
                     animations:^{
                         [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
                         [self.navigationController pushViewController:welcomeLoginViewController animated:NO];
                         [UIView setAnimationTransition:<specific_animation_form> forView:self.navigationController.view cache:NO];
                     }];

Does anyone have any clue?

Answer 1

I have the same problem with clear background colors and crappy animations, so I create custom transitioning for ViewController with new iOS7 API. All you need is simply set a delegate for your navigation controller:

// NavigationController does not retain delegate, so you should hold it.
self.navigationController.delegate = self.navigationTransitioningDelegate;

Just add this files into your project: MGNavigationTransitioningDelegate.

Answer 2

Thanks guys for the feedback. Found a solution in completely recreating the UINavigationController's behavior. When I was nearly finished I ran into Nick Lockwood's solution:

https://github.com/nicklockwood/OSNavigationController

OSNavigationController is a open source re-implementation of UINavigationController. It currently features only a subset of the functionality of UINavigationController, but the long-term aim is to replicate 100% of the features.

OSNavigationController is not really intended to be used as-is. The idea is that you can fork it and then easily customize its appearance and behaviour to suit any special requirements that your app may have. Customizing OSNavigationController is much simpler than trying to customize UINavigationController due to the fact that the code is open and you don't need to worry about private methods, undocumented behavior, or implementation changes between versions.

By overriding my UINavigationController with his code, I was able to work with background images in UINavigationcontrollers

Thanks!

Answer 3

Apparently in iOS7 there's a new way define your own custom UIViewController transitions. Look in the docs for UIViewControllerTransitioningDelegate. Also, here's a link to an article about it: http://www.doubleencore.com/2013/09/ios-7-custom-transitions/