What if you issue the back programatically and then scroll up? It would be interesting to see just what gets unwired here.
Have you set an exception breakpoint to tell you exactly what is breaking? On May 20, 2015, at 12:46 AM, Luther Baker wrote: > I've got a simple iOS project consisting of 2 collection view controllers > and a navigation controller. > > Tapping any item in the first collection view simply pushes the second > collection view on the stack. > > Problem is, when I tap "< Back" and then manually scroll up ... the app > crashes with a EXC_BAD_ACCESS error in main. > > Nothing is logged ... and the stack in the thread looks something like > > 0 objc_msgSend > 16 UIApplicationMain > 17 main > 18 start > 19 start > > with 17 main highlighted. > > ///// > > In the code, FirstViewController and SecondViewController are almost > identical save for one line. I am specifically looking at what line 24 in > SecondViewController does to the push transition. > > self.useLayoutToLayoutNavigationTransitions = YES; > > Upon running, the collection view "push" animation looks fine - and the "< > Back" button actually works ... but once I get back to FirstViewController, > the original colors never come back. In addition, when I scroll up, I get > the error listed above. > > I've thrown together a small project to demonstrate: > https://github.com/LutherBaker/CollectionViewDemo > > Thoughts? It feels like I'm not referencing something I should be ... > > Thanks, > -Luther > > PS: I think you may ignore this but note that when you initially select an > item in the FirstViewController and "push" - the console spits lots and > lots of > > *Snapshotting a view that has not been rendered results in an empty > snapshot. Ensure your view has been rendered at least once before > snapshotting or snapshot after screen updates.* > which I assume is simply a bug or non-relevant logging accidentally left in > the framework. > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/zav%40mac.com > > This email sent to z...@mac.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
