Intersoft Community - Crosslight - Navigation Bar on iOS Gets Corrupted using NavigationService

Navigation Bar on iOS Gets Corrupted using NavigationService

handy@intersoftpt.com — Wed, 26 Mar 2014 03:43:43 GMT

Thank you for sharing your resources. It was really helpful and our developer team also agreed with your research.

Regards,
Handy

Navigation Bar on iOS Gets Corrupted using NavigationService

dfugaban@silentpartnersoft.com — Mon, 24 Mar 2014 10:31:55 GMT

Hi Guys,

I think we found the issue for this. The root cause of this issue is that, for every asynchronous operation we keep adding or hooking up the Completed event without removing it in the process. In return, any process invoking the navigation service from within the completed event causing the navigation bar to get corrupted as shown on the debug log from our first post.

I am attaching a link here for your reference. Hope this helps.

Many thanks!

Navigation Bar on iOS Gets Corrupted using NavigationService

handy@intersoftpt.com — Fri, 21 Mar 2014 00:07:24 GMT

Hello Domingo,

Thank you for the detail. The issue is under investigation. I would back to you as soon as we got the result from our developer.

Regards,
Handy

Navigation Bar on iOS Gets Corrupted using NavigationService

dsfugabanjr — Wed, 19 Mar 2014 12:46:07 GMT

Here, I thought this might be related to this issue. But that's xcode, so...

2014-03-19 11:37:05.398 Mercury[6580:a07] nested push animation can result in corrupted navigation bar2014-03-19 11:37:05.820 Mercury[6580:a07] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2014-03-19 11:37:05.821 Mercury[6580:a07] Unbalanced calls to begin/end appearance transitions for <UINavigationController: 0x1b5747d0>.

http://stackoverflow.com/questions/8224366/unbalanced-calls-to-begin-end-appearance-transitions-warning-when-push-a-view/11080929

Navigation Bar on iOS Gets Corrupted using NavigationService

dsfugabanjr — Wed, 19 Mar 2014 10:29:48 GMT

Hi Handy,

Thanks for responding. However, as much as we would love to provide our solution to this forum, we just can't. Understand that we are implementing this on a live source code and is currently connected to an enterprise database. Creating a sample as complex as the navigation we have stated below will take most of our time, and we are currently in a tight schedule.

But, to give further information... these contexts are contained within a UITabBarController with EnsureNavigationContext property set to true. Furthermore, we are using the code snippet "this.NavigationService.Close(new NavigationResult(NavigationResultAction.Done));" after an asynchronous operation has been completed on page/view E.

Going back and forth from A to D view models are okay, but once view model is closed, that's where the problem occurs. I have attached the viewmodel and viewcontroller used in E. Please check it out.

Navigation Bar on iOS Gets Corrupted using NavigationService

handy@intersoftpt.com — Tue, 18 Mar 2014 23:30:30 GMT

Hello Domingo,

Can you help us in providing the sample that simulates this issue? We need this to understand your issue issue deeply.

Regards,
Handy

Navigation Bar on iOS Gets Corrupted using NavigationService

dsfugabanjr — Tue, 18 Mar 2014 19:02:25 GMT

Hi,

Our previous issues haven't been solved, and yet another issue is being experienced by our team with the NavigationService from Crosslight. Here's the output being thrown when in debug mode.

2014-03-18 17:14:56.533 xxxxxx[2582:70b] nested pop animation can result in corrupted navigation bar
2014-03-18 17:14:56.911 xxxxxx[2582:70b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

THis issue occurs when closing one of the UIFormViewController at the end of the navigation stack. Here's the navigation sequence : A.) ListViewModeBase > B.) ListeViewModelBase > C.) EditorViewModelBase > D.) ListViewModelBase > E.) EditorViewModelBase

Once "E.) EditorViewModelBase" is closed, then you go back until "B.) ListViewModeBase", that's when the navigation bar gets corrupted. There are instances where the same page is loaded for every backward navigation. Here's the code that we are using to close the view:

this.NavigationService.Close(new NavigationResult(NavigationResultAction.Done));