Open Radar

 
Summary:
Lets assume two UIViewControllers hierarchically managed by a UINavigatioController and both were pushed into the stack. Now, if the device orientation changes to landscape and the top view controller is popped, on viewWillDisappear: accessing the sefl.navigationController property will return a nil value.

This is not the case when accessing self.navigationController if the orientation is portrait.


Steps to Reproduce:
0. Using the NavBar sample code attached to this report, run the app in device or simulator;
1. Select View 1;
2. Rotate device or the simulator to landscape;
3. Hit the NavBar back button to pop the view controller.


Expected Results:
In Xcode's Console window, the last log entry, should display something like -[PageOneViewController viewWillDisappear:] - <UINavigationController: 0xd19230> indicating that the self.navigationController property isn't returning nil.


Actual Results:
In Xcode's Console window, the last log entry displays "[PageOneViewController viewWillDisappear:] - (null)" indicating that the self.navigationController property is returning nil.


Regression:
This is not the case when device orientation is portrait, so I'd expect the same to happen in landscape. 

Also, if I did not misunderstood the documentation, it backs up this behaviour by saying that the property returns the navigation controller as long as the view controller is in the stack. I guess one can assume the view controller is still in the stack at the time of viewWillDisappear:, as opposed to viewDidDisappear:.

'NavBar.zip' was successfully uploaded