UISplitViewController with NavigationControllers (including sample code)

问题

The easiest way to see this problem will be to run the sample project here:

http://drop.io/stackproblem

Basically, It's a uisplitviewcontroller which can be switched between 2 detail views, both of which are navigation controllers.

The problem is that it crashes with the following error:

MultipleDetailViews[8531:207] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Popovers cannot be presented from a view which does not have a window.'

It crashes with this error if you use the app in PORTRAIT and you navigate (still in portrait) from the first controller, to the second, to the first, to the second, and then boom CRASH using the popover controller.

One way to stop the crash is to stop lazy loading the navigation controllers and to load them fresh everytime but this isn't an option for the app I'm making.

Any ideas and I may fall in love.

回答1:

Try using if (self.view.window != nil) just before the line that's causing the crash.

来源：https://stackoverflow.com/questions/3874693/uisplitviewcontroller-with-navigationcontrollers-including-sample-code