Modal Window + NavigationGroup + TableView == Crash

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UPDATE: The window does NOT need to be modal. I have updated app.js to reflect this. I can still reproduce this crash when the window is not modal.

I've been seeing a crash on my device with our project for some time now, but have been unable to determine exactly what's going on. The problem is intermittent, and only affects users occasionally.

I've put together a minimal app which reproduces the problem on my iPhone 3G. You can see the code for app.js (and the associated crashlog) here.

Basically, I'm trying to put up a modal window that contains a NavigationGroup; which in turn contains TableViews; the rows of which contain multiple subviews. You select from an initial list of options, which drills into another list of options. When you select one of these, the modal window is closed.

If you try this code, note that it does not crash on the first open, find, select, close cycle. You must do this a number of times. On my iPhone 3G, it's typically about 10-15 times before you start getting memory warnings, and an eventual crash. There looks to be some infinite recursion going on here, but I'm not able to see exactly where the problem is, or how to fix it. Here's a snippet of the crash (full crashlog at the gist):

Thread 0 Crashed:
0   libobjc.A.dylib                 0x000034ec objc_msgSend + 12
1   UIKit                           0x000099fc -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 44
2   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
3   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
4   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
5   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
6   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
7   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
8   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
9   UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
10  UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
11  UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
12  UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
13  UIKit                           0x00009b04 -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 308
(~500 more lines of this same stack entry)
— asked 2 years ago by Shad Reynolds
3 Comments

  • does it crash if the window is not modal?

    — commented 2 years ago by Aaron Saunders

  • Good question. It appears that it does NOT need to be modal in order to see this problem. I will update my post.

    — commented 2 years ago by Shad Reynolds

  • Interestingly, while I'm still getting the crash, I'm not getting a crash report in my device logs. If I look in my console, I get the console that I'm dropping into the gist. Looks like mostly memory issues. console.log

    — commented 2 years ago by Shad Reynolds

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