The code below works fine in iOS 4 and 5 but crashes in iOS 6 with EXC_BAD_ACCESS
. I'd appreciate any help in troubleshooting it. This code is being called in a UITableViewController
that handles my app's search logic:
CATransition *transition = [CATransition animation];
transition.duration = 0.3f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
transition.type = kCATransitionFade;
[self.navigationController.view.layer addAnimation:transition forKey:nil];
[self.navigationController popViewControllerAnimated:NO];
The way I add the tableView
is similar and doesn't crash when called:
SearchTVC *searchTable = [[SearchTVC alloc] init];
searchTable.detailViewController = self.detailViewController;
CATransition *transition = [CATransition animation];
transition.duration = 0.3f;
transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
transition.type = kCATransitionFade;
[self.navigationController.view.layer addAnimation:transition forKey:nil];
[self.navigationController pushViewController:searchTable animated:NO];
What could be the problem?
*EDIT
Interestingly the crash doesn't occur if I use [self.navigationController popViewControllerAnimated:YES];
(YES
rather than NO
). But of course this defeats the purpose of using a custom pop animation.
Check whether you have a line like the following somewhere in your view controller code:
self.navigationController.delegate=self;
If so, then you must set it back
self.navigationController.delegate=nil;
before you say
[self.navigationController popViewControllerAnimated:YES];
Otherwise, popViewControllerAnimated
will first deallocate the delegate and then try to call it - resulting in a crash.
I know my question was vague, but I didn't have much else to go off of. I knew the line [self.navigationController popViewControllerAnimated:NO];
was the problem but I couldn't figure out why. Then I came across this question and the first answer suggested I make my search table an instance variable rather than creating a new one every time I want to present it, and that actually worked. It must be a memory issue that I can't wrap my head around.
tl;dr :
Make sure the UIViewController
that's being pushed and popped is an instance variable.
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