ABPeoplePickerNavigationController crashes while being dismissed in Simulator only - iphone

Question

I get this crash in the simulator only. On a real device it works and debugs fine.
(Therefore it is not too critical but I am working on a presentation for which the simulator comes handy.)
- (BOOL)peoplePickerNavigationController:
(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person {
[self displayPerson:person];
if ([self respondsToSelector:#selector(dismissViewControllerAnimated:completion:)]){
[self dismissViewControllerAnimated:YES completion:nil];
} else {
[self dismissModalViewControllerAnimated:YES];
}
return NO;
}
The crash is on:
[self dismissViewControllerAnimated:YES completion:nil];
All I see is: "Thread 1: EXC_BREAKPOINT (code=EXC_I386_BTP, subcode=0x0)"
There is no specific output in the debug window. Zoombies is enabled. I do ARC. I am using storyboard but I call the ABPersonPicker... programmatically using the following code:
-(void)showPeoplePickerController
{
ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init];
picker.peoplePickerDelegate = self;
if ([self respondsToSelector:#selector(presentViewController:animated:completion:)]) {
[self presentViewController:picker animated:YES completion:nil];
} else {
[self presentModalViewController:picker animated:YES];
}
return;
}
Remember that it is running well on the devices that I have (iPod Touch 4th gen, iPhone 4 and iPhone 4S)

Answer 1

Your problem is that you don't keep a strong reference to the picker. Add a ivar to hold it, then when done in the delegate callback, use a dispatch asyn block on the main queue to nil the ivar out and release it. (Sorry no code entering this from an iPad)
EDIT: look in your showPeoplePickerController method - you create the picker and save it in an automatic which gets released when you exit the method. You want to keep a strong reference to the picker by using an ivar instead of the automatic.
Then you don't want to release the picker in a delegate callback - this often works but will bite you at unexpected times, so you want to release this type of object after the delegate callback is done. In fact I usually set the objects delegate property to nil first if I can then release it with 'picker = nil' . In a block 'picker' gets turned into 'self->picker'. You can also use performSelector:afterDelay:0 too I just prefer blocks.
EDIT2: So what I do in
- (BOOL)peoplePickerNavigationController:shouldContinueAfterSelectingPerson:
is just return NO. I wait until this message:
- (void)peoplePickerNavigationControllerDidCancel:
to dismis it. I also have some other code that pops a an action sheet that confirms saving a selected address and also does a dismiss, but its old code and not sure how it works now. In any case hope this helps.