iOS AddressBookUI - 'Shouldn't be trying to show more than one Add to Existing Contact people picker.'

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I'm trying add some addressbook functionality to my app, but after tap the second time to the 'Add to existing' button I get this error message.

* Assertion failure in -[ABPersonViewControllerHelper presentPeoplePickerNavigationControllerForAddToContacts:], /SourceCache/AddressBookUI_Sim/AddressBookUI-1118/ABPersonViewControllerHelper.m:2574 2011-10-24 20:41:11.960 locato[4576:11603] Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Shouldn't be trying to show more than one Add to Existing Contact people picker.' First throw call stack: (0x152e052 0x16bfd0a 0x14d6a78 0xefd2db 0x9d674 0x152fe72 0xd0eb8 0xc8141 0xb9e2f 0x60471d 0x604952 0xe8c86d 0x1502966 0x1502407 0x14657c0 0x1464db4 0x1464ccb 0x17eb879 0x17eb93e 0x574a9b 0x22d9 0x2255) terminate called throwing an exception

I have a viewcontroller and a navigationcontroller, and im displaying the addressbook's 'modal' views on the main viewcontroller. (or else im not getting the sliding transition, and this error.). I have overridden these methods:

 @implementation UIViewController (cancelButton)
- (void)peoplePickerNavigationControllerDidCancel:(ABPeoplePickerNavigationController *)peoplePicker;
{
    UIResponder *responder = self;
    while (responder && ![responder isKindOfClass:[mainViewController class]]) {
        responder = [responder nextResponder];
    }

    [(UIViewController *)responder dismissModalViewControllerAnimated:YES];

}
@end

@implementation UINavigationController (modal)
- (void) presentModalViewController:(UIViewController *)screen animated:(BOOL)animated 
{
    UIResponder *responder = self;
    while (responder && ![responder isKindOfClass:[mainViewController class]]) {
        responder = [responder nextResponder];
    }
    if ([screen isKindOfClass:[ABPeoplePickerNavigationController class]]) {
        ABPeoplePickerNavigationController *scr = screen;
        scr.peoplePickerDelegate = self;
       [scr release];
    }
    [(UIViewController *)responder presentModalViewController:screen animated:YES];
}

Im hoping to get some clarification on what im not doing right!

thanks, David

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3
ott-- On

Two things you could change before trying again:

  • after both while loops, check that responder is not nil before doing dismiss or present a viewcontroller

  • can't you just assign screen.peoplePickerDelegate = self; instead of using this scr?