在呈现ABNewPerson ViewController之后，应用程序不响应触摸

Question

我希望用户能够在联系簿中添加电话号码，因此我添加了以下代码。

我的UITableView实现了ABNewPersonViewControllerDelegate，视图显示正确，并且也正确隐藏。

但是，在弹出ABNewPersonViewController之后，我的原始视图（ABNewPersonViewController所涵盖的视图）不再对触摸作出反应。

任何猜测为什么？它的UIButton对UIControlEventTouchUpInside和UILongPressGestureRecognize事件都没有反应...

- (void)prefilledAddToContactsWith:(NSString*)number
{
    // Create the pre-filled properties
    ABRecordRef newPerson = ABPersonCreate();
    CFErrorRef error = NULL;

    CFStringRef phoneNumberValue = (__bridge CFStringRef)number;
    CFStringRef phoneNumberLabel = (__bridge CFStringRef)@"home";

    ABMutableMultiValueRef phoneNumber = ABMultiValueCreateMutable(kABPersonPhoneProperty);

    ABMultiValueAddValueAndLabel(phoneNumber, phoneNumberValue, phoneNumberLabel, NULL);
    ABRecordSetValue(newPerson, kABPersonPhoneProperty, phoneNumber, NULL);

    NSAssert( !error, @"Something bad happened here." );

    // Create and set-up the new person view controller
    ABNewPersonViewController* newPersonViewController = [[ABNewPersonViewController alloc] initWithNibName:nil bundle:nil];
    [newPersonViewController setDisplayedPerson:newPerson];
    [newPersonViewController setNewPersonViewDelegate:self];

    [self.navigationController pushViewController:newPersonViewController animated:YES];
    [self.navigationController.navigationBar setHidden:NO];
}

- (void)newPersonViewController:(ABNewPersonViewController *)newPersonView didCompleteWithNewPerson:(ABRecordRef)person
{
    [self.navigationController popViewControllerAnimated:YES];
    [self.navigationController setNavigationBarHidden:YES animated:YES];
}