objective-c - 使用 Storyboard segue 显示 ABPeoplePickerNavigationController

Question

我有一个新项目，我想在触摸按钮时显示人员选择器。

所以我有一个 UIButton，它转至具有标识符 showContacts 的通用 UIViewController。我将此 ViewController 的类设置为 ABPeoplePickerNavigationController。

现在在我的根 ViewController 中，我有这段代码来初始化我的选择器:

#pragma mark - Segues

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{

    if([segue.identifier isEqualToString:@"showContacts"]){
        ABPeoplePickerNavigationController *ppnc = segue.destinationViewController;
        ppnc.peoplePickerDelegate = self;
        ppnc.addressBook = ABAddressBookCreate(); 
        ppnc.displayedProperties = [NSArray arrayWithObject:[NSNumber numberWithInt:kABPersonPhoneProperty]];
    }
}

尽管我已将测试联系人添加到我的模拟器地址簿中，但结果如下所示:

no picker http://i.minus.com/jbwUQyLr36ChHo.png

使用下面的代码，这与我在 prepareForSegue: 方法中所做的非常相似，我设法通过 IBAction 显示一个选择器:

- (IBAction)showPicker:(id)sender {

    ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init];
    picker.peoplePickerDelegate = self;
    NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], 
                               [NSNumber numberWithInt:kABPersonEmailProperty],
                               [NSNumber numberWithInt:kABPersonBirthdayProperty], nil];
    picker.displayedProperties = displayedItems;
    // Show the picker 
    [self presentModalViewController:picker animated:YES];
}

结果:

picker http://i.minus.com/jeEVeIBmfIYdR.png

我不清楚为什么人员选择器不显示。

Answer 1

Besi 的回答很棒。但是只使用旧方法而不是使用 Storyboard的代码更少:

- (void)showPeoplePicker:(id)sender
{
    ABPeoplePickerNavigationController* picker = [[ABPeoplePickerNavigationController alloc] init];
    picker.peoplePickerDelegate = self;
    picker.modalPresentationStyle = UIModalPresentationFullScreen;
    picker.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
    [self presentViewController:picker
                       animated:YES                     
                     completion:^{
                     // animation to show view controller has completed.
                     }];
}