使用storyboard segue显示ABPeoplePickerNavigationController [英] Display ABPeoplePickerNavigationController using storyboard segue

问题描述

我有一个新的项目，我想显示一个人物选择器，因为我有一个 UIButton ，其转换为具有标识符 showContacts 的通用 UIViewController 。我设置这个ViewController的类为 ABPeoplePickerNavigationController 。

现在在我的根ViewController我有这个代码来初始化我的picker：

  #pragma mark  -  Segues 
 
  - （void）prepareForSegue：（UIStoryboardSegue *）segue发件人：（id）发件人{
 
 if（[segue.identifier isEqualToString：@showContacts]）{
 ABPeoplePickerNavigationController * ppnc = segue.destinationViewController; 
 ppnc.peoplePickerDelegate = self; 
 ppnc.addressBook = ABAddressBookCreate（）; 
 ppnc.displayedProperties = [NSArray arrayWithObject：[NSNumber numberWithInt：kABPersonPhoneProperty]]; 
} 
} 
  

虽然我已将测试联系人添加到我的模拟器地址簿结果如下所示：

使用以下代码，这与我在 prepareForSegue：方法中做的非常相似，我设法显示一个选择器通过 IBAction ：

   - （IBAction）showPicker： 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; 
 //显示选择器
 [self presentModalViewController：picker animated：YES]; 
} 
  

结果：

我不清楚为什么人们选择器不显示。

解决方案

奇怪的是我建议的我可以使用视图控制器的指定初始化器吗？修复了我的问题。所以为 ABPeoplePickerNavigationController 创建一个代理ViewController修复了这个问题，但是没有解释为什么内建的选择器不能在storyboard中使用：

这是我的包装类的代码：

  #importPeoplePickerViewControllerWrapper.h 
 
 @implementation PeoplePickerViewControllerWrapper 
 
 @synthesize ppvc = _ppvc; //这是我代理的对象（被代理人可以这么说）
 @synthesize delegate = _delegate; 
 
  - （void）awakeFromNib 
 {
 self.ppvc = [[ABPeoplePickerNavigationController alloc] init]; 
 self.ppvc.peoplePickerDelegate = self; 
 self.ppvc.addressBook = ABAddressBookCreate（）; 
 self.ppvc.displayedProperties = [NSArray arrayWithObject：[NSNumber numberWithInt：kABPersonPhoneProperty]]; 
} 
 
 #pragma mark  - 查看生命周期
 
  - （void）loadView 
 {
 [super loadView]; 
 [self.ppvc loadView]; 
} 
 
  - （void）viewDidLoad 
 {
 [super viewDidLoad]; 
 [self.ppvc viewDidLoad]; 
} 
 
  - （void）viewWillAppear：（BOOL）animated {
 [super viewWillAppear：animated]; 
 [self.ppvc viewWillAppear：animated]; 
} 
 
  - （void）viewDidDisappear：（BOOL）animated {
 [super viewDidDisappear：animated]; 
 [self.ppvc viewDidDisappear：animated]; 
} 
 
  - （UIView *）view {
 return self.ppvc.view; 
} 
 
  - （void）viewDidUnload 
 {
 [super viewDidUnload]; 
 [self.ppvc viewDidUnload]; 
} 
  

I have a new project where I want to display a People Picker, when a button is touched.

So I have a UIButton that segues to a generic UIViewController with the identifier showContacts. I set the class of this ViewController to ABPeoplePickerNavigationController.

Now in my root ViewController I have this code to initialize my picker:

#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]];
    }
}

Although I have added test contacts to my Simulator Address book the results looks like this:

With the following code, which is very similar to what I do in the prepareForSegue: method, I manage to show a picker via an IBAction:

- (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];
}

The result:

It is not clear to me why the People picker does not show.

解决方案

Curiously what I suggested on Can I use segues with designated initializers of view controllers? fixed the issue for me as well. So creating a proxy ViewController for the ABPeoplePickerNavigationController fixes the issue, but it does not explain, why the built-in pickers can't be used in storyboards:

This is the code for my wrapper class:

#import "PeoplePickerViewControllerWrapper.h"

@implementation PeoplePickerViewControllerWrapper

@synthesize ppvc = _ppvc;  // This is the object I'm proxying (The proxyee so to speak)
@synthesize delegate = _delegate;

- (void)awakeFromNib
{
        self.ppvc = [[ABPeoplePickerNavigationController alloc] init ];
        self.ppvc.peoplePickerDelegate = self;
        self.ppvc.addressBook = ABAddressBookCreate(); 
        self.ppvc.displayedProperties = [NSArray arrayWithObject:[NSNumber numberWithInt:kABPersonPhoneProperty]];
}

#pragma mark - View lifecycle

- (void)loadView
{
    [super loadView];
    [self.ppvc loadView];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.ppvc viewDidLoad];
}

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [self.ppvc viewWillAppear:animated];
}

-(void)viewDidDisappear:(BOOL)animated{
    [super viewDidDisappear:animated];
    [self.ppvc viewDidDisappear:animated];
}

-(UIView *)view{
    return self.ppvc.view;
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    [self.ppvc viewDidUnload];
}

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