CNUI错误选择谓词已设置，但委托未实现contactPicker:didSelectContact: [英] CNUI ERROR Selection predicates are set but the delegate does not implement contactPicker:didSelectContact:

问题描述

我尝试使用新的iOS 9.0 CNContactPickerViewController 在Objective-C中选择一个联系人.我设置了委托并实现了 CNContactPickerDelegate 方法.

I try to use the new iOS 9.0 CNContactPickerViewController to select a contact in objective-C. I set the delegate and implement the CNContactPickerDelegate methods.

@import ContactsUI;
@import Contacts;
//-----------------------------------------------------------------------
- (void) presentContacts
{
    CNContactPickerViewController *contactPicker = [[CNContactPickerViewController alloc] init];
    contactPicker.delegate = self;
    contactPicker.predicateForEnablingContact = [NSPredicate predicateWithFormat:@"familyName LIKE[cd] 'smith'"];
    contactPicker.predicateForSelectionOfContact = [NSPredicate predicateWithFormat:@"TRUEPREDICATE"];
    [_myViewController presentViewController:contactPicker animated:YES completion:nil];
}
//-----------------------------------------------------------------------
- (void) contactPickerDidCancel: (CNContactPickerViewController *) picker
{
    NSLog(@"didCancel");
}
//-----------------------------------------------------------------------
- (void) contactPicker: (CNContactPickerViewController *) picker
      didSelectContact: (CNContact *)                     contact
{
    NSLog(@"didSelectContact"):
}
//-----------------------------------------------------------------------
- (void)      contactPicker: (CNContactPickerViewController *) picker
   didSelectContactProperty: (CNContactProperty *)             contactProperty
{
    NSLog(@"didSelectProperty");
}
//-----------------------------------------------------------------------

联系人选择器显示为史密斯"可选，但我收到以下消息:

The contacts picker is presented with 'smith' selectable but I get the following message:

[CNUI错误]已设置选择谓词，但委托未实现contactPicker:didSelectContact:和contactPicker:didSelectContactProperty:.这些谓词将被忽略.

而且我从来没有从委托方法中得到任何日志.它的行为与线条完全相同

And I never get any log from the delegate methods. It behaves exactly as the line

    contactPicker.delegate = self;

被忽略.即使我单击选择器中的取消"按钮，也没有收到"didCancel"消息，但又收到了另一条消息:

is ignored. Even I click on the "cancel" button in the picker, I don't get my "didCancel" message but I get another message:

插件com.apple.MobileAddressBook.ContactsViewService无效

我发现在 https://forums.developer.apple.com/thread/12275很快遇到类似问题的人，他解决了这个问题并告诉我们:因此，我发现我正在呼叫的ContactsPicker位于错误的模块中" ，但我不明白我们怎么能得到错误的信息模块以及如何调用正确的"模块.

I found in https://forums.developer.apple.com/thread/12275 somebody with the similar problem in swift and he solved it telling us: "So I found that the ContactsPicker I was calling was in the wrong module" but I do not understand how we can get the wrong module and how to call the "right" module.

在模拟器和真实设备(iPad)上，我也遇到相同的问题.

I have the same problem on the simulator and on a real device (iPad).

推荐答案

感谢乔尔在我的相关问题中

Thanks to Joel in my related question With CNContactPickerViewController in iOS 9.0, how to enable/disable single or multiple selection?, I found that I just forgot to store the CNContactPickerViewController in a property that exists the time the user make the selection.

所以我的代码变成:

- (void) presentContacts
{
    _contactPicker = [[CNContactPickerViewController alloc] init];
    contactPicker.delegate = self;
    ...
}

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