ios - ABPeoplePickerNavigationController shouldContinueAfterSelectingPerson 返回搜索结果

Question

- (BOOL)peoplePickerNavigationController:
(ABPeoplePickerNavigationController *)peoplePicker
      shouldContinueAfterSelectingPerson:(ABRecordRef)person {

        DefaultContactSelectViewController *view = [[self storyboard] instantiateViewControllerWithIdentifier:@"DefaultContactView"];
        view.recordID  = recordID;
        view.phones = phones;
        view.emails = emails;
        view.first_name = first_name;
        view.last_name = last_name;
        view.delegate = self;

        [peoplePicker pushViewController:view animated:YES];
    return NO;
}

在上面的代码示例中，我在选择联系人后推送自定义联系人 View Controller 。问题是如果联系人是从搜索结果中选择的，然后用户单击返回返回联系人选择器，搜索结果将被清除。

如果上面的代码返回 YES，这个问题就不会发生，但是它会推送默认的联系人 View ，这不是我想要的。

如果您知道如何解决此问题，请提前致谢。

Answer 1

您可能应该编写自定义的 PeoplePickerViewController，因为您永远无法充分控制 Apple 的默认 Controller 。

无论如何，对于您当前的问题，这是您需要做的:

声明三个新属性(根据您是否使用 ARC 使用适当的声明 - 我假设没有 ARC)

@property (nonatomic, assign) ABPeoplePickerNavigationController *peoplePicker;
@property (nonatomic, assign) UIViewController *peoplePickerRootViewController;
@property (nonatomic, copy) NSString *currentSearchString;

现在，当您显示人员选择器时，添加以下行:

// save people picker when displaying
self.peoplePicker = [[[ABPeoplePickerNavigationController alloc] init] autorelease];

// save it's top view controller
self.peoplePickerRootViewController = self.peoplePicker.topViewController;

// need to see when view controller is shown/hidden - viewWillAppear:/viewWillDisappear: won't work so don't bother with it.
self.peoplePicker.delegate = self;

现在，我们将在推送人员 View 之前保存搜索字符串:

- (BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person
{
    self.currentSearchString = nil;
    if ([self.peoplePickerRootViewController.searchDisplayController isActive])
    {
        self.currentSearchString = self.peoplePickerRootViewController.searchDisplayController.searchBar.text;
    }
    // other stuff... 

显然，在这个类中实现 UINavigationControllerDelegate。当 Root View 重新进入 View 时，我们将强制显示搜索结果 View 。这是 navigationController:willShowViewController:animated:

的实现

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (navigationController == self.peoplePicker)
    {
        if (viewController == self.peoplePickerRootViewController)
        {
            if (self.currentSearchString)
            {
                [self.peoplePickerRootViewController.searchDisplayController setActive: YES];
                self.peoplePickerRootViewController.searchDisplayController.searchBar.text = self.currentSearchString;
                [self.peoplePickerRootViewController.searchDisplayController.searchBar becomeFirstResponder];
            }
            self.currentSearchString = nil;
        }
    }
}

如果不使用 ARC，不要忘记在 dealloc 中释放 currentSearchString。

小警告:当 ABPeoplePickerNavigationController 试图隐藏搜索结果 View 时，当您选择一个人时会出现轻微的闪烁。