ios - Facebook iOS 选择 friend 表空白

Question

我正在尝试将“选择 friend ”添加到我的 iOS 应用程序。我设置了登录 View 。登录后，我打开好友选择器，但它是空白的。我看到带有完成和取消按钮的表格，但表格中没有加载 friend 。

- (IBAction)selectFriendsButtonAction:(id)sender {
    if (self.friendPickerController == nil) {
        // Create friend picker, and get data loaded into it.
        self.friendPickerController = [[FBFriendPickerViewController alloc] init];
        self.friendPickerController.title = @"Select Friends";
        self.friendPickerController.delegate = self;
    }
    [self.friendPickerController loadData];
    [self.friendPickerController clearSelection];
    [self presentViewController:self.friendPickerController animated:YES completion:nil];

}

Answer 1

在打开好友选择器 Controller 之前，通过调用以下命令确保您的 Facebook session 处于事件状态:

if (!FBSession.activeSession.isOpen) {
    // if the session is closed, then we open it here, and establish a handler for state changes
    [FBSession.activeSession openWithCompletionHandler:^(FBSession *session,
                                                         FBSessionState state,
                                                         NSError *error) {
        // Handle error
    }];
}