ios - FBFriendPickerViewController 在 iOS 上显示和空表。 Place Picker 运行良好

Question

我有这段代码，是从 FB 样本复制而来的(它运行良好)，但在我的应用程序中只显示了一个用于好友选择器的空白表格。 Place Picker 运行良好，显示了一张完整的表格。

Friend Picker 有什么问题？

在 AppDelegate 中:

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    [FBFriendPickerViewController class];
    [FBPlacePickerViewController class];

    return YES;
}

- (BOOL)application:(UIApplication *)application
        openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
    return [FBAppCall handleOpenURL:url sourceApplication:sourceApplication];
}

在 View Controller 中:

- (IBAction)pickFriendsButtonClick:(id)sender {
// FBSample logic
// if the session is open, then load the data for our view controller
if (!FBSession.activeSession.isOpen) {
    // if the session is closed, then we open it here, and establish a handler for state changes
    [FBSession openActiveSessionWithReadPermissions:@[@"public_profile", @"user_friends"]
                                       allowLoginUI:YES
                                  completionHandler:^(FBSession *session,
                                                      FBSessionState state,
                                                      NSError *error) {
                                      if (error) {
                                          UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                                                              message:error.localizedDescription
                                                                                             delegate:nil
                                                                                    cancelButtonTitle:@"OK"
                                                                                    otherButtonTitles:nil];
                                          [alertView show];
                                      } else if (session.isOpen) {
                                          [self pickFriendsButtonClick:sender];
                                      }
                                  }];
    return;
}
// Create friend picker, and get data loaded into it.
FBFriendPickerViewController *friendPickerController = [[FBFriendPickerViewController alloc] init];
friendPickerController.title = @"Pick Friends";
friendPickerController.delegate = self;

[friendPickerController loadData];

[friendPickerController presentModallyFromViewController:self animated:YES handler:nil];
}
- (IBAction)pickPlacesButtonClick:(id)sender{
    // FBSample logic
    // if the session is open, then load the data for our view controller
    if (!FBSession.activeSession.isOpen) {
        // if the session is closed, then we open it here, and establish a handler for state changes
        [FBSession openActiveSessionWithReadPermissions:@[@"public_profile", @"user_friends"]
                                           allowLoginUI:YES
                                      completionHandler:^(FBSession *session,
                                                          FBSessionState state,
                                                          NSError *error) {
                                          if (error) {
                                              UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                                                                  message:error.localizedDescription
                                                                                                 delegate:nil
                                                                                        cancelButtonTitle:@"OK"
                                                                                        otherButtonTitles:nil];
                                              [alertView show];
                                          } else if (session.isOpen) {
                                              [self pickPlacesButtonClick:sender];
                                          }
                                      }];
        return;
    }
    // Initialize the place picker
    FBPlacePickerViewController *placePickerController = [[FBPlacePickerViewController alloc] init];
    // Set the place picker title
    placePickerController.title = @"Pick Place";
    // Hard code current location to Menlo Park, CA
    placePickerController.locationCoordinate = CLLocationCoordinate2DMake(37.453827, -122.182187);
    // Configure the additional search parameters
    placePickerController.radiusInMeters = 1000;
    placePickerController.resultsLimit = 50;
    placePickerController.searchText = @"restaurant";
    placePickerController.delegate = self;

    // Load the place data
    [placePickerController loadData];
    // Show the place picker modally
    [placePickerController presentModallyFromViewController:self animated:YES handler:nil];
}

- (void)facebookViewControllerDoneWasPressed:(id)sender {
    NSLog(@"Done pressed");
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)facebookViewControllerCancelWasPressed:(id)sender {
    NSLog(@"Cancel pressed");
    [self dismissViewControllerAnimated:YES completion:NULL];
}

项目:

1. 制作了一个只有单一 View 的全新项目。
2. 添加了 2 个按钮并将它们与操作相关联。
3. 复制/粘贴示例中的代码。
4. 添加 Facebook 框架。
5. 编辑 plist 文件以添加 Facebook 申请编号。

我的餐 table (Place Picker) 满了餐厅。我的表( friend 选择器)仍然是空的。我做错了什么？

Answer 1

第 1 步:如果不存在则打开 Facebook session

if ( !FBSession.activeSession.isOpen ) {
[FBSession openActiveSessionWithPermissions:@[@"public_profile", @"email", @"user_friends" ]
                                       allowLoginUI:YES
                                  completionHandler:^(FBSession *session, FBSessionState state, NSError *error) {
                                      [self sessionStateChanged:session state:state error:error];
                                  }];
}

第 2 步:请求获取好友列表(包括必填字段)

FBRequest* friendsRequest = [FBRequest requestWithGraphPath:@"me/friends?fields=picture,name,username,location,first_name,last_name" parameters:nil HTTPMethod:@"GET"];
         [friendsRequest startWithCompletionHandler: ^(FBRequestConnection *connection, NSDictionary* result, NSError *error) {
         //store result into facebookFriendsArray 
         self.facebookFriendsArray = [result objectForKey:@"data"];
         }];

第 3 步:从 facebookFriendsArray 重新加载数据到 tableView