我是第一次使用 Facebook SDK。我正在使用 Xcode 5.1 和 iOS 7。

我以编程方式显示 FBLoginView:

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"viewDidLoad");

    // Do any additional setup after loading the view.

    if ( !loginView ) {
       // loginView =[[FBLoginView alloc] initWithReadPermissions:@[@"basic_info"]];
        loginView =[[FBLoginView alloc] initWithReadPermissions:[NSArray arrayWithObjects:@"basic_info", @"user_location", nil]];
    }
    loginView.delegate = self;

    loginView.frame = CGRectOffset(loginView.frame,
                    (self.view.center.x -(loginView.frame.size.width /2)), 5);
    CGPoint vCenter   = CGPointMake( CGRectGetMidX(self.view.frame),
                                   CGRectGetMidY(self.view.frame) );
    CGPoint lvCenter  = CGPointMake( vCenter.x, vCenter.y+100.0 );
    loginView.center = lvCenter;
    [self.view addSubview:loginView];

    [self updateView];
}

我已经实现了所需的覆盖功能:

#pragma mark - FBLoginViewDelegate

- (void) loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user {
    NSLog(@"loginViewFetchedUserInfo");

     [self updateView];

}
- (void) loginViewShowingLoggedInUser:(FBLoginView *)loginView {
    NSLog(@"loginViewShowingLoggedInUser");

    [self updateView];

}
- (void) loginViewShowingLoggedOutUser:(FBLoginView *)loginView {
    NSLog(@"loginViewShowingLoggedOutUser");

     [self updateView];
}

- (void)updateView {
    NSLog(@"FB updateView");
    [[FBRequest requestForMe] startWithCompletionHandler:
     ^(FBRequestConnection *connection, NSDictionary<FBGraphUser>*FBUser, NSError *error) {
         if (error) {
             NSLog(@"updateView - error");
         } else {
             NSLog(@"updateView - good");
             NSNumber    *owner_id  = [NSNumber numberWithLong:[[FBUser id] longLongValue]];
             if ( FB_user_id == nil ) {
                 FB_user_id = owner_id;
                 NSLog(@"FBUser ID  = %@", FB_user_id);

                 loggedInSession = [FBSession activeSession];
                 [[NSUserDefaults standardUserDefaults] setObject:[FBUser id] forKey:@"eventOwnerID"];
                 [self performSegueWithIdentifier:@"continue_to_app" sender:self];
             }
         }
     }];
    if ([self checkFacebookSession]) {
    }
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.view setNeedsDisplay];
    });
}

FBLoginView 按钮显示“使用 Facebook 登录”。我可以登录并接受权限，但永远不会调用 loginViewShowingLoggedInUser 覆盖函数。

有人建议添加以下内容:

- (BOOL) application:(UIApplication *) application 
                openURL:(NSURL *)url 
                sourceApplication:(NSString *)sourceApplication 
                annotation:(id)annotation 
{
    NSLog ( @"application openURL");
    NSLog ( @"URL = %@", url);
    NSLog ( @"Application = %@", sourceApplication);
    // Call FBAppCall's ha
    BOOL wasHandled = [FBAppCall handleOpenURL:url sourceApplication:sourceApplication];
    //[LoginUIViewController updateView];

    return wasHandled;
}

此代码没有任何效果，也从未执行过。

我做错了什么？

最佳答案

1. 您正在使用@"basic_info"，因为当我尝试测试您的代码时，Facebook 显示以下错误!

   Invalid Scope: basic_info. Use public_profile, user_friends instead
   

2. 我很想知道您在哪里添加了方法:

   - (BOOL) application:(UIApplication *) application 
                openURL:(NSURL *)url 
      sourceApplication:(NSString *)sourceApplication 
             annotation:(id)annotation 
   {
       NSLog ( @"application openURL");
       NSLog ( @"URL = %@", url);
       NSLog ( @"Application = %@", sourceApplication);
       // Call FBAppCall's ha
       BOOL wasHandled = [FBAppCall handleOpenURL:url sourceApplication:sourceApplication];
       //[LoginUIViewController updateView];
   
       return wasHandled;
   }
   

它应该在您的 AppDelegate 中，这对我有用。

关于ios - 没有从 FBLoginView 调用 loginViewShowingLoggedInUser，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23501999/