ios - 当我尝试登录 iOS sdk 时无法通过 FBSDKLoginKit 获取访问 token

Question

我正在使用 facebook sdk 在 facebook 上共享文本，但在尝试登录时无法获取访问 token 。登录成功，但没有获得任何访问 token 。 因此，如果没有访问 token ，我将无法在 Facebook 上共享文本。 我的代码如下

FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login logInWithReadPermissions:@[@"public_profile"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {


if ([result.token hasGranted:@"publish_actions"]) {
    [[[FBSDKGraphRequest alloc]
      initWithGraphPath:@"me/feed"
      parameters: @{ @"message" : @"hello world"}
      HTTPMethod:@"POST"]
     startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
         if (!error) {
             NSLog(@"Post id:%@", result[@"id"]);
         }
     }];
}

if (error) {
    // Process error
} else if (result.isCancelled) {

    // Handle cancellations
} else {
    // If you ask for multiple permissions at once, you
    // should check if specific permissions missing
    if ([result.grantedPermissions containsObject:@"email"]) {
        // Do work
    }
}

}];

我在 FBSDKLoginManager 对象的处理程序 block 中得到了没有错误的结果，但它不包含 token 或其他数据

输出如下

请告诉我如何解决这个问题 谢谢

Answer 1

试试这段代码。基于 Facebook SDK 4.0 版

AppDalegate.m

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

ViewController.m

- (IBAction)btnFacebookPressed:(id)sender {
    FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
    [login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
     {
         if (error)
         {
             // Process error
         }
         else if (result.isCancelled)
         {
             // Handle cancellations
         }
         else
         {
             if ([result.grantedPermissions containsObject:@"email"])
             {
                 NSLog(@"result is:%@",result);
                 [self fetchUserInfo];
                 [login logOut];
             }
         }
     }];
}

-(void)fetchUserInfo
{
    if ([FBSDKAccessToken currentAccessToken])
    {
        NSLog(@"Token is available : %@",[[FBSDKAccessToken currentAccessToken]tokenString]);

        [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, link, first_name, last_name, picture.type(large), email, birthday, bio ,location ,friends ,hometown , friendlists"}]
         startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error)
             {
                 NSLog(@"resultis:%@",result);
             }
             else
             {
                 NSLog(@"Error %@",error);
             }
         }];

    }

}