ios - Facebook SDK 原生登录报错

Question

注意:我遵循来自 Native Facebook Login stopped working after SDK update to 3.14 的 native 登录建议.

错误如下:

2014-10-13 20:03:27.378 Registration[1916:407643] Error Domain=com.facebook.sdk Code=9 "Access has not been granted to the Facebook account. Verify device settings." UserInfo=0x1753c630 {NSLocalizedDescription=Access has not been granted to the Facebook account. Verify device settings., NSLocalizedFailureReason=Access has not been granted to the Facebook account. Verify device settings.}

这是下面的代码:

//RegistrationManager.m

- (void)setupFacebook
{
    FBSessionStateHandler completionHandler = ^(FBSession *session, FBSessionState status, NSError *error) {
        [self sessionStateChanged:session state:status error:error];
    };

    if ([FBSession activeSession].state == FBSessionStateCreatedTokenLoaded)
    {
        // we have a cached token, so open the session
        [[FBSession activeSession] openWithBehavior:FBSessionLoginBehaviorUseSystemAccountIfPresent
                                  completionHandler:completionHandler];
    }
    else
    {
        [self clearAllUserInformation];

        // create a new facebook session
        FBSession *fbSession = [[FBSession alloc] initWithPermissions:@[@"public_profile"]];
        [FBSession setActiveSession:fbSession];
        [fbSession openWithBehavior:FBSessionLoginBehaviorUseSystemAccountIfPresent completionHandler:completionHandler];
    }
}

- (void)clearAllUserInformation
{
    [FBSession.activeSession closeAndClearTokenInformation];
    [FBSession renewSystemCredentials:^(ACAccountCredentialRenewResult result, NSError *error) {
        NSLog(@"%@", error);
    }];
    [FBSession setActiveSession:nil];
}

//RegistrationViewController.m

- (IBAction)loginButtonPressed:(id)sender
{
    // If the session state is any of the two "open" states when the button is clicked
    if (FBSession.activeSession.state == FBSessionStateOpen
        || FBSession.activeSession.state == FBSessionStateOpenTokenExtended)
    {
        // Close the session and remove the access token from the cache
        // The session state handler (in the app delegate) will be called automatically
        [FBSession.activeSession closeAndClearTokenInformation];

        // If the session state is not any of the two "open" states when the button is clicked
    } else
    {
        FBSessionStateHandler completionHandler = ^(FBSession *session, FBSessionState status, NSError *error) {
            [registrationManager sessionStateChanged:session state:status error:error];
        };

        // create a new facebook session
        FBSession *fbSession = [[FBSession alloc] initWithPermissions:@[@"public_profile"]];
        [FBSession setActiveSession:fbSession];
        [fbSession openWithBehavior:FBSessionLoginBehaviorUseSystemAccountIfPresent completionHandler:completionHandler];
    }
}

当我点击按钮时，它只是说

2014-10-13 20:03:29.560 Registration[1916:407643] Session closed 2014-10-13 20:03:29.561 Registration[1916:407643] User logs out. 2014-10-13 20:03:29.573 Registration[1916:407643] User logs out.

Answer 1

这意味着用户曾经在请求权限的弹出窗口中选择了“不允许”。如果他在“设置”中链接了他的 Facebook 帐户，从现在开始，每次他尝试登录时都会显示此错误。它不会回退到 Safari 或任何东西，只是显示这个错误。用户需要进入“设置”->“Facebook”并将您应用的 slider 设置为“打开”。