Facebook iOS SDK登录本机和UIWebView登录 [英] Facebook iOS SDK login native and UIWebView login

问题描述

对于我正在开发的应用程序，我需要用户能够使用本机SDK登录Facebook，但是在webview中使用FB评论小部件的应用程序中还有一个单独的部分。问题是在用户使用本机SDK登录后，他们未在webview评论小部件中登录。有没有办法让用户使用本机iOS SDK登录，然后在UIWebView中将它们登录到Facebook。我尝试在用户登录后在FBSession类中使用openAccessTokenFromData：completionHandler：但无法使其工作，如下所示

For an app I'm working on I need the users to be able to login to Facebook using the native SDK, but there is also a separate part of the app using an FB comments widget in a webview. The problem is after the user logs in using native SDK they are not logged in within the webview comments widget. Is there a way to have the user login using the native iOS SDK and then also log them into Facebook in a UIWebView. I tried using openAccessTokenFromData:completionHandler: in the FBSession class after the user signed in but couldn't get that to work, like below

- (void)didLogin
{
    FBAccessTokenData *data = [FBAccessTokenData createTokenFromString:[FBSession activeSession].accessTokenData.accessToken
                                                       permissions:[FBSession activeSession].accessTokenData.permissions
                                                    expirationDate:[FBSession activeSession].accessTokenData.expirationDate
                                                         loginType:FBSessionLoginTypeWebView
                                                       refreshDate:nil];

    [[FBSession activeSession] closeAndClearTokenInformation];

    FBSession *session = [[FBSession alloc] init];

    [session openFromAccessTokenData:data
               completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {
               }];
}    

推荐答案

我用以下代码打开Facebook iOs SDK在我的原生应用程序中登录Webview，它的工作正常。

I used following code to open Facebook iOs SDK login in Webview in my native app and its works fine for me.

-(void)openFacebookAuthentication
{
    NSArray *permission = [NSArray arrayWithObjects:kFBEmailPermission,kFBUserPhotosPermission, nil];

    FBSession *session = [[FBSession alloc] initWithPermissions:permission];

    [FBSession setActiveSession: [[FBSession alloc] initWithPermissions:permission] ];

    [[FBSession activeSession] openWithBehavior:FBSessionLoginBehaviorForcingWebView completionHandler:^(FBSession *session, FBSessionState status, NSError *error) {

        switch (status) {
            case FBSessionStateOpen:
                [self getMyData];
                break;
            case FBSessionStateClosedLoginFailed: {
                // prefer to keep decls near to their use
                // unpack the error code and reason in order to compute cancel bool
                NSString *errorCode = [[error userInfo] objectForKey:FBErrorLoginFailedOriginalErrorCode];
                NSString *errorReason = [[error userInfo] objectForKey:FBErrorLoginFailedReason];
                BOOL userDidCancel = !errorCode && (!errorReason || [errorReason isEqualToString:FBErrorLoginFailedReasonInlineCancelledValue]);


                if(error.code == 2 && ![errorReason isEqualToString:@"com.facebook.sdk:UserLoginCancelled"]) {
                    UIAlertView *errorMessage = [[UIAlertView alloc] initWithTitle:kFBAlertTitle
                                                                           message:kFBAuthenticationErrorMessage
                                                                           delegate:nil
                                                                           cancelButtonTitle:kOk
                                                                           otherButtonTitles:nil];
                    [errorMessage performSelectorOnMainThread:@selector(show) withObject:nil waitUntilDone:YES];
                    errorMessage = nil;
                    }
                }
                break;
                // presently extension, log-out and invalidation are being implemented in the Facebook class
            default:
                break; // so we do nothing in response to those state transitions
        }
    }];
    permission = nil;
}

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