Facebook Wall Post就在Facebook注册iOS- facebook SDK 3.2之后

Question

Facebook SDK 3.2

我需要在使用faceboook登录后在Facebook上发布一个墙贴.

这是我正在使用的代码:

在这里,我打开了Facebook会议:

- (IBAction)FBSignup:(id)sender {
    [[AppDelegate sharedObject] openSession:^(FBSession *session, FBSessionState state, NSError *error) {
        [self sessionStateChanged:session state:state error:error];
    }];
}

在状态变化,我用[self populateUserDetails]填充数据,然后尝试在Facebook墙上发布[self postOnFB],但Facebook墙上没有帖子.

- (void)sessionStateChanged:(FBSession *)session
                      state:(FBSessionState) state
                      error:(NSError *)error
{
    switch (state) {
        case FBSessionStateOpen:

            [self populateUserDetails];
            [self postOnFB];
            break;

        case FBSessionStateClosed:
        case FBSessionStateClosedLoginFailed:
            [FBSession.activeSession closeAndClearTokenInformation];
            break;
        default:
            break;
    }

    [[NSNotificationCenter defaultCenter]
     postNotificationName:SCSessionStateChangedNotification
     object:session];

    if (error) {
        UIAlertView *alertView = [[UIAlertView alloc]
                                  initWithTitle:@"Error"
                                  message:error.localizedDescription
                                  delegate:nil
                                  cancelButtonTitle:@"OK"
                                  otherButtonTitles:nil];
        [alertView show];
    }
}

在这里,我用我需要的facebook用户对象弹出数据.

- (void)populateUserDetails
{
    if (FBSession.activeSession.isOpen) {

        [[FBRequest requestForMe] startWithCompletionHandler:
         ^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {

             if (!error) {
               ///////////////////////////////  
               // Populating Data Where Needed
               ///////////////////////////////


              //   [self postOnFB];
             }
         }];
    }
}

在这里我尝试用[self postOnFB]发布墙贴,它给出了错误:

由于未捕获的异常'com.facebook.sdk:InvalidOperationException'终止应用程序,原因:'FBSession:在先前的重新授权调用尚未完成时重新授权无效.

我在这里贴墙.

- (void)postOnFB{

    // Ask for publish_actions permissions in context
    if ([FBSession.activeSession.permissions
         indexOfObject:@"publish_actions"] == NSNotFound) {
        // No permissions found in session, ask for it
        [FBSession.activeSession requestNewPublishPermissions:[NSArray arrayWithObject:@"publish_actions"]
                                              defaultAudience:FBSessionDefaultAudienceFriends
                                            completionHandler:^(FBSession *session, NSError *error) {
                                                if (!error) {
                                                    [self fbPostSettings];
                                                }
                                            }];
    } else {
        // If permissions present, publish the story
        [self fbPostSettings];
    }
}

为facebook wall post设置参数:

- (void)fbPostSettings{

NSDictionary * facebookParams = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
     kFacebookPostLink,                             @"link",
     kFacebookPostImage,                            @"picture",
     kFacebookPostName,                             @"name",
     kFacebookPostCaption,                          @"caption",
     kFacebookPostDescription,                      @"description",
     nil];

    [FBRequestConnection startWithGraphPath:@"me/feed"
                                 parameters:facebookParams
                                 HTTPMethod:@"POST"
                          completionHandler:^(FBRequestConnection *connection,
                                              id result,
                                              NSError *error) {
                              NSString *alertText;
                              if (error) {
                                  alertText = [NSString stringWithFormat:
                                               @"error: domain = %@, code = %d",
                                               error.domain, error.code];
                              } else {
                                  alertText = [NSString stringWithFormat:
                                               @"Posted action, id: %@",
                                               [result objectForKey:@"id"]];
                              }
                              NSLog(@"%@",alertText);
                          }];
}

- (void)sessionStateChanged:(NSNotification*)notification {
    [self populateUserDetails];
}

如果我在某个按钮操作选择器上调用postOnFB(在通过facebook用户对象完成数据填充之后),它会在墙上发布.但是我需要在startWithCompletionHandler中获取用户对象之后发布它:^(FBRequestConnection*connection,NSDictionary*user,NSError*error)方法.

请帮忙.谢谢大家 :)

Answer 1

而不是打开会话然后请求发布权限,直接请求发布权限以打开会话

[FBSession openActiveSessionWithPublishPermissions:[NSArray arrayWithObjects:@"publish_stream",
                                                    nil] defaultAudience:FBSessionDefaultAudienceEveryone allowLoginUI:YES completionHandler:^(FBSession *session, 
   FBSessionState state, NSError *error) {
if (FBSession.activeSession.isOpen && !error) {
     [self fbPostSettings]; 
}];