Facebook iOS 3.1 sdk登录发布权限回调 [英] Facebook iOS 3.1 sdk login with publish permission callbacks

问题描述

我的应用有一个分享视频的按钮，当用户点击我想添加基本的+发布权限。据了解，我必须打两个电话 -

1. openActiveSessionWithReadPermissions ，然后


2. reauthorizeWithPublishPermissions

我现在使用的代码：

  //打开Facebook会话，并可选择显示登录UX。 
  - （void）openSessionForReadPermissions 
 {
 [FBSession openActiveSessionWithReadPermissions：nil 
 allowLoginUI：YES 
 completionHandler：
 ^（FBSession * session，
 FBSessionState状态，NSError *错误）{
 
 //甚至从reauthorizeWithPublishPermissions调用
 if（state == FBSessionStateOpen&&！error）
 {
 [self openSessionForPublishPermissions]; 
} 
 else if（state == FBSessionStateClosedLoginFailed）
 {
 [FBSession.activeSession closeAndClearTokenInformation]; 
 
 [[NSNotificationCenter defaultCenter] postNotificationName：FBLoginErrorNotification对象：session]; 
} 
}]; 
} 
 
  - （void）openSessionForPublishPermissions 
 {
 NSArray * permissions = [NSArray arrayWithObject：@publish_stream]; 
 
 [[FBSession activeSession] reauthorizeWithPublishPermissions：permissions 
 defaultAudience：FBSessionDefaultAudienceFriends 
 completionHandler：
 ^（FBSession * session，NSError * error）
 {
 if（！error）
 {
 [[NSNotificationCenter defaultCenter] 
 postNotificationName：FBLoginSuccessNotification 
 object：session]; 
} 
 else 
 {
 [[NSNotificationCenter defaultCenter] 
 postNotificationName：FBLoginErrorNotification 
 object：session]; 
} 
}]; 
} 
  

我看到openSessionForReadPermissions中的块被调用两次（一次使用FBSessionStateOpen和一旦从OpenSessionForPublishPermissions调用的FBSessionStateOpenTokenExtended），并且当我第一次尝试登录到应用程序（如果O删除所有应用程序权限）时，我得到一个ErrorReauthorizeFailedReasonUserCancelled。

什么是正确的方式来实现这个登录？该应用程序不需要Facebook登录，除了此功能之外，所以登录过程应该在同一个按钮上。

谢谢！

解决方案

我遇到同样的问题。我找到的解决方案是在dispatch_async块中打包调用 [self openSessionForPublishPermissions]; 。

示例： / p>

  dispatch_async（dispatch_get_current_queue（），^ {
 [self openSessionForPublishPermissions]; 
}）; 
  

原因是重新授权的调用需要在其中openActiveSession的事件循环之后。被称为。

I'm having trouble logging in with publish permissions in the facebook 3.1 ios sdk.

My app has a button to share a video, and when the user clicks it I want to add the basic + publish permission. As I understand, i have to do two calls -

1. openActiveSessionWithReadPermissions, and then
2. reauthorizeWithPublishPermissions

Here's the code I'm using now:

//Opens a Facebook session and optionally shows the login UX.
- (void)openSessionForReadPermissions
{
    [FBSession openActiveSessionWithReadPermissions:nil
                                       allowLoginUI:YES
                                  completionHandler:
     ^(FBSession *session,
       FBSessionState state, NSError *error) {

         //this is called even from the reauthorizeWithPublishPermissions
         if (state == FBSessionStateOpen && !error)
         {
             [self openSessionForPublishPermissions];
         }
         else if (state == FBSessionStateClosedLoginFailed)
         {
             [FBSession.activeSession closeAndClearTokenInformation];

             [[NSNotificationCenter defaultCenter] postNotificationName:FBLoginErrorNotification object:session];
         }
     }];
}

-(void)openSessionForPublishPermissions
{    
    NSArray* permissions = [NSArray arrayWithObject:@"publish_stream"];

    [[FBSession activeSession] reauthorizeWithPublishPermissions:permissions
                                                 defaultAudience:FBSessionDefaultAudienceFriends
                                               completionHandler:
     ^(FBSession *session, NSError *error)
     {
         if (!error)
         {
             [[NSNotificationCenter defaultCenter]
              postNotificationName:FBLoginSuccessNotification
              object:session];
         }
         else
         {
             [[NSNotificationCenter defaultCenter]
              postNotificationName:FBLoginErrorNotification
              object:session];
         }
     }];
}

I see that the block in the openSessionForReadPermissions is called twice (once with FBSessionStateOpen and once with FBSessionStateOpenTokenExtended from the openSessionForPublishPermissions call), and I get a ErrorReauthorizeFailedReasonUserCancelled when first trying to login to the app (if O deleted all app permissions before).

What is the proper way to implement this login? The app does not require Facebook log-in, except for this one feature, so the login process should be on the same button push.

Thanks!

解决方案

I ran across this same issue. The solution I found was wrapping the call to [self openSessionForPublishPermissions]; in a dispatch_async block.

Example:

dispatch_async(dispatch_get_current_queue(), ^{
    [self openSessionForPublishPermissions];
});

The reason is that the call to reauthorize.. needs to be after the event loop of which openActiveSession.. is called.

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