facebook - iOS Facebook SDK 3.2 通过图路径请求检查权限

Question

我正在尝试检查用户是否已授予发布权限。如果他之前没有授予权限，那么我通过以下方式将他导航到权限屏幕:requestNewPublishPermissions

  -(void)checkPermissions
    {
        // Get the most recent status
        [FBRequestConnection
         startWithGraphPath:@"me/permissions"
         completionHandler:^(FBRequestConnection *connection,
                             id result,
                             NSError *error) {
             if (!error) { 
                    //This Condition Never Executed

                 if([[result objectForKey:@"data"] objectForKey:@"publish_actions"])
                 {
                     //permissions exist
                 }
                 else
                 {
                     [self openSessionForPublishPermissions];
                 }
                 NSString *permission = [[result objectForKey:@"data"] objectForKey:@"publish_actions"];

                 NSLog(@"permissions data = %@",data);
             }
             else
             {
                 NSLog(@"error"); //Control goes to this block
             }
         }];

    }

在上面的代码中，if(!error) block 永远不会执行，并且总是返回 Error

我哪里错了？我错过了什么吗？

Answer 1

您可以查看事件 session 中的权限。以下是 HelloFacebookSample 中的实现方式:

if ([FBSession.activeSession.permissions indexOfObject:@"publish_actions"] == NSNotFound) {
    // permission does not exist
} else {
    // permission exists
}