ios - 发布到朋友墙并取消授权错误

Question

我正在尝试发布到朋友墙，但它不起作用。我可以张贴到我的墙上。

     - (void)publishStory
{
    NSString *graph=@"me/feed";
    if([self.friendId length]!=0){
        graph=[NSString stringWithFormat:@"%@/feed", self.friendId];
    }
    self.postParams = [@{
                       @"link" : self.link,
                       @"picture" : self.imageUrl,
                       @"name" :self.name,
                       @"caption" :self.caption,
                       @"description" : self.postMessageTextView.text
                       } mutableCopy];


    [FBRequestConnection
     startWithGraphPath:graph
     parameters:self.postParams
     HTTPMethod:@"POST"
     completionHandler:^(FBRequestConnection *connection,
                         id result,
                         NSError *error) {
         NSString *alertText;
         if (error) {
             NSLog(@"Error publish %@", error.localizedDescription);
             alertText = [NSString stringWithFormat:
                          @"error: domain = %@, code = %d",
                          error.domain, error.code];
         } else {
             alertText = @"Posted to Facebook. Thank you";
         }
         // Show the result in an alert
         [[[UIAlertView alloc] initWithTitle:@"Result"
                                     message:alertText
                                    delegate:self
                           cancelButtonTitle:@"OK!"
                           otherButtonTitles:nil]
          show];
     }];


}

这是错误。

body =         {
        error =             {
            code = 200;
            message = "(#200) The user hasn't authorized the application to perform this action";
            type = OAuthException;
        };
    };
    code = 403;