如何在iOS中从Facebook检索相册

Question

我想从我的Facebook帐户中检索所有相册。我也遵循Graph API并使用最新的Facebook API。

我的代码是这样的：

 -(IBAction)getgallery:(id)sender
 {
   FBRequest *request = [FBRequest requestForGraphPath:@"me/albums"];
   [request startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary <FBGraphUser> *my, NSError *error) {
    if ([my[@"data"]count]) {
        for (FBGraphObject *obj in my[@"data"]) {
            FBRequest *r = [FBRequest requestForGraphPath:[NSString stringWithFormat:@"/%@/photos", obj[@"id"]]];
            [r startWithCompletionHandler:^(FBRequestConnection *c, NSDictionary <FBGraphUser> *m, NSError *err) {
                //here you will get pictures for each album
            }];
          }
        }
    }];
 }

我关注this链接。但无法正确理解。请有人帮我吗？

按 getgallery 按钮时，没有任何事情发生。