Objective c ios facebook sdk撤销访问预授权

我有一个安静的iOS

如何在FacebookGraphAPI中撤销访问权限以允许用户重新登录

这是我的密码

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSString *string = [NSString stringWithFormat:@"https://graph.facebook.com/ID?access_token=%@",[defaults objectForKey:@"FBAccessTokenKey"]];
NSLog(@"string = %@",string);

ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:string]];
[request setRequestMethod:@"DELETE"];
[request startSynchronous];

[facebook logout];

也许我做错了什么

当我尝试发布新的facebook消息时，我仍然有一个已经自动调整的屏幕

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谢谢

有了最新的Facebook SDK，这非常简单：

FBRequest *request = [FBRequest requestForDeleteObject:@"me/permissions"];
[request startWithCompletionHandler: ^(FBRequestConnection *connection, NSDictionary* result, NSError *error) {}