iPhone:无法识别的选择器在 Facebook 上发布流时发送到实例异常 [英] iPhone: Unrecognized selector sent to instance exception while publishing stream on Facebook

问题描述

我编写了以下代码来登录 Facebook 帐户，然后在用户的 Facebook 墙上发表评论.它工作正常并在 Facebook 墙上发布了下面提到的所有内容，但它异常抛出以下异常和终止应用程序.我挠了挠头，但找不到任何问题.谁能告诉我我的代码有什么问题?仅供参考，我已将 link1 和 link2谢谢！

I have wrote following code to logged into Facebook account followed by posting comment on user's facebook wall. It's working fine and posting everything mentioned below on Facebook wall but it throwing following exception and termination application abnormally. I scratched my head a lot but couldn't find anything wrong. Could anyone please tell me what's wrong in my code? FYI I have combined this code from link1 and link2Thanks!

异常:

-[NSConcreteMutableData objectForKey:]: unrecognized selector sent to instance 0x34a560
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteMutableData objectForKey:]: unrecognized selector sent to instance 0x34a560'

登录 Facebook 代码:

Login into Facebook code:

- (void)login {
    NSLog(@"Logging into Facebook...");
    UniversalAppAppDelegate *delegate = (UniversalAppAppDelegate *) [[UIApplication sharedApplication] delegate];
    NSArray* requiredPermissions =  [NSArray arrayWithObjects:@"read_stream", @"publish_stream", @"offline_access",nil];

    if (![[delegate facebook] isSessionValid]) {
        [delegate facebook].sessionDelegate = self;
        [[delegate facebook] authorize:requiredPermissions];
    }
}    

在墙上张贴:

- (void)postCommentToFacebookWall:(NSString*)comment
{
    UniversalAppAppDelegate *delegate = (UniversalAppAppDelegate *) [[UIApplication sharedApplication] delegate]; 

    NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               kAppId, @"api_key",
                               @"This is test message from my iPhone App",@"message",
                               nil];

    [[delegate facebook]  requestWithMethodName:@"stream.publish"
                                  andParams:params
                              andHttpMethod:@"POST"
                                andDelegate:self];
}

推荐答案

我没有发现这段代码有任何问题.但看起来一些 NSMutableData 对象试图代替 NSDictionary 使用.即 NSData 没有objectForKey:"方法.这可能发生在另一个应用程序的地方.

I've not found any problems with this code. But looks like some NSMutableData object tries to be used instead NSDictionary. i.e. NSData has no "objectForKey:" method. May be this occurs in another place of application.

您是否实现了回调方法?您在requestWithMethodName:"中将自己设置为委托.

Did you implement callbacks methods? You set yourself as delegate in "requestWithMethodName:".

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