FHSTwitterEngine-'NSInvalidArgumentException'，'数据参数为nil' [英] FHSTwitterEngine - 'NSInvalidArgumentException','data parameter is nil'

问题描述

我正在使用FHSTwitterEngine将gif发布到twitpic.当我在iPhone上具有wifi或3G连接时，一切正常.但是我也想在没有连接或上传失败时实现一些错误处理.因此，为了进行测试，我将iPhone置于飞行模式，并尝试使用以下方法上传到twitpic:

I'm using FHSTwitterEngine to post a gif to twitpic. When I have a wifi or 3G connection on the iphone everything works fine. But I also want to implement some error handling for when there is no connection or when the upload failed. So for testing I put the iphone in airplane mode and try to upload to twitpic using the following method:

id returned = [[FHSTwitterEngine sharedEngine] uploadImageToTwitPic:gif 
withMessage:@"message" twitPicAPIKey:@"key"];

但是当我这样做时，我立即收到以下错误:

but when I do that I immediately get the following error:

Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: 'data parameter is nil'

然后xcode指向FHSTwitterEngine框架中的这一行代码:

then xcode points to this line of code in the FHSTwitterEngine framework:

 id parsedJSONResponse = removeNull([NSJSONSerialization JSONObjectWithData:responseData 
options:NSJSONReadingMutableContainers error:nil]);

有关如何解决此问题的任何想法?

any ideas on how to solve this?

推荐答案

您可以先检查Internet连接.

You could check for internet connectivity first.

Reachability *networkReachability = [Reachability reachabilityForInternetConnection];   
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];    
if (networkStatus == NotReachable) {        
    NSLog(@"There IS NO internet connection");        
} else {        

     NSLog(@"There IS internet connection");        

    }        
}

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