iphone - xcode 计算 JSON 项目

Question

我需要计算此 JSON 响应中的项目(帖子)数量，

2012-06-04 14:09:57.872 horitable[72261:11903] JSON : {
posts =     (
            {
        post =             {
            eventdate = "2012-03-31";
            eventid = 2;
            eventimage = "http://hernandoz.local/~hernandoz/kopict/02_31march2012.jpg";
            eventinfo = "02 event";
            eventname = "xplosion 02";
        };
    },
            {
        post =             {
            eventdate = "2012-07-07";
            eventid = 3;
            eventimage = "http://hernandoz.local/~hernandoz/kopict/greg_vs_turner.jpg";
            eventinfo = "02 event";
            eventname = "Xplosion 02";
        };
    },
            {
        post =             {
            eventdate = "2012-04-29";
            eventid = 4;
            eventimage = "http://hernandoz.local/~hernandoz/kopict/ko_itclub_apr_2012.jpg";
            eventinfo = "KO East London Interclub";
            eventname = "KO Interclub";
        };
    }
);

}

我知道只有 3 个事件(发布)，这是我正在使用的代码

 [[AFNetworkActivityIndicatorManager sharedManager] decrementActivityCount];
    NSLog(@"JSON : %@", JSON); //get the JSON response

    // 6.1 - Load JSON into internal variable
    jsonResponse = JSON;
    // 6.2 - Get the number of shows (post)
    int shows = 0;
    for (NSDictionary* day in jsonResponse) {
        shows += [[day objectForKey:@"posts"] count];

        NSLog(@"count : %d",shows);
    }

我收到错误，但我不明白为什么。

-[__NSCFString objectForKey:]: unrecognized selector sent to instance 0x76986f0

有人可以帮我吗？谢谢

Answer 1

试试这个

NSLog(@"Response members= %@",responseString);
NSArray *array = [(NSDictionary*)[responseString JSONValue] objectForKey:@"posts"];
NSLog(@"Count value= %d",[array count]);