iOS JSON NSString Convert to NSDictionary

    NSString *str = @"{"info":{"body":"这个里面是是测试代码,里面有二个图片<!--img#0--><br/><!--img#1-->","img":[{"ref":"<!--img#0-->","src":"http://img.baidu.com/img/iknow/wenku/huazhang315x150.jpg"},{"ref":"<!--img#1-->","src":"http://img.baidu.com/img/iknow/wenku/lxg315X150-lxg.jpg"}]}}";
    
    NSError *error = nil;
    NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&error];

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