ios - 如何在目标c中访问值json对象

Question

我有一个 json 文件，代码如下：

{"fileContent":[{"name":"directorffdsgfg","type":"file","ext":"sql","modified":"2013\/04\/11 - 10:00","created":"2013\/04\/11 - 10:00","size":"1577"},{"name":"directory02","type":"file","ext":"sql","modified":"2013\/04\/11 - 12:10","created":"2013\/04\/11 - 12:10","size":"1577"},{"name":"jquery-mousewheel-master","type":"file","ext":"zip","modified":"2013\/04\/11 - 12:10","created":"2013\/04\/11 - 12:10","size":"5213"}],"folderContent":[{"name":"Folder 2","type":"folder","ext":"sql","modified":"2013\/04\/11 - 05:04","created":"2013\/04\/11 - 05:04","size":"1577"},{"name":"Folder 1","type":"folder","ext":"zip","modified":"2013\/04\/15 - 09:08","created":"2013\/04\/15 - 09:08","size":"11867"}],"files":9,"folders":2}

我想知道对象 json 中的访问值是什么。（例如，我想访问文件、文件夹、文件内容、文件夹内容的值）

我不知道。

Answer 1

JSON 是一个字典，您可以使用 NSJSONSerialization 将此字符串转换为字典：

NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:nil];

然后您可以通过键访问属性，以便获取文件夹内容数组：

NSArray *folderContent = [json objectForKey:@"folderContent"];