为什么 SwifyJSON dictionaryValue 是空的？

Question

我正在使用 SwifyJSON 来解析通过 socket.io 发送到我的 iOS 应用程序的某些 JSON，响应的 .dictionaryValue 是 nil。服务器发送数据的方式如下：

socket.emit('hasBeenMatched', {user: JSON.stringify(currentUser)});

这是我的 iOS 应用程序中的内容：

    socket.on("hasBeenMatched", callback: {data, ack in
        println("got response after requesting match");

        let user = JSON(data!)
        println(user)
        println(user[0])
        println(user[0]["user"])
        println(user[0]["user"].dictionaryValue)

    })

这是该代码的输出：

got response after requesting match
[
  {
    "user" : "{\"_id\":\"5511c3d8abcdc2fcf7b8fe4b\",\"email\":\"j\",\"password\":null,\"firstname\":\"j\",\"lastname\":\"j\",\"age\":9,\"radius\":\"9\",\"__v\":0,\"wantsToBeMatched\":true,\"matchedWith\":\"k k\"}"
  }
]
{
  "user" : "{\"_id\":\"5511c3d8abcdc2fcf7b8fe4b\",\"email\":\"j\",\"password\":null,\"firstname\":\"j\",\"lastname\":\"j\",\"age\":9,\"radius\":\"9\",\"__v\":0,\"wantsToBeMatched\":true,\"matchedWith\":\"k k\"}"
}
{"_id":"5511c3d8abcdc2fcf7b8fe4b","email":"j","password":null,"firstname":"j","lastname":"j","age":9,"radius":"9","__v":0,"wantsToBeMatched":true,"matchedWith":"k k"}
[:]

在我的代码的另一个部分，我有以下代码：

let request = Alamofire.request(.POST, "http://localhost:3000/api/users/authenticate", parameters: params)
request.validate()
request.response { [weak self] request, response, data, error in
    if let strongSelf = self {
        // Handle various error cases here....

        var serializationError: NSError?

        if let json: AnyObject = NSJSONSerialization.JSONObjectWithData(data!, options: .AllowFragments, error: &serializationError) {
            println(JSON(json).dictionaryValue)

            // Story board navigation
        } else {
            //Handle error case
        }
    }
}

编辑：Alamofire 响应处理中 println 的输出如下所示：

[_id: 5511c3d8abcdc2fcf7b8fe4b, password: null, __v: 0, lastname: j, age: 9, wantsToBeMatched: true, firstname: j, radius: 9, email: j, matchedWith: k k]

我想知道的是：为什么 println(user[0]["user"].dictionaryValue) 会导致 [:]？

Answer 1

想通了，但我的解决方案与 SwiftyJSON（我仍然很好奇）无关。我更改了服务器通过套接字发送数据的方式。我将 socket.emit('hasBeenMatched', {user: JSON.stringify(currentUser)}); 更改为 socket.emit('hasBeenMatched', {user: currentUser});。本质上，我删除了手册 JSON-ification.

为什么 SwifyJSON dictionaryValue 是空的？

Why is SwifyJSON dictionaryValue empty?

json

swift

swifty-json