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当我调用 post 方法时,我有一个方法NotificationCenter

func processMessage(message: CocoaMQTTMessage) {
    Log.d("DestinationTopicHandler: handling message")
    //message.string: Contains the response of the server
    print(message.string!) // print the response (String)

    bus.post(name: .DestinationRespReceived, userInfo: [message.string! : String()])
}

这里我的 message.string 打印:

{  
   “req_token”:“测试”,
   “conv_token”:“测试”,
   "ts":"2017-04-05 12:00:00.123",
   “代码”:0,
   "message":"ACCESO CONCEDIDO",
   “auth_token”:“测试”,
   “回复”:{  
      “类型”:“测试”,
      “数据”:{  
         “命运”:[  
            {  
               "idDestino":"1",
               “desDestino”:“亚松森”
            },
            {  
               "idDestino":"2",
               “desDestino”:“迈阿密”
            }
         ]
      }
   }
}

这是我的 post 方法声明:

func post(name: Notification.Name, userInfo info : [AnyHashable : Any]? = nil) {
    NotificationCenter.default
        .post(name: name, object: nil, userInfo: info)
}

到目前为止一切正常。这是我尝试访问 userInfo 数据的最后一种方法:

public func responseReceived(_ notification: Notification) {
    if processed {
        return
    }

    processed = true
    responseReceived = true
    Log.i("responseReceived:")

    guard let userInfo = notification.userInfo, let msg = userInfo["idDestino"] as? String else {
            Log.v("No userInfo found in notification")
            callback.onResponseReceived(nil)

            return
    }

    if let json = msg.json {
        callback.onResponseReceived(Response_Base(json: json.dictionary))
    } else {
        Log.v("Could not parse msg")
        callback.onResponseReceived(nil)
    }
}

问题是我不知道为什么程序总是返回“No userInfo found in notification”。任何人都可以帮助我吗?

我的 userInfo 输出是:

[AnyHashable("{ \n \"req_token\":\"test\",\n \"conv_token\":\"test\",\n \"ts\":\"2017-04-05 12: 00:00.123\",\n \"code\":0,\n \"message\":\"ACCESO CONCEDIDO\",\n \"auth_token\":\"jakldsfjalkdfj\",\n \"响应\":{ \n \"type\":\"test\",\n \"data\":{ \n \"destinos\":[ \n { \n \"idDestino\":\"1 \",\n \"desDestino\":\"ASUNCION\"\n },\n { \n \"idDestino\":\"2\",\n \"desDestino\":\"MIAMI\" \n }\n ]\n }\n }\n}"): ""]

4

1 回答 1

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好的...我解决了我的问题...感谢@martin R

问题是这一行:

 bus.post(name: .DestinationRespReceived, userInfo: [message.string! : String()])

我没有意识到键是我的 userInfo 的第一个元素,第二个元素是值。所以我更正了我的 userInfo 位置的元素,如下所示:

bus.post(name: .DestinationRespReceived, userInfo: ["msg" : message.string!])

所以...在我的 funcresponseReceived现在是正确的:

 guard let userInfo = notification.userInfo, let msg = userInfo["msg"] as? String else {

            Log.v("No userInfo found in notification")
            callback.onResponseReceived(nil)

            return
    }

谢谢!

于 2017-07-19T19:58:52.710 回答