Question

如何在不使用对象映射的情况下访问原始响应json数据。我有以下响应数据。它包含用于执行查询的nextSyncToken和项目集合（在items会话中）。

我创建了一个Item对象的对象映射，它表示items中的内容。但是，我还需要nextSyncToken字段。如何在没有对象映射的情况下访问它。由于syncToken与对象映射没有关系。我该如何处理这个问题。

{
  "kind": "calendar#events",
  "nextSyncToken": "COib8eSw78gCEOib8eSw78gCGAU=",
  "items": [
    {
      "id": "_74rk4cpg84o42b9k8or3gb9k74s34b9p8ks34b9m851kac9m64rk4ci36g",
      "created": "2010-04-16T11:09:31.000Z",
      "updated": "2010-04-16T11:10:27.487Z",
      "summary": "iCal test 1",
      "start": {
        "dateTime": "2010-03-16T21:00:00+08:00"
      },
      "end": {
        "dateTime": "2010-03-16T22:00:00+08:00"
      }
    },
    {
      "id": "_752j2h1j6cq4cba68csjeb9k8p33eba1692k4ba284qj8ea688rj2chh6c",
      "status": "confirmed",
      "created": "2011-10-18T09:36:02.000Z",
      "updated": "2011-10-18T09:36:02.000Z",
      "summary": "New Event",
      "start": {
        "dateTime": "2011-10-18T03:45:00+08:00"
      },
      "end": {
        "dateTime": "2011-10-18T08:15:00+08:00"
      }
    }
  ]
}

我的映射代码：

    let eventMapping = RKEntityMapping(forEntityForName: "SGEvent", inManagedObjectStore: managedObjectStore)

    eventMapping.addAttributeMappingsFromDictionary([
        "id":               "identifier",
        "summary":          "summary",
        "created":          "createdAt",
        "updated":          "updatedAt",
        "location":         "location",
        "description":      "notes",
        "start.date":       "allDayStart",
        "end.date":         "allDayEnd"
        ])

    let startTimeMapping = RKAttributeMapping(fromKeyPath: "start.dateTime", toKeyPath: "startTime")
    startTimeMapping.valueTransformer = self.googleDateTransformer
    eventMapping.addPropertyMapping(startTimeMapping)

    let endTimeMapping = RKAttributeMapping(fromKeyPath: "end.dateTime", toKeyPath: "endTime")
    endTimeMapping.valueTransformer = self.googleDateTransformer
    eventMapping.addPropertyMapping(endTimeMapping)

    eventMapping.identificationAttributes = ["identifier"]

    let responseDescriptor = RKResponseDescriptor(mapping: eventMapping, method: .GET,
        pathPattern: "calendars/:calendarId/events", keyPath: "items",
        statusCodes: RKStatusCodeIndexSetForClass(RKStatusCodeClass.Successful))

    objectManager.addResponseDescriptor(responseDescriptor)

我的请求操作：

  objectManager.getObjectsAtPath("calendars/\(identifier)/events",
        parameters: [self.ACCESS_TOKEN: accessToken], success: { (operation, results) -> Void in



            callback?(results: nil, error: nil)
        }) { (_, error) -> Void in
            print(error)
    }

Answer 1

通常，您会添加其他具有适当映射的响应描述符来处理此问题。

使用objectManager.getObjectsAtPath时，您可以获取原始数据，假设您有一些其他响应描述符，这将导致成功块被调用，方法是导航到HTTP操作中的响应数据（然后您可以如果你认为合适，请解压缩）：

operation.HTTPRequestOperation.responseData

（或使用responseString代替responseData）。

Answer 2

 if let dict = try? NSJSONSerialization.JSONObjectWithData(operation.HTTPRequestOperation.responseData, options: .AllowFragments) as? [String: AnyObject],
      let nextSyncToken = dict?["nextSyncToken"] as? String{
    print(nextSyncToken)//get the nextSyncToken
}

restkit，如何在没有对象映射的情况下访问对象

2 个答案: