Question

我目前正在尝试将映射工具应用到我的模型中，目前我做这件事的方式并没有产生任何结果。我有一个MediaLibrary类，它包含2个数组，＆＃39; exerciseMedia＆＃39;和＆＃39; stretchMedia＆＃39;他们都拥有一系列媒体＆＃39;对象。我选择 ObjectMapper / AlamofireObjectMapper 库将数据映射到我的模型。

import ObjectMapper

class MediaLibrary: Mappable {

    var exerciseMedia: [Media]?
    var stretchMedia: [Media]?

    required init?(map: Map) {
        mapping(map: map)
    }

    func mapping(map: Map) {
        exerciseMedia <- map["ExerciseMedia"]
        stretchMedia  <- map["StretchMedia"]
    }
}

这是Media对象，它将构成填充MediaLibrary类中两个数组的对象。

import ObjectMapper

struct Media: Mappable {

    var _id: String?
    var name: String?
    var desc: String?
    var imageURI: String?
    var videoURI: String?
    var trainerID: String?
    var isShoulders : Bool?
    var isNeck : Bool?
    var isLegs : Bool?
    var isHands : Bool?
    var isChest : Bool?
    var isCalves : Bool?
    var isButt : Bool?
    var isBack : Bool?
    var isArms : Bool?
    var isCore : Bool?
    var isFullBody : Bool?
    var isLowerBody : Bool?
    var isUpperBody : Bool?
    var isExercise : Bool?
    var isStretch : Bool?
    var equipmentNeeded : String?

    init?(map: Map){ }

    mutating func mapping(map: Map) {

        _id             <- map["_id"]
        name            <- map["name"]
        desc            <- map["desc"]
        imageURI        <- map["imageURI"]
        videoURI        <- map["videoURI"]
        trainerID       <- map["trainerID"]
        isShoulders     <- map["isShoulders"]
        isNeck          <- map["isNeck"]
        isLegs          <- map["isLegs"]
        isHands         <- map["isHands"]
        isChest         <- map["isChest"]
        isCalves        <- map["isCalves"]
        isButt          <- map["isButt"]
        isBack          <- map["isBack"]
        isArms          <- map["isArms"]
        isCore          <- map["isCore"]
        isFullBody      <- map["isFullBody"]
        isLowerBody     <- map["isLowerBody"]
        isUpperBody     <- map["isUpperBody"]
        isExercise      <- map["isExercise"]
        isStretch       <- map["isStretch"]
        equipmentNeeded <- map["equipmentNeeded"]
    }
}

现在这里是我想要映射的json的样本。请注意，我的模型有＆＃39; imageURI＆＃39;和＆＃39; videoURI＆＃39;因为有2种类型的媒体对象，但由于它们是可选项，因此它可以解释这一点。

{
    "StretchMedia": [
        {
            "_id": "5a380db7ee292409b4f44980",
            "name": "somephoto",
            "desc": "some description",
            "imageURI": "https://videofitapptestbucket.s3.us-west-2.amazonaws.com/100006166323",
            "trainerID": "5a32f62a28ce4acbc5fbbb4b",
            "__v": 0,
            "createdAt": "2017-12-18T18:49:27.009Z",
            "isShoulders": false,
            "isNeck": false,
            "isLegs": false,
            "isHands": false,
            "isChest": false,
            "isCalves": false,
            "isButt": false,
            "isBack": false,
            "isArms": false,
            "isCore": false,
            "isFullBody": false,
            "isLowerBody": false,
            "isUpperBody": false,
            "isExercise": false,
            "isStretch": true,
            "equipmentNeeded": "none"
        },
        {
            "_id": "5a380dfa089b2d09dcfa92db",
            "name": "somephoto",
            "desc": "some description",
            "videoURI": "https://videofitapptestbucket.s3.us-west-2.amazonaws.com/100002098677",
            "trainerID": "5a32f62a28ce4acbc5fbbb4b",
            "__v": 0,
            "createdAt": "2017-12-18T18:50:34.277Z",
            "isShoulders": false,
            "isNeck": false,
            "isLegs": false,
            "isHands": false,
            "isChest": false,
            "isCalves": false,
            "isButt": false,
            "isBack": false,
            "isArms": false,
            "isCore": false,
            "isFullBody": false,
            "isLowerBody": false,
            "isUpperBody": false,
            "isExercise": false,
            "isStretch": true,
            "equipmentNeeded": "none"
        }
    ],
    "ExerciseMedia": [
        {
            "_id": "5a345a356ec5fc0032651611",
            "name": "Juan",
            "desc": "pic of some Spanish guy",
            "imageURI": "https://videofitapptestbucket.s3.us-west-2.amazonaws.com/10000998839",
            "trainerID": "5a32f62a28ce4acbc5fbbb4b",
            "isStretchCore": false,
            "isExerciseCore": false,
            "__v": 0,
            "createdAt": "2017-12-15T23:26:45.461Z",
            "isShoulders": false,
            "isNeck": false,
            "isLegs": false,
            "isHands": false,
            "isChest": false,
            "isCalves": false,
            "isButt": false,
            "isBack": false,
            "isArms": false,
            "isCore": false,
            "isFullBody": true,
            "isLowerBody": false,
            "isUpperBody": false,
            "isExercise": true,
            "isStretch": false,
            "equipmentNeeded": "Dumbbells"
        }
    ],
}

我遇到的问题是如何使用＆＃34; ExerciseMedia＆＃34;的内容填充我的MediaLibrary类上的2个数组。和＆＃34; StretchMedia＆＃34;他们各自的阵列。我创建了一个函数，它向包含您刚刚看到的JSON的路径发出请求（正文只需要教练ID）。我到目前为止发布了我的代码。

import AlamofireObjectMapper

var mediaLibrary: MediaLibrary?

func setTrainerMediaLibrary(trainerID: String) {
        let body: [String: Any] = [
            "trainerID": trainerID
        ]

        Alamofire.request(TRAINER_MEDIA_ALL, method: .post, parameters: body, encoding: JSONEncoding.default, headers: HEADER).responseObject { (response: DataResponse<MediaLibrary>) in
            if response.result.error == nil {
                self.mediaLibrary = Mapper<MediaLibrary>().map(JSONObject: response.result.value)
            } else {
                print("Could not map JSON data to Media Library model")
                debugPrint(response.result.error as Any)
            }
        }
    }

MediaLibrary对象返回nil，所以事情并不正确。我的想法是，因为MediaLibrary已经映射了＆＃34; ExerciseMedia＆＃34;和＆＃34; StretchMedia＆＃34;我需要做的就是在请求中使用MediaLibrary，映射函数将自动处理您在JSON中看到的2个媒体键。我可能会对此完全错误，但我知道我很接近，任何帮助都会受到赞赏。

Answer 1

至于AlamofireObjectMapper的用法，对象响应已经映射到json。您只需将其称为.value即可使用。

self.mediaLibrary = response.result.value

Mapper<MediaLibrary>().map()的用法是指ObjectMapper库本身。

使用AlamofireObjectMapper将对象json数据映射到2个单独的数组中

1 个答案: