我目前正在尝试实现到我的模型的映射，而我目前的做法没有产生任何结果。我有一个 MediaLibrary 类，它包含 2 个数组，“exerciseMedia”和“stretchMedia”，它们都包含一个“Media”对象数组。我选择了 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 类中我的两个数组的对象。
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"]
}
}
现在这是我尝试映射的 json 示例。请注意，我的模型同时具有“imageURI”和“videoURI”，因为有两种类型的媒体对象，但由于它们是可选的，因此可以解决这一问题。
{
"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将“ExerciseMedia”和“StretchMedia”的内容填充到我的 MediaLibrary 类中的 2 个数组到它们各自的数组中。我创建了一个函数，它向包含您刚才看到的 JSON 的路由发出请求(正文只需要培训师 ID)。到目前为止，我会发布我的代码。
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，所以有些地方不对。我的想法是，由于 MediaLibrary 具有“ExerciseMedia”和“StretchMedia”的映射，所以我需要做的就是在请求中使用 MediaLibrary，并且映射函数将自动处理您在 JSON 中看到的 2 个媒体 key 。我可能会完全错误地解决这个问题，但我知道我很接近，我们将不胜感激。
最佳答案
至于AlamofireObjectMapper的用法，对象响应已经映射到 json。所有你需要的只是称为 .value并准备好使用。
self.mediaLibrary = response.result.value
Mapper<MediaLibrary>().map() 的用法指的是 ObjectMapper 库本身。
关于ios - 使用 AlamofireObjectMapper 将对象 json 数据映射到 2 个单独的数组中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47920462/