ObjectMapper toJson 为空

Question

我正在尝试使用 ObjectMapper 将对象反序列化为 JSON 字典，但反序列化函数总是 return 空对象。

class TimeEntryContainer: Mappable {

//MARK: Properties
var entry: TimeEntryObject = TimeEntryObject()

//MARK: Initializers
init() {}

init(_ issue: Issue, hours: Double, activityId: Int) {
    self.entry = TimeEntryObject(issue, hours: hours, activityId: activityId)
}

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

//MARK: Private Methods
func mapping(map: Map) {
    entry       <- map["time_entry"]
}    
}

class TimeEntryObject {

//MARK: Properties
var issueId = -1
var projectId = ""
var hours = Double()
var activityId = -1
var comments = ""

//MARK: Initializers
init() {}

init(_ issue: Issue, hours: Double, activityId: Int) {
    self.issueId = issue.id
    self.projectId = issue.project
    self.hours = hours
    self.activityId = activityId
}

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

//MARK: Private functions
func mapping(map: Map) {
    issueId         <- map["issue_id"]
    projectId       <- map["project_id"]
    hours           <- map["hours"]
    activityId      <- map["activity_id"]
    comments        <- map["comments"]
}
}

这是我填充 TimeEntryContainer 对象的部分

let timeEntry = TimeEntryContainer()
timeEntry.entry.projectId = (issue?.project)!
timeEntry.entry.activityId = activityId
timeEntry.entry.hours = timeEntered
timeEntry.entry.comments = commentEdit.text ?? ""

let deserialized = Mapper().toJSONString(timeEntry)
print("hours: \(deserialized) ")

即使我的 timeEntry 对象的值设置正确，函数 Mapper().toJSONString()、Mapper().toJSON() 甚至 timeEntry.toJSON() 和 timeEntry.toJSONString() return 一个空的 JSON 对象/字典。我找不到哪里出错了

Answer 1

您的 TimeEntryObject 必须是可映射的。您输入了方法，但没有在 class 声明中声明一致性。

class TimeEntryObject: Mappable

Answer 2

我有同样的问题，在我的例子中，我实现了 Mappable 协议。 Biut 我没有映射 class 的变量，这给了我空 json.

发布只是另一种选择/解决方案。可以在需要时帮助某人。

ObjectMapper toJson 为空

ObjectMapper toJson empty

json

ios

objectmapper

swift3