Question

我尝试使用ObjectMapper将对象反序列化为JSON字典，但反序列化函数始终返回空对象。

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对象的值已正确设置，函数Mapper().toJSONString()，Mapper().toJSON()甚至timeEntry.toJSON()和timeEntry.toJSONString()也会返回一个空的JSON对象/字典。我无法找到我出错的地方

Answer 1

您的TimeEntryObject必须是Mappable。你输入了方法但没有在类声明中声明一致性。

class TimeEntryObject: Mappable

Answer 2

我遇到了同样的问题，就我而言，我实现了Mappable协议。 Biut我还没有映射class的变量，这给了我一个空的json。

仅作为另一个选项/解决方案发布。可能会在需要时帮助某人。

ObjectMapper toJson为空

2 个答案: