我有一个应用程序,尝试使用UserDefaults
在本地保存 Codable模型,但问题是UserDefault
不能存储所有的values
模型,并为其中一些分配nil
,有时还会分配适当的value
。因此,我决定尝试使用领域的替代方法,并且能够修改我的模型以使其与 realm 一起使用,但是我没有一个问题位于进程的 中,使用域解码 Object 中的 Object 。使用Array
处理List
对象,但不能成功array
对象时,我只能使其工作失败映射到 JSON
下面是我正在处理的示例数组
{
"id": 732,
"name": "Vendor Name",
"logo": ".../thumb/missing.png",
"kitchens":
{
"id": 36,
"name": "Sandwiches"
}
}
模型类
class VendorsList : Object, Decodable {
@objc dynamic var id : Int = 0
@objc dynamic var name : String?
@objc dynamic var logo : String?
// Create your Realm List.
var kitchensList = List<VendorKitchens>()
override class func primaryKey() -> String? {
return "id"
}
private enum CodingKeys: String, CodingKey {
case id
case name
case logo
// Set JSON Object Key
case kitchensList = "kitchens"
}
public required convenience init(from decoder: Decoder) throws {
self.init()
let container = try decoder.container(keyedBy: CodingKeys.self)
self.id = try container.decode(Int.self, forKey: .id)
self.name = try container.decode(String.self, forKey: .name)
self.logo = try container.decode(String.self, forKey: .logo)
// Map your JSON Array response
let kitchens = try container.decodeIfPresent([VendorKitchens].self, forKey: .kitchensList) ?? [VendorKitchens()]
kitchensList.append(objectsIn: kitchens)
}
}
class VendorKitchens : Object, Decodable {
@objc dynamic var id : Int = 0
@objc dynamic var name : String?
override class func primaryKey() -> String? {
return "id"
}
private enum CodingKeys: String, CodingKey {
case id
case name
}
}
此returns
是错误
无法将数据映射到JSON
答案 0 :(得分:1)
在这里,尝试这个。
class VendorsList : Object, Decodable {
@objc dynamic var id : Int = 0
@objc dynamic var name : String?
@objc dynamic var logo : String?
@objc dynamic var kitchens: VendorKitchens? = nil
override class func primaryKey() -> String? {
return "id"
}
private enum CodingKeys: String, CodingKey {
case id
case name
case logo
case kitchens = "kitchens"
}
public required convenience init(from decoder: Decoder) throws {
self.init()
let container = try decoder.container(keyedBy: CodingKeys.self)
self.id = try container.decode(Int.self, forKey: .id)
self.name = try container.decode(String.self, forKey: .name)
self.logo = try container.decode(String.self, forKey: .logo)
kitchens = try container.decodeIfPresent(VendorKitchens.self, forKey: .kitchensList)
}
}
class VendorKitchens : Object, Decodable {
@objc dynamic var id : Int = 0
@objc dynamic var name : String?
override class func primaryKey() -> String? {
return "id"
}
private enum CodingKeys: String, CodingKey {
case id
case name
}
}