我正在使用对象有效负载来处理JSON有效负载。但是我在对象内部编码对象时遇到麻烦。
我的有效载荷课程是这个
class ConversationPayload :BaseObject {
var title : String? = ""
var messageDict: MessagePayload = MessagePayload()
var participants: [Int32] = []
var type: String = ""
enum CodingKeys: String, CodingKey {
case title = "title"
case messageDict = "message"
case participants = "participants"
case type = "type"
}
override func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
if title != nil {
try container.encode(title, forKey: .title)
}
try container.encode(messageDict, forKey: .messageDict)
try container.encode(participants, forKey: .participants)
try container.encode(type, forKey: .type)
}
}
class MessagePayload: BaseObject {
var body : String = ""
var isVideocallInvite: Bool = false
var attachmentsPayload: MessageAttachmentPayload? = nil
enum CodingKeys: String, CodingKey {
case body = "body"
case isVideocallInvite = "is_videocall_invite"
case attachmentsPayload = "attachment"
}
override func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(body, forKey: .body)
try container.encode(isVideocallInvite, forKey: .isVideocallInvite)
if attachmentsPayload != nil {
try container.encode(attachmentsPayload, forKey: .attachmentsPayload)
}
}
}
class MessageAttachmentPayload: BaseObject {
var photo : String = ""
var photoType : String = "jpg"
}
BaseObject是这个
class BaseObject:Codable{}
我想要在JSON负载中获取的内容是这样的
{"message": {"body": "body_string", "is_videocall_invite": 1}, "participants" : [user-id], "type" : "converstation_type","title":"title"}
有人知道我的有效载荷类怎么了吗？尚未对编码感到熟悉。提前致谢。
我不确定您在这里受到什么限制，但是我会简化所有这些步骤。保持JSON数据模型尽可能接近JSON。
struct ConversationJsonModel: Codable {
var title: String?
var message: MessageJsonModel
var participants: [Int]
var type: String
}
struct MessageJsonModel: Codable {
var body: String
var is_videocall_invite: Int
var attachment: AttachmentJsonModel?
}
struct AttachmentJsonModel: Codable {
var photo: String
var photo_type: String // <-- assuming photo_type is the JSON member name.
}
如果您需要视图模型或其他某种本地数据模型，则这两部分是分开的。
class BaseObject {}
class ConversationPayload: BaseObject {
var title : String? = ""
var messageDict: MessagePayload = MessagePayload()
var participants: [Int32] = []
var type: String = ""
func makeConversationJsonModel() -> ConversationJsonModel {
ConversationJsonModel(title: title,
message: messageDict.makeMessageJsonModel(),
participants: participants.map { Int($0) },
type: type)
}
}
class MessagePayload: BaseObject {
var body : String = ""
var isVideocallInvite: Bool = false
var attachmentsPayload: MessageAttachmentPayload? = nil
func makeMessageJsonModel() -> MessageJsonModel {
MessageJsonModel(body: body,
is_videocall_invite: isVideocallInvite ? 1 : 0,
attachment: attachmentsPayload?.makeAttachmentJsonModel())
}
}
class MessageAttachmentPayload: BaseObject {
var photo : String = ""
var photoType : String = "jpg"
func makeAttachmentJsonModel() -> AttachmentJsonModel {
AttachmentJsonModel(photo: photo, photo_type: photoType)
}
}
最后，编码您的JSON
let conversationPayload = ConversationPayload()
let json = try? JSONEncoder().encode(conversationPayload.makeConversationJsonModel())
这允许在JSON表示和有效负载模型之间进行清晰的分离。例如，在JSON中，is_videocall_invite是Int（0或1）；同时，在有效负载模型中，isVideocallInvite是Bool。
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我来说两句