我正在尝试从json响应中获取数据，响应格式如下所述。我想获取“收件人”字典，并且需要显示在table.each单元格中，包含名称以及唯一的ID和图像。如何在本地词典中将这本词典翻译成故事？
{
"success": 1,
"status": 200,
"data": {
"chat": [
{
"id": 5,
"status": 0,
"created_at": "2019-02-19 13:29:15",
"updated_at": "2019-02-19 13:29:15",
"recipient": {
"id": 5,
"unique_id": "10004",
"name": "Pandu",
"avatar": "https://www.planetzoom.co.in/img/default_avatar_female.png"
},
"conversation": {
"id": 67,
"chat_id": 5,
"user_id": 4,
"type": 0,
"message": "I have sent a msg now",
"status": 0,
"created_at": "2019-02-26 04:02:20"
}
},
{
"id": 3,
"status": 0,
"created_at": "2019-02-19 13:17:49",
"updated_at": "2019-02-19 13:17:49",
"recipient": {
"id": 8,
"unique_id": "10007",
"name": "Mahitha",
"avatar": "https://www.planetzoom.co.in/storage/user/avatar/cZt9yQlBzIEewOdQ1lYZhl3dFiOv2k3bxG7HLOzR.jpeg"
},
"conversation": {
"id": 57,
"chat_id": 3,
"user_id": 4,
"type": 0,
"message": "Hi",
"status": 0,
"created_at": "2019-02-24 13:04:29"
}
},
{
"id": 2,
"status": 0,
"created_at": "2019-02-19 07:59:05",
"updated_at": "2019-02-19 07:59:05",
"recipient": {
"id": 1,
"unique_id": "1111",
"name": "Angadi World Tech",
"avatar": "https://www.planetzoom.co.in/storage/user/avatar/NlVzdUAfmLfIG9677szYZz7NkWyY4ULHAqnlCiiV.png"
},
"conversation": {
"id": 21,
"chat_id": 2,
"user_id": 4,
"type": 0,
"message": "Hi\\uD83D\\uDE0A",
"status": 0,
"created_at": "2019-02-21 10:35:26"
}
}
]
}
}
答案 0 :(得分：1)
我认为解码json的最佳方法是使用<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<p><input data-bind="value: myNumberOne, event: { change: myNumberOneChanged }" /> Textbox 1</p>
<p><input data-bind="value: myNumberTwo, event: { change: myNumberTwochanged }" /> Textbox 2</p>
我创建了一些结构来表示数据并对其进行解码，请注意，此json无效，因此必须将其包装在Codable
这是json：
{}以下是结构：
let jsonString = """
{
"chat": [
{
"id": 12,
"status": 0,
"created_at": "2019-02-22 04:57:12",
"updated_at": "2019-02-22 04:57:12",
"recipient": {
"id": 26,
"unique_id": "10024",
"name": "Kaverinew",
"avatar": "https://www.planetzoom.co.in/storage/user/avatar/1PyI4ceM3zPsG1fxbfatktWUT75sOE2Ttah8ctIp.png"
},
"conversation": {
"id": 65,
"chat_id": 12,
"user_id": 4,
"type": 1,
"message": "https://www.planetzoom.co.in/storage/chat/message/e759KWdSBegwXslAoS2xst0lohbbjNZMdpVnbxQG.png",
"status": 0,
"created_at": "2019-02-25 15:39:24"
}
},
{
"id": 6,
"status": 0,
"created_at": "2019-02-20 07:16:35",
"updated_at": "2019-02-20 07:16:35",
"recipient": {
"id": 7,
"unique_id": "10006",
"name": "Hema",
"avatar": "https://www.planetzoom.co.in/img/default_avatar_female.png"
},
"conversation": {
"id": 44,
"chat_id": 6,
"user_id": 4,
"type": 1,
"message": "https://www.planetzoom.co.in/storage/chat/message/qJjOtCRcBKBuq3UKaKVuVOEIQhaVPeJr3Bd4NoLo.png",
"status": 0,
"created_at": "2019-02-22 10:17:49"
}
}
]
}
这是解码方法：
struct Recipient: Codable {
var identifier: Int
var unique_id: Int
var name: String
var avatar: String
enum CodingKeys: String, CodingKey {
case identifier = "id"
case unique_id = "unique_id"
case name = "name"
case avatar = "avatar"
}
}
struct Conversation: Codable {
var identifier: Int
var chat_id: Int
var user_id: Int
var conversationType: Int
var message: String
var status: Int
var created_at: String
enum CodingKeys: String, CodingKey {
case identifier = "id"
case chat_id = "chat_id"
case user_id = "user_id"
case conversationType = "type"
case message = "message"
case status = "status"
case created_at = "created_at"
}
}
struct Chat: Codable {
var identifier: Int
var status: Int
var created_at: String
var updated_at: String
enum CodingKeys: String, CodingKey {
case identifier = "id"
case status = "status"
case created_at = "created_at"
case updated_at = "updated_at"
}
}
struct RootObject: Codable {
var chats: [Chat]
enum CodingKeys: String, CodingKey {
case chats = "chat"
}
}
答案 1 :(得分：0)
假设您已经有一个表示JSON的Data对象，则可以使用JSONSerialization将其转换为具体的Swift对象。完成此操作后，您只需要逐步操作并提取数据即可。像下面这样的东西应该很好用：
func retrieveRecipients(jsonData: Data?) throws -> [[String: Any]] {
guard let data = jsonData else { throw NSError(domain: "Parsing Recipients", code: 404, userInfo: ["dev_message": "Null JSON data inserted"]) }
guard let parsedJSON = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) else { throw NSError(domain: "Parsing Recipients", code: 500, userInfo: ["dev_message": "Data could not be parsed as JSON"]) }
guard let object = parsedJSON as? [String: Any] else { throw NSError(domain: "Parsing Recipients", code: 500, userInfo: ["dev_message": "Parsed JSON is not a dictionary"]) }
guard let items = object["chat"] as? [[String: Any]] else { throw NSError(domain: "Parsing Recipients", code: 404, userInfo: ["dev_message": "JSON is missing \"chat\" array"]) }
return items.compactMap { $0["recipient"] as? [String: Any] }
}
这就是所有安全功能。否则，您可以很快完成此操作：
func retreiveRecipientsStrict(jsonData: Data?) -> [[String: Any]] {
return ((try! JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [String: Any])["chat"] as! [[String: Any]]).compactMap { $0["recipient"] as? [String: Any] }
}
但是如果出现错误，这将导致崩溃，并且调试出问题的地方将非常困难。