ios - 如何使用 SwiftyJson 在 1 NSObject 中初始化 json 中的多个字典

Question

我的 API 响应是这样的

{
"error": false,
"id": "6",
"user_id": 7,
"users": [
    {
        "user_id": 1,
        "username": "spiderman"
    },
    {
        "user_id": 7,
        "username": "wonderwoman"
    }
    ],
"info": [
    {
        "id": 471,
        "message": "abc",
        "age": 10,
    }
    ]
}

我知道如何在 NSOject 中初始化 id、user_id 和 error 的值。但是我不知道如何在同一个 NSObject 类中初始化 users 和 info 的数组。

现在我像这样初始化 JSON

import UIKit
import SwiftyJSON

class MyItem: NSObject {

    var userId : Int
    var error : Bool 
    var id : Int 

    init?(dict: [String :JSON]) {
        self.id = dict["id"]?.int ?? 0
        self.error = dict["error"]?.bool ?? false
        self.userId = dict["userId"]?.int ?? 0
    }
}

现在的问题是我不知道如何初始化 users 和 info 字典中的数据。我应该如何安排它以及如何在其他地方使用它类

请举个例子。

Answer 1

如下使用，

根类:-

import Foundation 
import SwiftyJSON


class RootClass : NSObject, NSCoding{

    var error : Bool!
    var id : String!
    var info : [Info]!
    var userId : Int!
    var users : [User]!


    /**
     * Instantiate the instance using the passed json values to set the properties values
     */
    init(fromJson json: JSON!){
        if json.isEmpty{
            return
        }
        error = json["error"].boolValue
        id = json["id"].stringValue
        info = [Info]()
        let infoArray = json["info"].arrayValue
        for infoJson in infoArray{
            let value = Info(fromJson: infoJson)
            info.append(value)
        }
        userId = json["user_id"].intValue
        users = [User]()
        let usersArray = json["users"].arrayValue
        for usersJson in usersArray{
            let value = User(fromJson: usersJson)
            users.append(value)
        }
    }

    /**
     * Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
     */
    func toDictionary() -> [String:Any]
    {
        let dictionary = [String:Any]()
        if error != nil{
            dictionary["error"] = error
        }
        if id != nil{
            dictionary["id"] = id
        }
        if info != nil{
            var dictionaryElements = [[String:Any]]()
            for infoElement in info {
                dictionaryElements.append(infoElement.toDictionary())
            }
            dictionary["info"] = dictionaryElements
        }
        if userId != nil{
            dictionary["user_id"] = userId
        }
        if users != nil{
            var dictionaryElements = [[String:Any]]()
            for usersElement in users {
                dictionaryElements.append(usersElement.toDictionary())
            }
            dictionary["users"] = dictionaryElements
        }
        return dictionary
    }

    /**
    * NSCoding required initializer.
    * Fills the data from the passed decoder
    */
    @objc required init(coder aDecoder: NSCoder)
    {
         error = aDecoder.decodeObject(forKey: "error") as? Bool
         id = aDecoder.decodeObject(forKey: "id") as? String
         info = aDecoder.decodeObject(forKey: "info") as? [Info]
         userId = aDecoder.decodeObject(forKey: "user_id") as? Int
         users = aDecoder.decodeObject(forKey: "users") as? [User]

    }

    /**
    * NSCoding required method.
    * Encodes mode properties into the decoder
    */
    func encode(with aCoder: NSCoder)
    {
        if error != nil{
            aCoder.encode(error, forKey: "error")
        }
        if id != nil{
            aCoder.encode(id, forKey: "id")
        }
        if info != nil{
            aCoder.encode(info, forKey: "info")
        }
        if userId != nil{
            aCoder.encode(userId, forKey: "user_id")
        }
        if users != nil{
            aCoder.encode(users, forKey: "users")
        }

    }

}

用户类别:-

import Foundation 
import SwiftyJSON


class User : NSObject, NSCoding{

    var userId : Int!
    var username : String!


    /**
     * Instantiate the instance using the passed json values to set the properties values
     */
    init(fromJson json: JSON!){
        if json.isEmpty{
            return
        }
        userId = json["user_id"].intValue
        username = json["username"].stringValue
    }

    /**
     * Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
     */
    func toDictionary() -> [String:Any]
    {
        let dictionary = [String:Any]()
        if userId != nil{
            dictionary["user_id"] = userId
        }
        if username != nil{
            dictionary["username"] = username
        }
        return dictionary
    }

    /**
    * NSCoding required initializer.
    * Fills the data from the passed decoder
    */
    @objc required init(coder aDecoder: NSCoder)
    {
         userId = aDecoder.decodeObject(forKey: "user_id") as? Int
         username = aDecoder.decodeObject(forKey: "username") as? String

    }

    /**
    * NSCoding required method.
    * Encodes mode properties into the decoder
    */
    func encode(with aCoder: NSCoder)
    {
        if userId != nil{
            aCoder.encode(userId, forKey: "user_id")
        }
        if username != nil{
            aCoder.encode(username, forKey: "username")
        }

    }

}

信息类:-

import Foundation 
import SwiftyJSON


class Info : NSObject, NSCoding{

    var age : Int!
    var id : Int!
    var message : String!


    /**
     * Instantiate the instance using the passed json values to set the properties values
     */
    init(fromJson json: JSON!){
        if json.isEmpty{
            return
        }
        age = json["age"].intValue
        id = json["id"].intValue
        message = json["message"].stringValue
    }

    /**
     * Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
     */
    func toDictionary() -> [String:Any]
    {
        let dictionary = [String:Any]()
        if age != nil{
            dictionary["age"] = age
        }
        if id != nil{
            dictionary["id"] = id
        }
        if message != nil{
            dictionary["message"] = message
        }
        return dictionary
    }

    /**
    * NSCoding required initializer.
    * Fills the data from the passed decoder
    */
    @objc required init(coder aDecoder: NSCoder)
    {
         age = aDecoder.decodeObject(forKey: "age") as? Int
         id = aDecoder.decodeObject(forKey: "id") as? Int
         message = aDecoder.decodeObject(forKey: "message") as? String

    }

    /**
    * NSCoding required method.
    * Encodes mode properties into the decoder
    */
    func encode(with aCoder: NSCoder)
    {
        if age != nil{
            aCoder.encode(age, forKey: "age")
        }
        if id != nil{
            aCoder.encode(id, forKey: "id")
        }
        if message != nil{
            aCoder.encode(message, forKey: "message")
        }

    }

}