测试代码

//
//  TwoViewController.swift
//  XJL
//
//  Created by Nicky Y M LIU_SP on 2020/11/17.
//  Copyright © 2020 Nicky Y M LIU_SP. All rights reserved.
//

import UIKit

class TwoViewController: UIViewControll//
//  TwoViewController.swift
//  XJL
//
//  Created by Nicky Y M LIU_SP on 2020/11/17.
//  Copyright © 2020 Nicky Y M LIU_SP. All rights reserved.
//

import UIKit

class TwoViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = .white
        // Do any additional setup after loading the view.
    }
    


    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        self.test()
    }
    
    
    func test() {
      let str = """
        [ { "experiment_id" : "EXP_AB", "feature" : "mobile_new_payment_page", "groups" : { "test_group" : [ "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20" ], "control_group" : [] } }, { "experiment_id" : "EXP_AB", "feature" : "hyperwallet_display_toggle_new", "groups" : { "test_group" : [ "20", "00", "01", "02",                 "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "16", "17", "18", "19", "15" ], "control_group" : [] } }, { "experiment_id" : "EXP_AB", "feature" : "payment_top_up_remove_10_experiment", "groups" : { "test_group" : [ "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10" ], "control_group" : [ "11", "12", "13", "14", "15", "16", "17", "18", "19", "20" ] } }, { "experiment_id" : "EXP_AB", "feature" : "language_challenge_toggle", "groups" : { "test_group" : [ "00" ], "control_group" : [] } }, { "experiment_id" : "EXP_AB", "feature" : "onboarding_mobile_toggle", "groups" : { "test_group" : [ "00", "01", "03" ], "control_group" : [] } }, { "experiment_id" : "EXP_AB", "feature" : "lesson_invitation_package_toggle", "groups" : { "test_group" : [ "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20" ], "control_group" : [] } }, { "experiment_id" : "EXP_AB", "feature" : "classroom_pip_model_enable", "groups" : { "test_group" : [ "00" ], "control_group" : [ "20", "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "16", "17", "18", "19", "15" ] } } ]
        """
        
        //
        if let object: [RootClass] = MGHelper<[RootClass]>.transFormObject(jsonString: str) {
            // 模型再转成JSON字符串
            let jsonStr = object.array?.json
            print(jsonStr)
            UserDefaults.standard.set(jsonStr, forKey: "HHHH")
            UserDefaults.standard.synchronize()
            
            DispatchQueue.main.asyncAfter(deadline: .now()+0.5) {
                // 取出字符串
                let userStr = UserDefaults.standard.value(forKey: "HHHH")
                print(userStr)
                
                // 转成模型
                if let object1: [RootClass]  = MGHelper<[RootClass]>.transFormObject(jsonString: userStr as! String) {
                    print("end")
                }
            }
        }
    }
}


extension Array {
    var json: String? {
        do {
            let data = try JSONSerialization.data(withJSONObject: self, options: .prettyPrinted)
            return String(data: data, encoding: String.Encoding.utf8)
        } catch {
            return nil
            
        }
    }
}

extension Encodable {
    var array: [Any]? {
        do {
            guard let data = try? JSONEncoder().encode(self) else { return nil }
            return (try? JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.fragmentsAllowed)).flatMap{$0 as? [Any]}
        } catch {
            return nil
            
        }
    }
    
    var dictionary: [String: Any]? {
        do {
            guard let data = try? JSONEncoder().encode(self) else { return nil }
            return (try? JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.fragmentsAllowed) as? [String : Any])
        } catch {
            return nil
            
        }
    }
}
    
class MGHelper<T:Codable> {
    static func transFormObject<T:Codable>(jsonString: String) -> T? {
        if let data  = jsonString.data(using: .utf8) {
            let objects = try? JSONDecoder().decode(T.self, from: data)
            return objects
        }else {
            return nil
        }
    }

    // JSONString转换为字典
    ///
    /// - Parameter jsonString:
    /// - Returns: 
    func getDictionaryFromJSONString(jsonString:String) ->NSDictionary{

        let jsonData:Data = jsonString.data(using: .utf8)!

        let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
        if dict != nil {
            return dict as! NSDictionary
        }
        return NSDictionary()
    }
    
    // JSONString转换为字典
    ///
    /// - Parameter jsonString: <#jsonString description#>
    /// - Returns: <#return value description#>
    func getArrayFromJSONString(jsonString:String) -> Array<Any> {

        let jsonData:Data = jsonString.data(using: .utf8)!

        let dict = try? JSONSerialization.jsonObject(with: jsonData, options: .mutableContainers)
        if dict != nil {
            return dict as! Array
        }
        return Array()
    }
}


extension Array {
    var json: String? {
        do {
            let data = try JSONSerialization.data(withJSONObject: self, options: .prettyPrinted)
            return String(data: data, encoding: String.Encoding.utf8)
        } catch {
            return nil
            
        }
    }
}

extension Encodable {
    var array: [Any]? {
        do {
            guard let data = try? JSONEncoder().encode(self) else { return nil }
            return (try? JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.fragmentsAllowed)).flatMap{$0 as? [Any]}
        } catch {
            return nil
            
        }
    }
    
    var dictionary: [String: Any]? {
        do {
            guard let data = try? JSONEncoder().encode(self) else { return nil }
            return (try? JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.fragmentsAllowed) as? [String : Any])
        } catch {
            return nil
            
        }
    }
}

struct Group : Codable {

    let controlGroup : [String]?
    let testGroup : [String]?


    enum CodingKeys: String, CodingKey {
        case controlGroup = "control_group"
        case testGroup = "test_group"
    }
    
    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        controlGroup = try values.decodeIfPresent([String].self, forKey: .controlGroup)
        testGroup = try values.decodeIfPresent([String].self, forKey: .testGroup)
    }


}

struct RootClass : Codable {

    let experimentId : String?
    let feature : String?
    let groups : Group?


    enum CodingKeys: String, CodingKey {
        case experimentId = "experiment_id"
        case feature = "feature"
        case groups = "groups"
    }
    init(from decoder: Decoder) throws {
        let values = try decoder.container(keyedBy: CodingKeys.self)
        experimentId = try values.decodeIfPresent(String.self, forKey: .experimentId)
        feature = try values.decodeIfPresent(String.self, forKey: .feature)
        groups = try values.decode(Group.self, forKey: .groups)
    }


}