有如下json数据

[{
   "id": 9,
   "code": "100000",
   "name": "北京市",
   "baiduCode": "131",
   "gaodeCode": "",
   "tengxunCode": "",
   "parentId": 8,
   "level": 2,
   "areas": [{
       "id": 10,
       "code": "100020",
       "name": "朝阳区",
       "baiduCode": "",
       "gaodeCode": "",
       "tengxunCode": "",
       "parentId": 9,
       "level": 3,
       "areas": null
   }, {
       "id": 13,
       "code": "100089",
       "name": "海淀区",
       "baiduCode": null,
       "gaodeCode": null,
       "tengxunCode": null,
       "parentId": 9,
       "level": 3,
       "areas": null
   }]
}, {
   "id": 12,
   "code": "300000",
   "name": "天津市",
   "baiduCode": null,
   "gaodeCode": null,
   "tengxunCode": null,
   "parentId": 11,
   "level": 2,
   "areas": null
}]

模型定义如下

import YYModel

@objcMembers // 一定要加这个，不然解析为空数据
class CityListModel: NSObject, NSCoding, YYModel {

    var areas: [CityListModel]?
    var baiduCode: String?
    var code: String = ""
    var gaodeCode: String = ""
    var ids: Int = 0
    var level: Int = 0
    var name: String = ""
    var parentId: Int = 0
    var tengxunCode: String = ""

    override init() {
        super.init()
    }
    
    required convenience init?(coder aDecoder: NSCoder) {
        self.init()
        self.yy_modelInit(with: aDecoder)
    }
    
    func encode(with aCoder: NSCoder) {
        self.yy_modelEncode(with: aCoder)
    }

    static func modelCustomPropertyMapper() -> [String : Any]? {
        return ["ids": "id"]
    }
    static func modelContainerPropertyGenericClass() -> [String : Any]? {
        // return ["areas": CityListModel.classForCoder()]
        return ["areas": CityListModel.self]
    }
    
    override var description: String {
        // return dictionaryWithValues(forKeys: ["code", "name"]).description // 打印指定字段
        return yy_modelDescription()
    }
    
    class func getSavePath() -> String {
        let docPath = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)[0] as NSString
        let path = (docPath as String) + "/cityList.plist"
        print(path)
        return path
    }
    
    class func saveCityModel(cityArr:[CityListModel]) {
        let path = getSavePath()
        NSKeyedArchiver.archiveRootObject(cityArr, toFile: path)
    }
    
    class func getCityModelFromDie() -> [CityListModel] {
        let cityModel = NSKeyedUnarchiver.unarchiveObject(withFile: getSavePath())
        return cityModel as! [CityListModel]
    }
}

使用

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let path = Bundle.main.path(forResource: "search", ofType: "json")!
        let str = try? String(contentsOfFile: path) as! String
        
        let cityArr = NSArray.yy_modelArray(with: CityListModel.self, json: str) as! [CityListModel]
        CityListModel.saveCityModel(cityArr: cityArr)
        sleep(2)
        print(CityListModel.getCityModelFromDie())
    }