json - 我如何从主视图调用可映射类中的变量

Question

我有三个类，第一个是主视图，这是它的代码

    class ViewController: UIViewController {

    override func viewDidLoad() {
            super.viewDidLoad()
            getJSONS().getLowerJSON()

            setupUI()

    }
 func setupUI(){
    print(lowerData.companyName)
}
    }

getsJSONS 调用一个调用 almofire 的函数来处理此代码中的 json

class getJSONS {
func getLowerJSON(){

        let URL = "http://tickerchart.com/interview/company-details.json"
        Alamofire.request(URL).responseObject { (response: DataResponse<lowereViewResponse>) in

            let lowereViewResponse = response.result.value

        }

    }
}

lowereViewResponse 在此代码中调用可映射类

class lowereViewResponse: NSObject, Mappable {
    var companyName :  String?
    var symbol : String?
    var tradesCount : Int?
    var high : Int?
    var low : Int?
    var volume : Int?
    var amount :  Int?

    override init() {
        super.init()
    }

    convenience required init?(_ map: Map) {
        self.init()
    }


    func mapping(map: Map) {
        companyName <- map["company-name"]
        symbol <- map["symbol"]
        tradesCount <- map["trades-count"]
        high <- map["high"]
        low <- map["low"]
        volume <- map["volume"]

    required init?(map: Map){
        companyName = ""
        symbol = ""
        tradesCount = 0
        high = 0
        low = 0
        volume = 0
        amount = 0
        price = 0
    }


}

所有导入完成

我正在尝试调用类 lowereViewResponse 来访问变量，但是当它退出“print(lowerData.companyName)”时我得到 null

Answer 1

您可以像下面这样使用:

let lowereViewObject: lowereViewResponse = Mapper< lowereViewResponse >().map(JSON: result)