Error Domain = NSURLErrorDomain代码= -1009“ Internet连接似乎已离线

Question

我在邮递员中遇到了一个API，我得到的响应很好。但是，当我在我的iOS应用程序中点击相同的API时，它显示的响应为零，结果是错误。我已经打印了错误，它向我显示了此信息，Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline.我检查了我的互联网连接是否正常。如果可以，我已经搜索了其他站点的互联网连接。但是，它始终向我显示此错误。我感到困惑，为什么它向我显示此错误。我打api的代码是

class WalletDetailService{

static let instance = WalletDetailService()
var getWalletDetailModelArray = [WalletDetail]()
var status:Int = 0

func getWalletDetails(param:[String : String],completion:@escaping CompletionHandler){
    let header = [
        "auth": "2dd7cfb3c40b4830b72be2cc90276fd9"
    ]

    print(header)
   let url = URL(string: getWalletDetailsUrl)

    Alamofire.request(url!, method: .post, parameters: param, encoding: JSONEncoding.default, headers: header).responseJSON { (response) in
        print("Request: \(String(describing: response.request))")   // original url request
        print("Response: \(String(describing: response.response))") // http url response
        print("Result: \(response.result)")// response serialization result

        if response.result.error == nil{

            guard let data = response.data else {return}
            do{
                    if let json = try JSON(data: data).dictionary{
                        let  result = json["result"]?.dictionary
                        let monthlyRental = result!["monthly_rental"]?.intValue
                        print(monthlyRental!)
 }

                        completion(true)
                }

                completion(true)
            }catch let jsonErr{
                print(jsonErr)
            }

        }else{
            completion(false)
            debugPrint(response.result.error as Any)
        }
    }
}

}