ios、alamofire中的响应处理问题

Question

我尝试使用 alamofire 进行 API 调用。当我像这样print(response.value ?? "") 打印response.value 时，我在Xcode 控制台中得到了正确的文本，但是在这行comletionHanlder(response.value as! [Order]) 中出现错误。

错误信息是Could not cast value of type '__NSDictionaryI' (0x7f81db0f3070) to 'AppName.Order' (0x10db3fb80)

static func getOrders( comletionHanlder: @escaping ([Order]) -> Void){
    let headers : HTTPHeaders = ["Authorization" : "Bearer \(User.current!.accessToken)",
                "Lang"          : "KA"]

    let urlStr = Constants.Api.baseUrl + Constants.Api.Routes.api + Constants.Api.Routes.doctorBooking + Constants.Api.Routes.getBookings

    AF.request(urlStr,
               method: .post,
               encoding: JSONEncoding.default,
               headers: headers).responseJSON{ response in

               if response.response?.statusCode == 400 {
                    comletionHanlder([])
                } else {
                if response.response?.statusCode == 200 {
                    print(response.value ?? "")
                    comletionHanlder(response.value as! [Order])
                }
          }
    }

;

struct Order: Codable {
    let title: String
    let details: String
    let BookingId: Int
}

当我打印 response.value 时，我收到了这条消息

(
    {
      title = "title"
      details = "details"
      BookingId = 10002
     },
     {
      title = "title1"
      details = "details1"
      BookingId = 10003
     }
)

Answer 1

如错误消息中所述，将response.value 转换为Order 将不起作用。您应该使用JSONDecodable 类来解码对所需订单列表的响应，如下所示：

guard let responseData = response.data else { /* do something */ }    
do {
    let orders = try JSONDecoder().decode([Order].self, from: responseData)
    debugPrint(orders)
} catch {
    // handle the error
}