ios、alamofire中的响应处理问题

Posted 2023-02-24

【中文标题】ios、alamofire中的响应处理问题

【英文标题】：respsonse Handling problem in ios, alamofire

【发布时间】：2020-05-16 17:13:25

【问题描述】：

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
     
)

【参考方案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

【讨论】：

我更改了我的代码，但也收到了错误keyNotFound(CodingKeys(stringValue: "title", intValue: nil), Swift.DecodingError.Context(codingPath: [_JSONKey(stringValue: "Index 0", intValue: 0)], debugDescription: "No value associated with key CodingKeys(stringValue: \"title\", intValue: nil) (\"title\").", underlyingError: nil))

我在我的Order struct codingKeys 中添加了这样的enum CodingKeys: String, CodingKey ...

@RezoJoglidze 似乎响应有一些空值。尝试将一些 Order 属性更改为可选项。例如：struct Order: Codable let title: String? let details: String? let BookingId: Int? public init(from decoder: Decoder) throws let values = try decoder.container(keyedBy: CodingKeys.self) title = try? values.decodeIfPresent(String.self, forKey: .title) details = try? values.decodeIfPresent(String.self, forKey: .details) BookingId = try? values.decodeIfPresent(Int.self, forKey: .BookingId)

我改变了一切，就像你上一个答案一样。在做，我写了这行print (orders).

我这样下单，每个字段都是nil [AppName.Order(title: nil, details: nil,BookingId: nil)]