Alamofire 失败 - 响应序列化失败

Question

func postAd(cryptoo: String, fiatt: String,locationn: String,countryy: String,marginn: String,
            pricee: String,minlimitt: String,maxlimitt: String,paymrntwindoww: String,paymrntmethodd: String,
            accountdetailss: String,infoo: String,termss: String
){
                    
    let endpoint = "https://new.demozab.com/armup/api/public/api/post-trade"
    
   // let params = ["email":"[email protected]","password":"Test@123"]
    
    let params = [
        
        "crypto_currency_id":"1",
        "trade_type": "buy",
        "location": "",
        "country": "1",
        "market":"15",
        "margin":"1",
        "trade_price":"1",
        "min_transaction_limit":"1",
        "max_transaction_limit":"1",
        "payment_method":"1",
        "payment_window":"1",
        "account_details": "1",
        "additional_information":"1",
        "sunday_start":"",
        "sunday_end":"",
        "monday_start":"",
        "monday_end":"",
        "tuesday_start":"",
        "tuesday_end":"",
        "wednesday_start":"",
        "wednesday_end":"",
        "thursday_start":"",
        "thursday_end":"",
        "friday_start":"",
        "friday_end": "",
        "saturday_start": "",
        "saturday_end": "",
        "terms":"i",
        
    ]
     guard let url = URL(string: endpoint)
    else {

        print("Invalid URL")
        return
    }
    let headers: HTTPHeaders = [
        "Authorization": "Bearer TVfXc1gPZbLfruJ53Q7PkkSDjSXi6gXGWXkCXg6j",
        "Content-Type": "application/json"
    ]



    AF.request( url, method: .post, parameters: params,  headers: headers ).responseDecodable(of: CommonData.self) {
        (response) in
       
      print(response.result)
        /////////            
        
        }   
    
}

API响应：

{
    "success": true,
    "message": "Advertisement Posted Successfully!"
}

模型类：

import Foundation

// MARK: - CommonData
struct CommonData: Codable {
    let success: Bool
    let message: String
}

错误：

失败（Alamofire.AFError.responseSerializationFailed（原因：Alamofire.AFError.ResponseSerializationFailureReason.decodingFailed（错误：Swift.DecodingError.typeMismatch（Swift.String，Swift.DecodingError.Context（codingPath：[CodingKeys（stringValue：“消息”，intValue： nil)]，debugDescription：“预期解码字符串，但找到了字典。”，underlyingError：nil)))))

尝试发布 API 调用。

Answer 1

当您成功

POST

时，响应将是

CommonData

，正如您所拥有的那样。

但是，当出现一些错误时，您会得到

CommonData2

（见下文）。

例如，在您的

params

中，需要

"location": ""

。 与

"max_transaction_limit": "2"

类似，注意它 > 1。 在这些情况下，您必须解码

CommonData2

。

当你使用

let params = ["email":"[email protected]","password":"Test@123"]

时，你会得到

CommonData2

回应。

 struct CommonData2: Codable {
     let success: Bool
     let result: String?
     let message: Message
 }

 struct Message: Codable {
     let errors: [String: [String]]
 }

要解码这两种类型的响应，您可以尝试这种方法，使用

init(from decoder: Decoder)

， 对我有用：

 struct CommonData2: Codable {
     let success: Bool
     let result: String?
     let message: Message?
     var msg: String?
     
     enum CodingKeys: String, CodingKey {
         case success, message, result
     }
     
     init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
         self.result = try? container.decode(String.self, forKey: .result)
         self.success = try container.decode(Bool.self, forKey: .success)
         if let theMessage = try? container.decode(Message.self, forKey: .message) {
             self.message = theMessage
         } else {
             self.message = nil
         }
         if let theString = try? container.decode(String.self, forKey: .message) {
             self.msg = theString
         } else {
             self.msg = nil
         }
     }

 }