Alamofire Swift 5：传递参数时抛出错误

Posted 2023-03-10

【中文标题】Alamofire Swift 5：传递参数时抛出错误

【英文标题】：Alamofire Swift 5 : Throws an error while passing parameter

【发布时间】：2020-05-29 06:41:00

【问题描述】：

我的参数值在控制台中打印时如下所示：

失败（Alamofire.AFError.responseSerializationFailed（原因： Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed（错误： 错误域=NSCocoaErrorDomain 代码=3840“周围的值无效 字符 0。” UserInfo=NSDebugDescription=无效值 字符 0.)))

["preparation_method[]": "[\"method_stage\":\"0\",\"method_description\":\"This is test methof1\"]", "recipe_id": "10454", "ingredients[]": "[\"ingredient_unit_id\":\"Cup\",\"ingredient_item_id\":\"1\",\"ingredient_item\":\"Rice\",\"ingredient_remark\":\"\",\"ingredient_qty\":\"1\",\"ingredient_unit_id\":\"\",\"ingredient_item_id\":\"2\",\"ingredient_item\":\"\",\"ingredient_remark\":\"\",\"ingredient_qty\":\"\",\"ingredient_unit_id\":\"\",\"ingredient_item_id\":\"3\",\"ingredient_item\":\"\",\"ingredient_remark\":\"\",\"ingredient_qty\":\"\"]"]

参数的格式如下所示：

["recipe_id" : "10454", 
ingredients[]: ["ingredient_unit_id":"Cup","ingredient_item_id":"1","ingredient_item":"Rice","ingredient_remark":"","ingredient_qty":"1",
"ingredient_unit_id":"","ingredient_item_id":"2","ingredient_item":"","ingredient_remark":"","ingredient_qty":"",
"ingredient_unit_id":"","ingredient_item_id":"3","ingredient_item":"","ingredient_remark":"","ingredient_qty":""],
 preparation_method[] : 
["method_stage":"0","method_description":"This is test methof1"] ]

我使用的代码是

let arr = ingredient.map( Model(ingredient_item: $0,
                                  ingredient_item_id: $1,
                                  ingredient_qty: $2,
                                  ingredient_unit_id: $3,
                                  ingredient_remark: $4))

        let jsonData = try! JSONEncoder().encode(arr)
        let jsonString = String(data: jsonData, encoding: .utf8)
        let ingredientstring = jsonString?.replacingOccurrences(of: "'\'" , with: "")
        let ingredientarrayvalue = "\(ingredientstring!)"
        print(ingredientarrayvalue)
        let ingredient_array = String(ingredientarrayvalue)


        let arr1 = prepatation.map( Model1(method_stage: $0,
                                  method_description: $1))

        let jsonData1 = try! JSONEncoder().encode(arr1)
        let jsonString1 = String(data: jsonData1, encoding: .utf8)
        let preparationstring = jsonString1?.replacingOccurrences(of: "'\'" , with: "")
        let preparationarrayvalue = "\(preparationstring!)"
        print(preparationarrayvalue)
        let preparation_array = String(preparationarrayvalue)


        let parameter = ["recipe_id" : recipevalue, "ingredients[]" : ingredient_array, "preparation_method[]" : preparationarrayvalue]
        print(parameter)

 let url = RECIPE.recipeSAVEURL
  AF.request(url, method: .post, parameters: parameter).responseJSON(completionHandler: response in

            print(response)
            if let response_data = response.value as? NSDictionary

                let responsestatus = response_data.value(forKey: "response") as! String
                print(responsestatus)

                if responsestatus == "success"
                
            
        )

如何传递参数中没有“\”的参数？谁能帮我解决这个问题？

【参考方案1】：

在为我的上述问题寻找解决方案后，我发现了以下 github 链接：https://gist.github.com/cprovatas/5c9f51813bc784ef1d7fcbfb89de74fe

他们使用数据扩展的地方，我在我的代码中应用它如下：

let preparation_array = jsonString1!.data(using: .utf8)!.prettyPrintedJSONString!
let ingredient_array = jsonString!.data(using: .utf8)!.prettyPrintedJSONString!

上面提到的链接中使用的扩展代码的副本在下面给出以供参考，如果有的话：

extension Data 
    var prettyPrintedJSONString: NSString?  /// NSString gives us a nice sanitized debugDescription
        guard let object = try? JSONSerialization.jsonObject(with: self, options: []),
              let data = try? JSONSerialization.data(withJSONObject: object, options: [.prettyPrinted]),
              let prettyPrintedString = NSString(data: data, encoding: String.Encoding.utf8.rawValue) else  return nil 

        return prettyPrintedString
    


let str = "\"foo\": \"bar\"".data(using: .utf8)!.prettyPrintedJSONString!
debugPrint(str)

/* 打印： “富”：“酒吧”