Ios Alamofire Swift 5:传递参数时引发错误

我的参数值在控制台中打印时如下所示，因此我得到一个错误：

失败（Alamofire.AFError.responseSerializationFailed（原因： Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailureReason（错误： 错误域=NSCOCAERRORDOMAIN Code=3840“周围的值无效 字符0。“UserInfo={NSDebugDescription=周围的值无效。” 字符（0.}）

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"{
                }
            }
        })

---

我如何在参数中没有“\”的情况下传递参数？有人能帮我吗？

在为我的上述问题搜索了数小时的解决方案后，我遇到了以下github链接：

他们对数据使用扩展，我在代码中应用了它，如下所示：

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

上述链接中使用的扩展代码副本如下所示，以供参考（如有）：

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)

/*印刷品： { “foo”：“bar”

---

}

在花了数小时寻找上述问题的解决方案之后，我发现了以下github链接：

他们对数据使用扩展，我在代码中应用了它，如下所示：

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

上述链接中使用的扩展代码副本如下所示，以供参考（如有）：

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)

/*印刷品： { “foo”：“bar” }