JS對象到Swift Struct

Question

我在將數據（就像從端點獲取的JSON一樣）解析到Swift結構時遇到了困難。 似乎我從端點獲取的數據不是有效的JSON（至少不是所有的對象都在查看object =（...）的結構），所以我無法解碼ListStruct 。

我應該以其他方式解析嗎？ 任何建議，不勝感激

我准備的結構是：

struct Response:Codable {
    let message:String?
    let list:ListStruct?
    let error:Bool?
}

struct ListStruct:Codable {
    let object1:[Object1]?
    let object2:[Object2]?
    let object3:[Object3]?
}

struct Object1:Codable {
id:Int?
name:String?
}
...

我從端點獲取的數據示例：

["message": <null>, "list": {
    object1 =     (
                {
            id = 1;
            name = "testing1";
        }
    );
    object2 =     (
                {
            files =             (
            );
            id = 1;
            name = "testing2-1";
            photos =             (
            );
        },
                {
            files =             (
            );
            id = 2;
            name = "testing2-2";
            photos =             (
            );
            systemId = 8;
        }
    );
    object3 =     (
                {
            id = 6;
            name = "testing3-1";
        },
                {

            id = 13;
            name = "testing3-2";
        }
    );
}, "error": 0]

---

編輯

我如何嘗試解碼：

if let result = try JSONDecoder().decode(Response?.self, from: "\(response!)".data(using: .utf8)! ) {
                        print("\(result)")
                    }

我得到的錯誤：

Error: dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840 "No string key for value in object around character 6." UserInfo={NSDebugDescription=No string key for value in object around character 6.})))

Answer 1

您很可能通過使用字符串插值創建來傳遞錯誤的數據對象。 如果response類型為Data則無需在下面的行中重新創建它，

if let result = try JSONDecoder().decode(Response?.self, from: "\(response!)".data(using: .utf8)! ) {

嘗試按原樣傳遞response 。 如下所示，

if let result = try JSONDecoder().decode(Response?.self, from: response!) {

---

這是一個完整的可測試示例，其中使用有問題的json創建正確的數據對象，並將Response error類型從Optional Bool更改為Int ，

struct Response:Codable {
    let message:String?
    let list:ListStruct?
    let error: Int?
}

struct ListStruct: Codable {
    let object1:[Object1]?
    let object2:[Object2]?
    let object3:[Object3]?
}

struct Object1: Codable {
    var id:Int?
    var name:String?
}

struct Object2: Codable {
    var id:Int?
    var name:String?
    var systemId: Int?
}

struct Object3: Codable {
    var id:Int?
    var name:String?
}

用法：

let data = """
{"message": null,

"list": {
"object1": [
{
"id": 1,
"name": "testing1"
}
],
"object2" :     [
{
"files" :             [
],
"id" : 1,
"name" : "testing2-1",
"photos" :             [
]
},
{
"files" :            [
],
"id" : 2,
"name" : "testing2-2",
"photos" :             [
],
"systemId" : 8
}
],
"object3" :     [
{
"id" : 6,
"name" : "testing3-1",
},
{

"id" : 13,
"name" : "testing3-2",
}
]
},

"error": 0
}
""".data(using: .utf8)!

if let result = try! JSONDecoder().decode(Response?.self, from: data) {
        result.list?.object1?.forEach({ obj in
            print(obj.name)
        })
        result.list?.object2?.forEach({ obj in
            print(obj.name)
        })
        result.list?.object3?.forEach({ obj in
            print(obj.name)
        })
}

輸出：

Optional("testing1")
Optional("testing2-1")
Optional("testing2-2")
Optional("testing3-1")
Optional("testing3-2")