Question

我在将数据（就像从端点获取的JSON一样）解析到Swift结构时遇到了困难。看来我从端点获取的数据不是有效的JSON（至少不是所有的数据都查看 object =（...）的结构），所以我无法解码{{ 1}}。

我应该用另一种方式解析它吗？任何建议，不胜感激

我准备的结构是：

ListStruct

我从端点获取的数据示例：

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?
}
...

编辑

我要如何解码：

["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]

我得到的错误：

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

Answer 1

很可能是通过使用字符串插值创建来传递错误的数据对象。如果response类型为Data，则无需在下面的行中重新创建它，

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

尝试按原样传递response。如下所示，

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

这是一个完整的可测试示例，其中使用有问题的json创建了正确的数据对象，并且error中的Response类型从Optional {{1} }到Bool，

Int

用法：

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?
}

输出：

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)
        })
}

JS对象到Swift Struct

1 个答案: