Question

尝试使用Swift 4.2对此JSON进行解码时遇到很多麻烦：

{
    token = a3253e6ade9b5c7fd99673938bb28b3e;
    user =     {
        "about_me" = Admin;
        address = "";
        "banner_path" = "http://members.sharjahcd.ae/images/000/000/008/1540737652129.jpg?1541043871";
        company = "<null>";
        description = "<null>";
        email = "admin@stf.com";
        "events_count" = 0;
        "followers_count" = 0;
        "following_count" = 0;
        id = 2;
        "image_path" = "http://members.sharjahcd.ae/images/000/000/009/1540737834886.jpg?1541043896";
        "is_admin" = 1;
        major = "";
        "my_post_count" = 5;
        name = "Admin MemberPortal";
        "non_business_email" = "<null>";
        passedout = "";
        "phone_number" = 000000000;
        photos =         (
            "http://members.sharjahcd.ae/images/000/000/004/IMG_20181029_150700.jpg?1540805844",
            "http://members.sharjahcd.ae/images/000/000/012/20181028_173702.jpg?1541126171",
            "http://members.sharjahcd.ae/images/000/000/011/20181028_173703.jpg?1541126151",
            "http://members.sharjahcd.ae/images/000/000/010/20181028_173705.jpg?1541126144"
        );
        position = "<null>";
        role = Admin;
        stars = 3;
        "total_membership_points" = 0;
    };
}

这是如何尝试对其进行解码

let UserDatas = try JSONDecoder().decode(Token.self, from: data)
  print("response : \(UserDatas)")


struct Token: Decodable {
    let token: String
    let user: [Response]
}

struct Response: Decodable {
    let about_me: String
    let address: String
    let company: String
    let description: String
    let email: String
    let events_count: Int
    let followers_count: Int
    let following_count: Int
    let id = Int()
    let image_path: String
    let is_admin: String
    let major: String
    let my_post_count: Int
    let name: String
    let non_business_email: String
    let passedout: String
    let phone_number: Int
    let photos: [String]
    let position: String
    let role: String
    let stars: Int
    let total_membership_points: Int
}

它不起作用并出现以下错误：

typeMismatch（Swift.Array，Swift.DecodingError.Context（codingPath：[CodingKeys（stringValue：“ user”，intValue：nil）]]，debugDescription：“希望对Array进行解码，但是找到了一个字典。”，底层错误：nil ））

我如何制作将解码此JSON的结构？

Answer 1

在JSON中，用户属性不是数组，但是在代码中将其声明为数组（[Response]）。将您的代码更改为：

struct Token: Decodable {
    let token: String
    let user: Response
}

此外，如果您在代码中声明的任何属性为JSON中的null或缺失，则应将其设置为可选。

在您的JSON中，公司似乎为空，因此请更改

let company: String

到

let company: String?

并对其他可能为null或缺失的属性执行相同的操作。

Answer 2

您可能还想使用CodingKey。

struct Landmark: Codable {
    var name: String
    var foundingYear: Int
    var location: Coordinate
    var vantagePoints: [Coordinate]

    enum CodingKeys: String, CodingKey {
        case name = "title"
        case foundingYear = "founding_date"

        case location
        case vantagePoints
    }
}

请参阅：Encoding and Decoding Custom Types

Swift-“预期对Array <any>进行解码，但找到了字典。”

2 个答案: