SwiftUI

Question

我正在构建的一个小应用程序上使用 SwiftUI，但我运行遇到了 Codable 的问题，并且遇到了一些错误。

我有一个 JSON 文件，看起来像这样

[
    {
        "id": "",
        "name": "services",
        "items": [
            {
                "id": 0
                "businessName": "Some Name",
                "businessTelephone": "01234567890",
                "businessEmail": "email@gmail.com",
                "businessWebsite": "website.com",
                "businessLocation": { "latitude": "54.137256", "longitude": "-1.524727" },
                "travelLimit": 50,
                "description": "A description about some business",
                "categories": ["Category 1"]
            }
    }
]

我有一个看起来像这样的结构

struct Service: Hashable, Codable, Identifiable { 

    var id: Int
    var businessName: String
    var businessTelephone: String
    var businessEmail: String
    var businessWebsite: String
    var businessLocation: Array<Any>
    var travelLimit: Int
    var description: String
    var categories: [Category]

    enum Category: String, CaseIterable, Hashable, Codable {

        case category1 = "Category 1"
        case category2 = "Category 2"

    }

}

但是，我收到以下错误

Type 'Service' does not conform to protocol 'Decodable'
Type 'Service' does not conform to protocol 'Encodable'
Type 'Service' does not conform to protocol 'Equatable'
Type 'Service' does not conform to protocol 'Hashable'

Answer 1

Codable 不能有 Any ，再加上 businessLocation 是字典而不是数组，所以 Replace

var businessLocation: Array<Any>

和

var businessLocation:[String:String]

或

型号

// MARK: - Element
struct Root: Codable {
    let id, name: String
    let items: [Item]
}

// MARK: - Item
struct Service: Codable {
    let id: Int
    let businessName, businessTelephone, businessEmail, businessWebsite: String
    let businessLocation: BusinessLocation
    let travelLimit: Int
    let itemDescription: String
    let categories: [String]

    enum CodingKeys: String, CodingKey {
        case id, businessName, businessTelephone, businessEmail, businessWebsite, businessLocation, travelLimit
        case itemDescription = "description"
        case categories
    }
}

// MARK: - BusinessLocation
struct BusinessLocation: Codable {
    let latitude, longitude: String
}

解码

do {
    let res = try JSONDecoder().decode([Root].self, from: data)
    print(res)
}
catch {
    print(error)
}

SwiftUI - 类型 'Service' 不符合协议 'Decodable'

SwiftUI - Type 'Service' does not conform to protocol 'Decodable'

json

swift

codable