json - 从 JSON 中列出动态字典的 Swift 问题

Question

我正在尝试构建一个从 API 端点接收 JSON 对象的应用程序，然后我想在视图中列出它。我看过很多关于这个主题的视频，但是在每个视频中，他们都使用非常简单的 JSON 对象作为示例，因此他们编写的代码似乎并没有真正转移，无论我如何尝试格式化它都会给我错误. 代码如下

import SwiftUI
import Combine
import Foundation

public struct ActivityModel: Codable, Identifiable {
    public let id: Int
    public let name: String
    public let activity_desc: String?
}


public struct ActivitiesModel2: Codable {
    public let location: String
    public let popular: [String:ActivityModel]
}

public struct ActivitiesModel: Codable {
    public let activities: ActivitiesModel2
}

public class ActivityFetcher: ObservableObject {
    var activities: ActivitiesModel?

    init(){
        guard let url = URL(string: "https://mywebsite.com/api/loadapi") else { return }

        var urlRequest = URLRequest(url: url)
        urlRequest.httpMethod = "POST"

        URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in

            do {
                if let d = data {
                    let decodedLists = try JSONDecoder().decode(ActivitiesModel.self, from: d)
                    DispatchQueue.main.async {
                        self.activities = decodedLists
                    }
                } else {
                    print("No Data")
                }
            } catch {
                print("Error")
            }

        }.resume()
    }
}

struct ActivityGuestView: View {
    let networkingServiceGeneral = NetworkingServiceGeneral()

    @ObservedObject var viewRouter: ViewRouter

    @ObservedObject var fetcher = ActivityFetcher()

    var body: some View {
        // This is where my issues start
        List(fetcher.activities?.activities.popular) { result in
            VStack {
                Text(result.name)
                Text(result.activity_desc)
                    .font(.system(size: 11))
                    .foregroundColor(Color.gray)
            }
        }
    }
}

正如我所说，这段代码给了我 5 个错误。它们如下；

    - Initializer 'init(_:rowContent:)' requires that '(key: String, value: ActivityModel)' conform to Identifiable
    - Initializer 'init(_:rowContent:)' requires that '[String : ActivityModel]' conform to 'RandomAccessCollection'
    -Value of optional type '[String : ActivityModel]?' must be unwrapped to a value of type '[String : ActivityModel]'
    - Coalesce using '??' to provide a default when the optional value contains 'nil'
    - Force-unwrap using '!' to abort execution if the optional value contains 'nil'

其中一些错误有修复它的选项，但是当我按下修复它会添加代码但实际上并没有修复错误，所以我想还是只包含它们。我对 Swift 还是很陌生，但我知道其中的一些要求，特别是符合 Identifiable 的要求，但它说当我尝试添加标签时 struct ActivitiesModel 不符合 identifiable 并且 JSON 对象没有该部分没有 ID，因此我无法要求 ID 使其可识别。

任何帮助将不胜感激，这已经是一堵墙了。

编辑：这是 JSON

"activities": {
        "location": "Dallas",
        "popular": {
            "10": {
                "id": 38,
                "name": "Adventure Landing Dallas",
                "activity_desc": "Aquatic complex chain with additional land attractions including mini-golf, laser tag & go-karts.",
            },
            "12": {
                "id": 40,
                "name": "Jumpstreet",
                "activity_desc": "None provided.",
            },
        }
    }
}

标签： jsonswiftcombine