SwiftUI 我的类未正确注入

Question

我对 SwiftUI 相当陌生，我正在尝试构建一个小游戏来习惯语法，但我遇到了一个问题，我创建了一个类并在 @main 结构中创建了 3 个实例，但是当我尝试在我的视图中使用它们时，它们全部变成第一个实例

班级：

import Foundation

class WorkSpace: ObservableObject {
    var title: String
    var income: Int
    
    init(title: String, income: Int) {
        self.title = title
        self.income = income
    }
}

@主结构：

import SwiftUI

@main
struct LifeSimulationApp: App {
    @StateObject var doctor = WorkSpace(title: "Doctor", income: 60000)
    @StateObject var lawyer = WorkSpace(title: "Lawyer", income: 50000)
    @StateObject var carseller = WorkSpace(title: "Car Seller", income: 30000)
    @StateObject var player = MainPlayer()

    var body: some Scene {
        WindowGroup {
            ContentView()
                .environmentObject(doctor)
                .environmentObject(lawyer)
                .environmentObject(carseller)
                .environmentObject(player)
        }
    }

}

查看：

import SwiftUI

struct OccupationView: View {
    @EnvironmentObject var doctor: WorkSpace
    @EnvironmentObject var lawyer: WorkSpace
    @EnvironmentObject var carseller: WorkSpace
    @EnvironmentObject var player: MainPlayer

    var body: some View {
        NavigationView {
            Form {
                HStack {
                    Image(systemName: "text.book.closed.fill")
                        .resizable()
                        .frame(width: 50, height: 50)
                        .foregroundColor(.blue)
                        .padding()

                    Spacer()

                    Text(player.occupation)
                        .font(.title)
                        .padding()

                    Spacer()
                }

                Section {
                    Toggle("\(doctor.title) (\(doctor.income)€)", isOn: $player.isDoctorOn)

                    Toggle("\(lawyer.title) (\(lawyer.income)€)", isOn: $player.isLawyerOn)

                    Toggle("\(carseller.title) (\(carseller.income)€)", isOn: $player.isCarsellerOn)
                }
            }
            .navigationTitle(player.name)
        }
    }
}

struct OccupationView_Previews: PreviewProvider {
    static var previews: some View {
        OccupationView()
            .environmentObject(MainPlayer())
            .environmentObject(WorkSpace(title: "Doctor", income: 60000))
            .environmentObject(WorkSpace(title: "Lawyer", income: 50000))
            .environmentObject(WorkSpace(title: "Car Seller", income: 30000))
    }
}

预览： 在此输入图片描述

Answer 1

这是因为每种类型只能有一个

@EnvironmentObject

，因为编译器只检查类型。实际上，您可以根据需要命名环境变量，只要类型正确并且它会识别它即可。您有几个选择，最简单的就是创建一个包含您需要的所有 WorkSpace 对象的 ObservableObject。

根据您的用例，您还可以扩展环境值以包含医生、律师和您需要的任何其他内容。

或者您可以只在 inits 中传递 StateObjects。