我正在尝试设置一个环境变量，如下文档：https://developer.apple.com/documentation/swiftui/environmentvalues
这是我的代码--
App.swift:

@main
struct GiniAppsApp: App {
    let persistenceController = PersistenceController.shared

        
    var body: some Scene {

        WindowGroup {
            
            ContentView()
                .environment(\.managedObjectContext, persistenceController.container.viewContext)
                .environment(\.hits, [])
        }
    }
}

private struct HitsArrayKey: EnvironmentKey {
    static let defaultValue: [Hit] = []
}

extension EnvironmentValues {
    var hits : [Hit] {
        get { self[HitsArrayKey.self] }
        set { self[HitsArrayKey.self] = newValue }
    }
}

extension View {
    func myCustomValue(_ myCustomValue: [Hit]) -> some View {
        environment(\.hits, myCustomValue)
    }
}

但是当我试图在视图中更改\更新变量时，我得到错误-

• 〉无法分配给属性：'hits'是一个只获取属性 *

下面是视图的代码：

struct ContentView: View {
    @Environment(\.managedObjectContext) private var viewContext
    @Environment(\.hits) private var hits: [Hit]
    
    var body: some View {
        
        Button(action: addItem) {
                        Label("GET", systemImage: "plus")
                        hits = []   //ERROR: Cannot assign to property: 'hits' is a get-only property 
                    }
        ...