显示基于状态的披露组视图

我认为您没有向绑定传递正确的值,我可以在ContentView中看到您的代码后清楚地告诉您,因为您在问题中没有附加代码,但您可以复制粘贴到代码下面,并根据需要进行自定义。

ContentView

import SwiftUI

struct ContentView: View {
    
    // MARK: - PROPERTIES
    
    @State private var showDiscloureGroup = false
    @State private var showDetails = false
    
    // MARK: - BODY
    
    var body: some View {
        VStack{
            Toggle("Show Disclosure Group", isOn: $showDiscloureGroup)
            Toggle("Show Details", isOn: $showDetails)
            
            MyDiscloureGroup(showing: $showDiscloureGroup, revealDetails: $showDetails)
        }//: VSTACK
        .padding()
    }
}

// MARK: - PREVIEW
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

MyDiscloureGroupView

import SwiftUI

struct MyDiscloureGroupView: View {
    
    @Binding var showing : Bool
    @Binding var revealDetails : Bool

    
    var body: some View {
        if showing {
            VStack {
                DisclosureGroup("Monday", isExpanded: $revealDetails){
                        Text("7PM - 10PM").frame(height: 100)
                    }
                .frame(width: 150)
                    .buttonStyle(PlainButtonStyle()).accentColor(.black)
            }
        }
    }
}

struct MyDiscloureGroup_Previews: PreviewProvider {
    static var previews: some View {
        MyDiscloureGroupView(showing: .constant(true), revealDetails: .constant(true))
    }
}