SwiftUI Dismiss Multiple Modal Sheets

You can pass showModal as a binding into the following screens and instead of using presentationValue set showModal to false.

Solution 1 - Custom EnvironmentKey

A possible solution is to use a custom EnvironmentKey injected to every environment:

struct PresentationKey: EnvironmentKey {
    static let defaultValue: [Binding<Bool>] = []
}

extension EnvironmentValues {
    var presentations: [Binding<Bool>] {
        get { return self[PresentationKey] }
        set { self[PresentationKey] = newValue }
    }
}

---

Demo:

struct ContentView: View {
    @Environment(\.presentations) private var presentations
    @State private var showSheet = false

    var body: some View {
        Button("Show sheet") {
            showSheet = true
        }
        .sheet(isPresented: $showSheet) {
            SheetView()
                .environment(\.presentations, presentations + [$showSheet])
        }
    }
}

struct SheetView: View {
    @Environment(\.presentations) private var presentations
    @State private var showSheet = false

    var body: some View {
        Button("Show another sheet") {
            showSheet = true
        }
        .sheet(isPresented: $showSheet) {
            SheetNavigationView()
                .environment(\.presentations, presentations + [$showSheet])
        }
    }
}

struct SheetNavigationView: View {
    var body: some View {
        NavigationView {
            NavigationLink("Link", destination: SheetNavigationDetailView())
        }
    }
}

struct SheetNavigationDetailView: View {
    @Environment(\.presentations) private var presentations

    var body: some View {
        Button("Pop to root") {
            presentations.forEach {
                $0.wrappedValue = false
            }
        }
    }
}

---

Solution 2 - Dismiss UIKit rootViewController

struct SheetNavigationDetailView: View {

    var body: some View {
        Button("Pop to root") {
            UIApplication.shared.windows.first?.rootViewController?.dismiss(animated: true)
        }
    }
}