import SwiftUI

struct FullScreenCoverDemo: View {
  @State private var show = false
  var body: some View {
    Button("Present Full Screen") { show = true }
      .fullScreenCover(isPresented: $show) {
        CoverView(onClose: { show = false })
      }
  }
}

struct CoverView: View {
  let onClose: () -> Void
  var body: some View {
    ZStack {
      Color.black.opacity(0.85).ignoresSafeArea()
      VStack(spacing: 12) {
        Text("Full Screen").foregroundStyle(.white)
        Button("Dismiss") { onClose() }.tint(.white)
      }
      .padding()
    }
  }
}

                    

import SwiftUI

struct ContentView: View {
  var body: some View { FullScreenCoverDemo() }
}

                    

import SwiftUI

@main
struct MyApp: App {
  var body: some Scene { WindowGroup { ContentView() } }
}