ContentView.swift

struct ContentView: View {

  @State private var showAlert: Bool = false

  var body: some View {
    Button("Show alert") {
      showAlert = true
    }.alert(
      "Hello!",
      isPresented: $showAlert,
      actions: {
        Button("Delete data", role: .destructive) {}
        Button("Cancel", role: .cancel) {}
      },
      message: {
        Text("This is a message!")
      }
    )
  }
}