他のViewのイベントから画面遷移

FirstView.swift

struct FirstView: View {
    
    @State var flug: Bool = false
    
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: SecondView(), isActive: $flug) {
                    EmptyView()
                }
                
                Button("ボタン") {
                    self.flug = true
                }
            }
        }
    }
}