有効・無効の切り替え

FirstView.swift

struct FirstView: View {
    
    @State var isDisable: Bool = false
    
    var body: some View {
        NavigationView {
            VStack {
                Toggle(isOn: $isDisable) {
                    Text("リンクを無効にする")
                }.frame(width: 220)
                
                NavigationLink("画面遷移", destination: SecondView()).disabled(isDisable)
            }
        }
    }
}