SwiftUIでのModalの扱い方

SwiftUIModal.swift

import SwiftUI

struct ContentView: View {
    @State var showModal = false
  
    var body: some View {
      Button(action: {
        self.showModal.toggle()
        }) {
            Text("次のViewへ")
            }
         .sheet(isPresented: self.$showModal) {
             NextView()
         }
    }
}



struct NextView: View {
  @Environment(\.presentationMode) var presentationMode
  
  var body: some View {
    NavigationView {
      Text("これはNextViewです")
      .navigationBarTitle("NextView",displayMode: .inline)
      .navigationBarItems(leading: Button("完了") {
          self.presentationMode.wrappedValue.dismiss()
      })
    }
  }
}