SwiftUI dismiss modal view presentation

SwiftUIDismissModalView.swift

// Works on Xcode 11 GM as of 09/12/19

// Presenting view
// make sure the .sheet modifier is tied to the root View  
import SwiftUI

struct ContentView: View {
  
  @State private var showingModalView = false
  
  var body: some View {
    NavigationView {
      Button(action: {
        self.showingModalView = true
      }) {
        Text("Present Notes View")
      }
      .navigationBarTitle("Notes")
      .sheet(isPresented: $showingModalView, content: {
        AddNotesView()
      })
    }
  }
}

struct ContentView_previews: PreviewProvider {
  static var previews: some View {
    ContentView()
  }
}





// Presented view 
import SwiftUI

struct AddNotesView: View {
  
  @Environment(\.presentationMode) var presentationMode
  
  @State private var note: String = ""
  
  var body: some View {
    VStack(spacing: 20) {
      Spacer()
      TextField("enter your note", text: $note)
        .textFieldStyle(RoundedBorderTextFieldStyle.init())
      Button(action: {
        self.presentationMode.wrappedValue.dismiss()
      }) {
        Text("Save note")
      }
      Spacer()
    }
  }
}

struct AddNotesView_Previews: PreviewProvider {
  static var previews: some View {
    AddNotesView()
  }
}