Adding a "Hamburger" Menu to IOS application - swift

Question

I am trying to create a hamburger menu that when you click the "hamburger" (three horizontal lines) button, the menu will slide out. I am following the tutorial found here, but the only thing that isn't working is the lines for the Hamburger image is not showing up on my application. Everything else works, but for some reason this is the one thing that is not working.
Here is my code for the ContentView, where it hosts the problem code
struct ContentView: View {
#State var showMenu = false
var body: some View {
let drag = DragGesture()
.onEnded {
if $0.translation.width < -100 {
withAnimation {
self.showMenu = false
}
}
}
return NavigationView {
GeometryReader { geometry in
ZStack(alignment: .leading) {
MainView(showMenu: self.$showMenu)
.frame(width: geometry.size.width, height: geometry.size.height)
.offset(x: self.showMenu ? geometry.size.width/2 : 0)
.disabled(self.showMenu ? true : false)
if self.showMenu {
MenuView()
.frame(width: geometry.size.width/2)
.transition(.move(edge: .leading))
}
}
.gesture(drag)
}
.navigationBarTitle("Side Menu", displayMode: .inline) // this works
//somewhere below here is the problem
.navigationBarItems(leading: (
Button(action: {
withAnimation {
self.showMenu.toggle()
}
}) {
Image(systemName: "three_horizontal_lines")
.imageScale(.large)
}
))
}
}
}
Here is the MainView:
struct MainView: View{
#Binding var showMenu: Bool
var body: some View{
Button(action: {
withAnimation{
self.showMenu = true
}
}){
Text("Show Menu")
}
}
}
Lastly, this is the MenuView:
struct MenuView: View{
var body: some View{
VStack(alignment: .leading){
HStack{
Image(systemName: "person")
.foregroundColor(.gray)
.imageScale(.large)
Text("Profile")
.foregroundColor(.gray)
.font(.headline)
}
.padding(.top, 100)
HStack{
Image(systemName: "envelope")
.foregroundColor(.gray)
.imageScale(.large)
Text("Messages")
.foregroundColor(.gray)
.font(.headline)
}
.padding(.top, 30)
HStack{
Image(systemName: "gear")
.foregroundColor(.gray)
.imageScale(.large)
Text("Settings")
.foregroundColor(.gray)
.font(.headline)
}
.padding(.top, 30)
Spacer()
}
.padding()
.frame(maxWidth: .infinity, alignment: .leading)
.background(Color(red: 32/255, green: 32/255, blue: 32/255))
.edgesIgnoringSafeArea(/*#START_MENU_TOKEN#*/.all/*#END_MENU_TOKEN#*/)
}
}
I have checked for any misspellings and even copied and pasted the code from the original tutorial, but it seems nothing allows me to see the burger image like is shown on the tutorial. Any thoughts on what else I could try?