How do I add a toolbar to a macOS app using SwiftUI?

Question

I am trying to add a toolbar inside the title bar to a macOS app using SwiftUI, something similar to what is shown below.

I am unable to figure out a way to ac

Answer 1

Inspired by your first approach I managed to get a toolbar too. As I'm using Divider()s in it, your Paddings didn't work great for me.

This one seems to work a bit smoother with different Layout-Sizes:

 let titlebarAccessoryView = TitlebarAccessory().padding([.leading, .trailing], 10).edgesIgnoringSafeArea(.top)

    let accessoryHostingView = NSHostingView(rootView:titlebarAccessoryView)
    accessoryHostingView.frame.size.height = accessoryHostingView.fittingSize.height+16
    accessoryHostingView.frame.size.width = accessoryHostingView.fittingSize.width

Maybe there is an even smoother way to get rid of this +16 and the padding trailing and leading (there are several other options instead of fittingSize), but I couldn't find any that looks great without adding numerical values.