Extend SwiftUI Keyboard with Custom Button : <p>I'm trying to find a way to add a key or button to the SwiftUI numberPad. The only
references I have found say it is not possible. In the Swift world I added a toolbar
with a button to dismiss the keyboard or perform some other function.</p>

<p>I would even build a ZStack view with the button on top but I can't find a way to add the
numberPad to my own view.</p>

<p>All I'm really trying to do in this case is dismiss the numberPad when the data is
entered. I first attempted to modify the SceneDelegate to dismiss on taps, but that
only works if I tap in another text or textfield view not in open space on the view.</p>

<pre><code>window.rootViewController = UIHostingController(rootView: contentView.onTapGesture {
    window.endEditing(true)
})
</code></pre>

<p>Ideally, I'd add a Done key to the lower left space. Second best add a toolbar if
it can be done in SwiftUI.</p>

<p><a href="https://i.stack.imgur.com/tDT8M.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tDT8M.png" alt="enter image description here"></a></p>

<p>Any guidance would be appreciated.</p>

<p>Xcode Version 11.2.1 (11B500)</p>
