How to scale text to fit parent view with SwiftUI? : <p>I'd like to create a text view inside a circle view. The font size should be automatically set to fit the size of the circle. How can this be done in SwiftUI? I tried scaledToFill and scaledToFit modifiers, but they have no effect on the Text view:</p>

<pre><code>struct ContentView : View {
    var body: some View {
        ZStack {
            Circle().strokeBorder(Color.red, lineWidth: 30)
            Text("Text").scaledToFill()
        }
    }
}
</code></pre>
