Arrange custom views in SwiftUI without space or overlap - swift

Question

I'm trying to build a UI (SwiftUI / iOS) out of a number of custom views.
All those custom views have a defined aspect ratio or ratio for their frame.
Here's a simplified version of such a custom view:
struct TestView: View {
var body: some View {
GeometryReader { geometry in
RoundedRectangle(cornerRadius: 20)
.foregroundColor(Color.blue)
.frame(height: geometry.size.width / 3)
}
}
}
My ContentView currently looks like that:
struct TestContentView: View {
var body: some View {
GeometryReader {geomerty in
VStack {
TestView()
TestView()
}
}
}
}
I would like to have the two rectangles to be positioned right below each other (at the top of the screen). So without any space between them. So a bit like an old-fashioned UITableView with only to rows.
But whatever I try, I only get one of two results:
They are equally spread out over the screen (vertically)
They overlap (= the view on the top only gets a vertical size of 20
The only solution I've found so far is to define the frame size of the sub-views also in the TestContentView(). But that seems to be quite un-SwiftUI.
Thanks!

Answer 1

Remove the GeometryReader from your content view, since it isn't doing anything
You said that your TestView has a defined aspect ratio, but, in fact, it doesn't -- it just has a defined width. If you do define an aspect ratio, it starts working as expected:
struct TestView: View {
var body: some View {
RoundedRectangle(cornerRadius: 20)
.foregroundColor(Color.blue)
.aspectRatio(3, contentMode: .fit)
}
}
struct TestContentView: View {
var body: some View {
VStack(spacing: 0) {
TestView()
TestView()
Spacer()
}
}
}