SwiftUI: minXxx / maxXxx / fixedSize

ContentView.swift

struct ContentView: View {
    var body: some View {
        VStack(spacing: 50) {

            // minWidth / minHeight
            Color.blue.opacity(0.3)
                .frame(minWidth: 100, minHeight: 200)
                .frame(width: 150, height: 150)
                .border(.black)
                .overlay {
                    Text("min")
                }

            // maxWidth / maxHeight
            Color.red.opacity(0.3)
                .frame(maxWidth: 100, maxHeight: 200)
                .frame(width: 150, height: 150)
                .border(.black)
                .overlay {
                    Text("max")
                }

            // fixedSize
            ZStack {
                Color.clear
                    .frame(width: 10, height: 10)
                    .border(.black)

                Color.green.opacity(0.3)
                    .fixedSize()
                    .overlay(alignment: .bottom) {
                        Text("Color has not ideal size.\nRender as system default size. (10x10)")
                            .fixedSize()
                            .alignmentGuide(VerticalAlignment.bottom) { _ in -10 }
                    }
            }

        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}