BigText.swift

// WARNING: this only works in Xcode 11.4 beta 2
// .minimumScaleFactor() is broken before and after

import SwiftUI

struct BigText: View {
    private static let fontSize: CGFloat = 120
    
    @State private var margin: CGFloat = 0
    
    var body: some View {
        VStack {
            HStack(alignment: .top) {
                Color.green
                    .frame(width: 90 + self.margin)
                VStack(alignment: .leading) {
                    Text("4℃")
                        .lineLimit(1)
                        .font(.system(size: Self.fontSize, weight: .thin, design: .rounded))
                    Text("19010℃")
                        .lineLimit(1)
                        .font(.system(size: Self.fontSize, weight: .thin, design: .rounded))
                    Text("90℃")
                        .lineLimit(1)
                        .font(.system(size: Self.fontSize, weight: .thin, design: .rounded))
                }
                .minimumScaleFactor(0.3)
                Color.purple
                    .frame(width: 70 + self.margin)
            }
            Spacer()
            Slider(value: self.$margin, in: 0...130)
        }
    }
}

struct BigText_Previews: PreviewProvider {
    static var previews: some View {
        BigText()
    }
}