将屏幕外的SwiftUI视图居中

我正在尝试创建一个水平居中圆的屏幕，该圆大于实际屏幕的宽度。不幸的是，我不知道如何将它水平居中并将其固定在顶部。有没有一种简单的方法可以使用 SwiftUI 实现这样的结果？

struct DemoView: View {
    private let circleBackgroundPercentage: CGFloat = 1.3
    
    var body: some View {
        ZStack {
            GeometryReader { geometry in
                VStack(alignment: .center) {
                    Circle()
                        .fill(Color.yellow)
                        .frame(width: geometry.size.width * circleBackgroundPercentage, height: geometry.size.height * circleBackgroundPercentage, alignment: .center)
                }
            }
            Text("Demo")
        }.edgesIgnoringSafeArea(.all)
    }
}

]

回答

var body: some View {
    ZStack {
        VStack {
            Color.yellow
                .clipShape(Circle())
            Color.clear
        }
        .scaleEffect(1.8)   // << tune factor as needed !!
        Text("Demo")
    }.edgesIgnoringSafeArea(.all)
}