如何在SwiftUI中制作覆盖动画

struct ContentView: View {
    @State private var isCovered = false
    
    var body: some View {
        VStack {
            Button(action: {
                withAnimation {
                    self.isCovered.toggle()
                }
            }) {
                Text("Toggle Cover")
                    .font(.largeTitle)
            }
            
            ZStack {
                Rectangle()
                    .foregroundColor(.red)
                    .frame(width: 200, height: 200)
                    .opacity(isCovered ? 0 : 1)
                
                Rectangle()
                    .foregroundColor(.blue)
                    .frame(width: 200, height: 200)
                    .opacity(isCovered ? 1 : 0)
            }
            .animation(.easeInOut(duration: 0.5))
        }
    }
}