如何在SwiftUI中制作覆盖动画

import SwiftUI

struct ContentView: View {
    @State private var isAnimating = false

    var body: some View {
        ZStack {
            // 底层视图
            Rectangle()
                .fill(Color.blue)
                .frame(width: 300, height: 300)
            
            // 覆盖视图
            Rectangle()
                .fill(Color.red)
                .frame(width: 300, height: 300)
                .offset(x: 0, y: isAnimating ? -300 : 0) // 根据状态调整位置
                .animation(Animation.easeInOut(duration: 1.0).repeatForever(autoreverses: true), value: isAnimating) // 添加动画
        }
        .onAppear {
            self.isAnimating = true // 视图出现时开始动画
        }
    }
}

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