使用SwiftUI，如何为饼图进度条添加动画

import SwiftUI

struct ContentView: View {
    @State private var progress: CGFloat = 0.0
    
    var body: some View {
        VStack {
            Circle()
                .trim(from: 0.0, to: progress)
                .stroke(Color.blue, lineWidth: 10)
                .frame(width: 100, height: 100)
                .rotationEffect(.degrees(-90))
                .animation(.easeInOut(duration: 1.0))
                .onAppear {
                    self.progress = 0.8 // 设置进度条的值
                }
            
            Button(action: {
                self.progress = 0.2 // 点击按钮时更新进度条的值
            }) {
                Text("Update Progress")
            }
        }
    }
}

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