如何在SwiftUI中为文本创建折叠动画

import SwiftUI

struct ContentView: View {
    @State private var isExpanded = false
    
    var body: some View {
        VStack {
            Button(action: {
                withAnimation {
                    self.isExpanded.toggle()
                }
            }) {
                Text("Toggle Text")
                    .font(.headline)
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
            
            if isExpanded {
                Text("This is some long text that can be collapsed and expanded.")
                    .lineLimit(nil)
                    .animation(.easeInOut(duration: 0.3))
            }
        }
        .padding()
    }
}

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