SwiftUI:在单个视图和HStack视图之间设置动画

import SwiftUI

struct ContentView: View {
    @State private var isAnimating = false
    
    var body: some View {
        VStack {
            Button("Toggle Animation") {
                withAnimation {
                    self.isAnimating.toggle()
                }
            }
            
            if isAnimating {
                Rectangle()
                    .fill(Color.red)
                    .frame(width: 100, height: 100)
                    .transition(.scale)
            }
            
            HStack {
                Rectangle()
                    .fill(Color.blue)
                    .frame(width: 100, height: 100)
                    .animation(.easeInOut)
                
                Rectangle()
                    .fill(Color.green)
                    .frame(width: 100, height: 100)
                    .animation(.easeInOut)
            }
        }
    }
}

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