如何在SwiftUI上的最后一次更新位置开始手势？

import SwiftUI

struct ContentView: View {
    @State private var gestureLocation: CGPoint = .zero

    var body: some View {
        Rectangle()
            .fill(Color.blue)
            .frame(width: 200, height: 200)
            .gesture(
                DragGesture()
                    .onChanged { value in
                        self.gestureLocation = value.location
                    }
                    .onEnded { value in
                        // 手势结束时的处理逻辑
                    }
            )
            .onAppear {
                // 在视图显示出来时，打印最后一次更新位置
                print("Last Update Location: \(self.gestureLocation)")
            }
    }
}

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