SwiftUI在使用Swift结构和id时让ScrollViewReader滚动

import SwiftUI

struct ContentView: View {
    @State private var scrollToViewID: Int? = nil
    
    var body: some View {
        VStack {
            Button("Scroll to View 3") {
                scrollToViewID = 3
            }
            
            ScrollViewReader { scrollViewProxy in
                ScrollView {
                    VStack(spacing: 20) {
                        ForEach(1...10, id: \.self) { i in
                            Text("View \(i)")
                                .frame(width: 200, height: 200)
                                .background(Color.gray)
                                .id(i)
                        }
                    }
                    .onChange(of: scrollToViewID) { id in
                        withAnimation {
                            scrollViewProxy.scrollTo(id, anchor: .top)
                        }
                    }
                }
            }
        }
    }
}

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