SwiftUI 滚动到顶部 HStack Foreach

如何解决SwiftUI 滚动到顶部 HStack Foreach

我在尝试滚动到 ScrollView 顶部时遇到问题。我在 SCrollView 中使用了 ScrollViewReader，并使用 .onReceive() 我的 lazyvstack 订阅了视图模型中的 @PUlished scrollToTop 属性。我看到它正确接收了通知，但我的 Scroll 没有移到顶部。这是我的代码：

struct NewsList: View {
    @Observedobject var viewmodel: NewsListviewmodel
    @State var isDetailsViewShown = false
    var body: some View {
        NavigationView {
            GeometryReader { geometry in
                vstack {
                    if !viewmodel.isSearching {
                        TitleView(title: "News")
                            .frame(height: geometry.size.height / 11)
                            .frame(minWidth: 0,maxWidth: .infinity,minHeight: 0)
                            .padding(.horizontal,13)
                            .padding(.bottom,0)
                    }
                    SearchView(searchText: $viewmodel.searchText,isSearching: $viewmodel.isSearching)
                        .padding([.trailing,.leading,.bottom],13)
                    if !viewmodel.isSearching {
                        TabsView(selected: $viewmodel.selectedTab)
                            .padding(.horizontal,13)
                    }
                    ScrollView {

                    ScrollViewReader { reader in
                        
                            Lazyvstack(spacing: 15) {
                                ForEach(articles.indices,id: \.self) { index in
                                    NavigationLink(destination: DetailsNewsView(article: articles[index])) {
                                        NewsCell(article: articles[index])
                                            .onAppear {
                                                checkActionForLastCell(index: index)
                                            }
                                    }.buttonStyle(FlatLinkStyle())
                                    
                                }
                            }.animation(nil)
                            .padding(.horizontal,8)
                            .onReceive(viewmodel.$scrollTop) { (scrollToTop) in
                                guard let first = articles.first,scrollToTop else { return}
                                reader.scrollTo(first,anchor: .top)
                                print(scrollToTop)
                            }
                        }
                    }
                }
                .background(Color.background.edgesIgnoringSafeArea(.all))
                .navigationBarHidden(true)
                .onAppear {
                    //viewmodel.getNews()
                }
            }
        }
    }
    
    var articles: [Article] {
        guard viewmodel.searchedArticles.isEmpty || viewmodel.searchText.count < 3 else { return viewmodel.searchedArticles}
        return viewmodel.tabsArticles[viewmodel.selectedTab] ?? []
    }
    
    func checkActionForLastCell(index: Int) {
        if index == articles.count - 1 {
            viewmodel.getNextPageNews(isPaging: true)
        }
    }
}

在我的 viewmodel 中，我只是使用一个计时器来查看它是否收到通知

class NewsListviewmodel: ObservableObject {
   /..../
    @Published var scrollTop = false

    
    init() {
        dispatchQueue.main.asyncAfter(deadline: .Now() + 5) {
            self.scrollTop = true
        }
    }
}

我打印了通知并且 reader.scrollTo(first,anchor: .top) 被执行...但我的表格没有滚动到顶部。