swiftui navigationview 弹出到 root 并以编程方式加载新视图

问题描述

在我的应用程序中，我想以编程方式从选项卡页面打开聊天页面。我正在尝试更改选择并安装它。如果聊天行出现在屏幕上，则它可以正常工作并加载。 但是如果聊天行在较低的行（例如，如果它在第 100 行），则不会加载。它需要向下滚动并出现加载。我们如何解决这个问题，如何加载聊天页面？

struct TabPage: View {
    @State private var selectedItemIndex : Int = 2
    @State var conversNavLink: String? = nil
    @State var isActive1: Bool = false

    var body: some View {
        ZStack{
            NavigationView{
                vstack(spacing:0) {
                    switch selectedItemIndex {
                    case 0: Shop()
                    case 1: ConversationsView(conversNavLink: $conversNavLink)
                    case 2: GameHome(isActiveNavLink: $isActive1)
                    default: Shop()
                    }
                    
                    Tabbar(selectedItemIndex: $selectedItemIndex)
                }
            }
        }
        .navigationBarHidden(true)
        .navigationViewStyle(StackNavigationViewStyle())
        .onReceive(NotificationCenter.default.publisher(for: NSNotification.loadChatWithID)){ obj in
            if let userInfo = obj.userInfo,let id = userInfo["id"] as? String {
                isActive1 = false
                selectedItemIndex = 1
                conversNavLink = id
            }
        }
    }
}




struct ConversationsView: View {
    @EnvironmentObject var manager  : ConversationsManager
    @EnvironmentObject var um : UserManager
    
    @Binding var conversNavLink: String?
    
    var body: some View {
        ZStack{
            vstack(spacing:0){
                navBar()
                ScrollView {
                    Lazyvstack(spacing:0) {
                        ForEach(manager.convers.sorted(by: { $0.messages.last?.sentDate ?? Date() > $1.messages.last?.sentDate ?? Date()}),id: \.conversID) { convers in
                            NavigationLink(destination:ChatPage(privateSetting:(um.getUser(curUserID).privateSetting!)).environmentObject(convers),tag: convers.conversID,selection: $conversNavLink) {
                                ConversationCell(isSelected: self.selections.contains{ $0.conversID == convers.conversID },isEditing: isEditing){
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}



struct GameHome: View {
    @Binding var isActive1: Bool

    var body: some View {
        ZStack{
            NavigationLink(destination: Sub1($isActive1),isActive: $isActive1) {
                Text("load sub 1")
            }
        }
    }
}

struct Sub1: View {
    @Binding var isActive1: Bool
    var body: some View {
        ZStack{
            NavigationLink(destination: Sub2($isActive1),isActive: $isActive1) {
                Text("load sub 2")
            }
        }
    }
}


struct Sub2: View {
    @Binding var isActive1: Bool
    var body: some View {
        ZStack{
            BUtton({
                NotificationCenter.default.post(name: NSNotification.loadChatWithID,object: nil,userInfo: ["id": chatID])
            }){
                Text("load chat with id")
            }
        }
    }
}

解决方法

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