如何通过按钮在shinydashboard中的不同tabItem之间导航

我已经做了一个shiny 的应用程序(在shinydashboard中)，有很多菜单和子菜单项.如下所示的树形 struct

    sidebarMenu(
      menuItem("Item 1", tabName = "item1", icon = icon("dashboard")),
      menuItem("Item 2", tabName = "item2", icon = icon("th"),
               menuSubItem("Subitem1", tabName = "subitem1"),
               menuSubItem("Subitem2", tabName = "subitem2")),
      menuItem("Item 3", tabName = "item3", icon = icon("bolt"),
               menuSubItem("Subitem3", tabName = "subitem3"),
               menuSubItem("Subitem4", tabName = "subitem4")
               )
    )

在第一页中，我有四个操作按钮.我希望当任何操作按钮被点击时，相应的"子项#"页面都可以打开.我不能用shinydashboard::updateTabItems英镑做这个.请帮帮忙.示例代码/应用程序是

library(shiny)
library(shinydashboard)

ui <- dashboardPage(
  dashboardHeader(title = "Dynamic Tab Example"),
  dashboardSidebar(
    sidebarMenu(
      menuItem("Item 1", tabName = "item1", icon = icon("dashboard")),
      menuItem("Item 2", tabName = "item2", icon = icon("th"),
               menuSubItem("Subitem1", tabName = "subitem1"),
               menuSubItem("Subitem2", tabName = "subitem2")),
      menuItem("Item 3", tabName = "item3", icon = icon("bolt"),
               menuSubItem("Subitem3", tabName = "subitem3"),
               menuSubItem("Subitem4", tabName = "subitem4")
               )
    )
  ),
  dashboardBody(
    tabItems(
      tabItem(
        "item1",
        actionButton("button1", "navigate to subitem1"),
        actionButton("button2", "navigate to subitem2"),
        actionButton("button3", "navigate to subitem3"),
        actionButton("button4", "navigate to subitem4")
      ),
      tabItem("subitem1",
              box(
                title = "Item 1",
                actionButton("button1", "Button 1")
              )
      ),
      tabItem("subitem2",
              box(
                title = "Item 2 Content",
                "This is the content for Item 2."
              )
      ),
      tabItem("subitem3",
              box(
                title = "Item 3 Content",
                "This is the content for Item 3."
              )
      ),
      tabItem("subitem4",
              box(
                title = "Item 4 Content",
                "This is the content for Item 4."
              )
      )
    )
  )
)

server <- function(input, output, session) {
  

}

shinyApp(ui, server)