R Shiny - 导航到选项卡项时自动隐藏侧边栏

Question

我有一个 Shiny 应用程序 - 此处为简化示例 - 我希望在导航到选项卡项时动态隐藏侧边栏。事实上，用户将主要通过他们的手机连接到该应用程序。

在帖子Hide sidebar in default in shinydashboard的帮助下，我知道如何在您到达应用程序时默认隐藏侧边栏，但在侧边栏始终显示之后。

这是我的实际代码：

### Load librairies
library(shiny) ; library(shinydashboard) ; library(shinyjs)
library(dplyr)

### Load data
Weather <- c("cold", "rain", "snow","heat","sun")
Answer <- c("Take a coat","Take an umbrella","Take gloves","Take a swimsuit","Take solair cream")
Mydata <- data.frame( Weather, Answer, stringsAsFactors = FALSE)

remove(Weather, Answer)

### Shiny
Entete <- dashboardHeader(title = "My app")

BarreLaterale <- dashboardSidebar(
  sidebarMenu(menuItem(text = "Home", tabName = "MyHome", icon = icon("home"))),
  sidebarMenu(menuItem(text = "My search", tabName = "Search", icon = icon("search")))
  )

Corps <- dashboardBody(

  useShinyjs(),

  tabItems(

    tabItem(tabName = "MyHome",
            fluidPage("Hello, welcome to the home page")
    ),        

    tabItem(tabName = "Search",
            fluidRow(
              box(title = "Weather choice",  width = 6, solidHeader = TRUE, status = "danger",
                  selectInput(inputId = "WeatherChoice", label = NULL, choices = unique(Mydata$Weather))),
              box(title = "Answer", width = 6, solidHeader = TRUE, status = "danger",
                  textOutput("ReturnAnswer"))
            )
    )

  )  
)

Interface <- dashboardPage(Entete, BarreLaterale, Corps, skin = "red")

### Server R
Serveur <- function(input, output, session) {

  output$ReturnAnswer <- renderText({
    as.character(Mydata %>% filter(Weather == input$WeatherChoice) %>% select(Answer))
  })

  addClass(selector = "body", class = "sidebar-collapse")

}

### Application
shinyApp(Interface, Serveur)

Answer 1

我在您的sidebarmenu 中添加了一个id（注意：您只需要一个带有多个menuItems 的sidebarmenu）和一个observeEvent 来监听所选标签中的更改，使用id ：

### Load librairies
library(shiny) ; library(shinydashboard) ; library(shinyjs)
library(dplyr)

### Load data
Weather <- c("cold", "rain", "snow","heat","sun")
Answer <- c("Take a coat","Take an umbrella","Take gloves","Take a swimsuit","Take solair cream")
Mydata <- data.frame( Weather, Answer, stringsAsFactors = FALSE)

remove(Weather, Answer)

### Shiny
Entete <- dashboardHeader(title = "My app")

BarreLaterale <- dashboardSidebar(
  sidebarMenu(id="mysidebar",
                menuItem(text = "Home", tabName = "MyHome", icon = icon("home")),
              menuItem(text = "My search", tabName = "Search", icon = icon("search")))
)

Corps <- dashboardBody(

  useShinyjs(),

  tabItems(

    tabItem(tabName = "MyHome",
            fluidPage("Hello, welcome to the home page")
    ),        

    tabItem(tabName = "Search",
            fluidRow(
              box(title = "Weather choice",  width = 6, solidHeader = TRUE, status = "danger",
                  selectInput(inputId = "WeatherChoice", label = NULL, choices = unique(Mydata$Weather))),
              box(title = "Answer", width = 6, solidHeader = TRUE, status = "danger",
                  textOutput("ReturnAnswer"))
            )
    )

  )  
)

Interface <- dashboardPage(Entete, BarreLaterale, Corps, skin = "red")

### Server R
Serveur <- function(input, output, session) {

  output$ReturnAnswer <- renderText({
    as.character(Mydata %>% filter(Weather == input$WeatherChoice) %>% select(Answer))
  })

  # this line is now actually obsolete.
  addClass(selector = "body", class = "sidebar-collapse")

  observeEvent(input$mysidebar,
               {
                 # for desktop browsers
                 addClass(selector = "body", class = "sidebar-collapse")
                 # for mobile browsers
                 removeClass(selector = "body", class = "sidebar-open")
               })

### Application
shinyApp(Interface, Serveur)

现在，每当您从一个选项卡切换到另一个选项卡时，侧边栏都会再次隐藏。

希望这会有所帮助！