R Shiny应用本地图片无法显示问题求助

Hey there! I see the issue with your image not displaying properly—let's get this sorted out quickly.

The Root Problem #

Shiny has a specific way of handling static assets like images: it looks for them in a www folder located in the same directory as your Shiny app script. Using an absolute local path (like C:/Users/asus/Desktop/App-1/rstudio.png) doesn't work because Shiny restricts access to files outside its expected resource structure, and this will also break if you ever deploy the app later.

Step-by-Step Fix #

1. Create a www folder: In the same folder where your Shiny app script is saved (looks like C:/Users/asus/Desktop/App-1/), make a new folder named www (all lowercase, no spaces).
2. Move your image: Copy rstudio.png into this new www folder.
3. Update your img code: Change the src parameter to just the filename of the image, since Shiny will automatically look in the www folder:

   img(src="rstudio.png", height=70, width=200)
   

Modified Full Code #

Here's your updated app code with the fix applied (I also fixed a small typo in your install command!):

ui <- fluidPage(
  titlePanel("My Shiny App"),
  sidebarLayout(
    sidebarPanel(
      h4("Installation"),
      p("Shiny is available on CRAN, so you can install it on the usual way from your R console:"),
      div("install.packages('shiny')", style="color:red"),
      img(src="rstudio.png", height=70, width=200)
    ),
    mainPanel()
  )
)
#define server logic
server <- function(input, output) {
}
# Run the app ----
shinyApp(ui = ui, server = server)

Alternative (If You Must Use Absolute Paths) #

If for some reason you need to keep the image outside the www folder, you can use renderImage in the server to serve it:

ui <- fluidPage(
  titlePanel("My Shiny App"),
  sidebarLayout(
    sidebarPanel(
      h4("Installation"),
      p("Shiny is available on CRAN, so you can install it on the usual way from your R console:"),
      div("install.packages('shiny')", style="color:red"),
      uiOutput("my_image")
    ),
    mainPanel()
  )
)

server <- function(input, output) {
  output$my_image <- renderUI({
    img(src = normalizePath("C:/Users/asus/Desktop/App-1/rstudio.png"), 
        height=70, width=200)
  })
}

shinyApp(ui = ui, server = server)

But the www folder method is always the cleaner, more standard approach for Shiny apps.

内容的提问来源于stack exchange，提问作者user19562955