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我正在开发一个 Shiny 应用程序，该应用程序允许用户选择一个文件夹，shinyFiles::shinyDirChoose()然后使用visNetwork. 除非我包含图标 / addFontAwesome()，否则一切正常，在这种情况下shinyDirChoose()不显示文件夹和文件。是否有修复，或者这是一个错误？如果是后者，是哪个包，shinyFiles还是visNetwork？

这是一个MWE。在本例中，为简单起见，选择文件夹与可视化无关，但仍会重现错误。该示例基于visNetwork此处找到的示例：https ://datastorm-open.github.io/visNetwork/image_icon.html并运行shinyFiles::shinyFilesExample()

library(magrittr)

server <- function(input, output) {

  volumes <- shinyFiles::getVolumes()

  shinyFiles::shinyDirChoose(input, "directory", roots=volumes)

  output$directorypath <- shiny::renderPrint({shinyFiles::parseDirPath(volumes, input$directory)})

  output$network <- visNetwork::renderVisNetwork({

    nodes <- data.frame(id = 1:5, group = c(rep("A", 2), rep("B", 3)))
    edges <- data.frame(from = c(2,5,3,3), to = c(1,2,4,2))

    visNetwork::visNetwork(nodes, edges, width = "100%") %>% 

      visNetwork::visGroups(groupname = "A", shape = "icon", 
                icon = list(code = "f0e3", color = "darkblue")) %>% 

       visNetwork::visGroups(groupname = "B", shape = "icon",
                 icon = list(code = "f000", color = "red")) %>% 

       visNetwork::addFontAwesome()

  })
}

ui <- fluidPage(

  shinyFiles::shinyDirButton("directory", "Folder select", "Please select a folder"),

  shiny::verbatimTextOutput("directorypath"), 

  visNetwork::visNetworkOutput("network")
)

shiny::shinyApp(ui = ui, server = server)

如果图标块被删除，即visGroups行更改为：

  visNetwork::visGroups(groupname = "A", color = "darkblue") %>% 

  visNetwork::visGroups(groupname = "B", color = "red")

它工作正常。（visNetwork::addFontAwesome()线路不是问题。）

我很困惑。

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