下面的代码允许用户保存，加载和删除矩阵中的输入。这是用于保存场景。为了简洁起见，我想移动“加载”（将保存的场景数据加载到矩阵中）函数到模态对话框中。我有一个占位符用于触发模态对话框，现在称为modify。如何将“加载”函数移动到模态对话框中？一旦我明白了如何做到这一点，我将做同样的保存和删除功能。
下面的例子说明了我正在尝试做的事情：

的数据
代码：

library(shiny)
library(shinyjs)
library(shinyMatrix)

ui <- fluidPage(
  useShinyjs(),
  h5(strong("Matrix inputs:")),
  matrixInput(
    "base_input", 
    value = matrix(rep(1,2), 2, 1, dimnames = list(c("A","B"),NULL)),
    rows = list(extend = FALSE,  names = TRUE),
    cols = list(extend = FALSE, names = FALSE, editableNames = FALSE),
    class = "numeric"
  ),
  
  h5(strong("Manipulate matrix inputs and output as dataframe:")),
  tableOutput("result_table"),
  
  h5(strong("Save, Load, and Delete User Inputs:")),
  textInput("save_name", "Save As:"),
  actionButton("save_btn", "Save"),
  br(),br(),
  actionButton('modify','Load saved inputs'),
  
  selectInput("load_input", "Load Saved Inputs:", ""),
  actionButton("load_btn", "Load"),
  
  selectInput("delete_input", "Delete Saved Inputs:", ""),
  actionButton("delete_btn", "Delete"),
  
  hidden(downloadButton("save_file", "Download Saved Input")),
  hidden(downloadButton("load_file", "Download Loaded Input"))
)

server <- function(input, output, session)({
  observeEvent(input$save_btn, {
    name <- input$save_name
    values <- input$base_input
    saveRDS(values, paste0(name, ".rds"))
  })
  
  observe({
    saved_files <- list.files(pattern = "\\.rds$")
    updateSelectInput(session, "load_input", choices = saved_files)
    updateSelectInput(session, "delete_input", choices = saved_files)
  })
  
  observeEvent(input$modify,{
    showModal(modalDialog(
      h5("Would like to move the load section here...")
    )) 
  }) 
  
  observeEvent(input$load_btn, {
    file <- input$load_input
    if (file.exists(file)) {
      loaded_values <- readRDS(file)
      updateMatrixInput(session, "base_input", value = loaded_values)
    }
  })
  
  observeEvent(input$delete_btn, {
    file <- input$delete_input
    if (file.exists(file)) {
      unlink(file)
    }
  })
  
  matrix_data <- reactive({
    matrix_df <- as.data.frame(
      matrix(
        input$base_input * 4, 2, 1, dimnames = list(c("A","B"), NULL)
      )
    )
    colnames(matrix_df) <- "Matrix x 4"
    matrix_df
  })
  
  output$result_table <- renderTable({
    matrix_data()
  }, rownames = TRUE, colnames = TRUE)
  
  output$save_file <- downloadHandler(
    filename = function() {
      paste0(input$save_name, ".rds")
    },
    content = function(file) {
      saveRDS(input$base_input, file)
    }
  )
  
  output$load_file <- downloadHandler(
    filename = function() {
      input$load_input
    },
    content = function(file) {
      file.copy(input$load_input, file)
    }
  )
})

shinyApp(ui, server)

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