有时没有办法估计执行时间。 对于这些情况,使用径向进度指示器或移动阴影条会很有用。
https://groups.google.com/d/msg/shiny-discuss/a3TcQ2C_hS0/3H4zocpRD0AJ
另一种可能性是简单地使条纹更明显并将进度值设置为 1:
server <- function(input, output) {
output$plot <- renderPlot({
input$goPlot # Re-run when button is clicked
dat <- data.frame(x = rnorm(10), y = rnorm(10))
withProgress(message = 'Making plot', value = 1, {
Sys.sleep(20)
})
plot(dat$x, dat$y)
})
}
ui <- shinyUI(basicPage(
tags$head(tags$style(HTML("
.progress-striped .bar {
background-color: #149bdf;
background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(0.25, rgba(255, 255, 255, 0.6)), color-stop(0.25, transparent), color-stop(0.5, transparent), color-stop(0.5, rgba(255, 255, 255, 0.6)), color-stop(0.75, rgba(255, 255, 255, 0.6)), color-stop(0.75, transparent), to(transparent));
background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, 0.6) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0.6) 75%, transparent 75%, transparent);
background-image: -moz-linear-gradient(45deg, rgba(255, 255, 255, 0.6) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0.6) 75%, transparent 75%, transparent);
background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, 0.6) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0.6) 75%, transparent 75%, transparent);
background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.6) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0.6) 75%, transparent 75%, transparent);
-webkit-background-size: 40px 40px;
-moz-background-size: 40px 40px;
-o-background-size: 40px 40px;
background-size: 40px 40px;
}
"))),
plotOutput('plot', width = "300px", height = "300px"),
actionButton('goPlot', 'Go plot')
))
shinyApp(ui = ui, server = server)
我已经尝试接受上面的建议……但它似乎没有用……
请参阅下面的我的尝试,任何帮助将不胜感激。
http://stackoverflow.com/questions/38339593/shiny-loading-bar-for-htmlwidgets
是否也可以使用这样的东西?...
我认为你可以使用https://getbootstrap.com/docs/3.4/components/#progress -animated。
@jcheng5建议通过设置value = NA
激活“不确定模式”。 但是鉴于这被称为“动画”,也许添加animated
参数会更灵活,因此您可以执行withProgress(..., value = 1, animate = TRUE)
最有用的评论
另一种可能性是简单地使条纹更明显并将进度值设置为 1: