我正在用R抓取Google Play应用的评论的网页，但得不到票数。我指示代码： 喜欢％html_nodes（“。xjKiLb”）％>％html_attr（“ aria-label”） ，但我没有任何价值。怎么办？

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完整代码

#Loading the rvest package
library(rvest)
library(magrittr) # for the '%>%' pipe symbols
library(RSelenium) # to get the loaded html of 


url <- 'https://play.google.com/store/apps/details?id=com.gospace.parenteral&showAllReviews=true'

# starting local RSelenium (this is the only way to start RSelenium that is working for me atm)
selCommand <- wdman::selenium(jvmargs = c("-Dwebdriver.chrome.verboseLogging=true"),retcommand = TRUE)
shell(selCommand,wait = FALSE,minimized = TRUE)
remDr <- remoteDriver(port = 4567L,browserName = "firefox")
remDr$open()

# go to website
remDr$navigate(url)

# get page source and save it as an html object with rvest
html_obj <- remDr$getPageSource(header = TRUE)[[1]] %>% read_html()

likes <- html_obj %>% html_nodes(".xjKiLb") %>% html_attr("aria-label")

什么让我回来

  

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我想退回的物品

  

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