Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms.... pdf ' ) page_count = pdf . getPages (). size...size () puts "页数:" + page_count . to_s 下载运行代码 从以下任一社交编程网站下载 获取页数...