iOS 客户端从服务器下载word文档，缓存并浏览(swift)

filePath.contains(contractNo){ currentIndex = index } } let qlVc = QLPreviewController.init pushViewController(qlVc, animated: true) } func numberOfPreviewItems(in controller: QLPreviewController 0 } func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem