我正在尝试运行 cocoapod 依赖项ios-PDF-Reader，当我通过“文件”应用程序在手机上选择 pdf 时，出现以下错误：
[DocumentManager] Failed to associate thumbnails for picked URL file:///private/var/mobile/Containers/Data/Application/../../Welcome.pdf
with the Inbox copy file:///private/var/mobile/Containers/Data/Application/../../tmp/com../Welcome.pdf:
Error Domain=QLThumbnailErrorDomain Code=102 "(null)"
UserInfo={NSUnderlyingError=0x28226cf90 {Error Domain=GSLibraryErrorDomain Code=3 "Generation not found"
UserInfo={NSDescription=Generation not found}}}
以前有人遇到过无法关联缩略图错误吗？有没有简单的解决方法？这是它中断的代码：
extension TestPdfEpubViewController: UIDocumentPickerDelegate {
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
guard let selectedFileURL = urls.first else { return }
//create pdf first
let documentFileURL = Bundle.main.url(forResource: selectedFileURL.absoluteString, withExtension: "pdf")!
let document = PDFDocument(url: documentFileURL)!
//then display the pdf
let readerController = PDFViewController.createNew(with: …我很难搞清楚为什么我的标签ID无法正常工作或运行应该如此.在单击时,它应该用不同的东西替换文本(即正在构建的页面).
这是我到目前为止...
HTML
<!doctype html>
<html>
<head>
<title>Main Page</title> <!--main page title -->
<script type="text/javascript" scr="home_page.js"></script>
<link rel="stylesheet" type="text/css" href="home_page.css"/>
</head>
<body>
<h1> Express Shop </h1>
<div class="content">
<div class="navbar">
<ul>
<li><a href="#" title="Home" class="active">Home</a></li>
<li><a href="#" title="Inventory">Inventory</a></li>
<li><a href="#" title="Directions">Directions</a></li>
<li><a href="#" title="Contact Us">Contact Us</a></li>
</ul>
</div>
<div id="tab1" class="tab active">
<h3>Welcome to Express Shop!</h3>
<p>Your one stop shop for repairs! We work with various laptops, PCs, iPhones, iPads, tablets, smart phones and more!</p>
<p> We are also an …