html - 使用 UIViewPrintFormatter 从 Html 创建的 Pdf 不显示本地镜像
<p><p>我正在从带有图像的 html 文件创建 pdf。我尝试通过将 html 加载到 WebView 中从 Html 和 UIWebView 创建。以下是用于这两种方法的方法</p>
<p>1.来自html</p>
<pre><code> func exportHTMLContentToPDF(HTMLContent: String) {
let printPageRenderer = CustomPrintPageRenderer()
let printFormatter = UIMarkupTextPrintFormatter(markupText: HTMLContent)
printPageRenderer.addPrintFormatter(printFormatter, startingAtPageAtIndex: 0)
let pdfData = drawPDFUsingPrintPageRenderer(printPageRenderer)
pdfData.writeToFile(pdfPath(), atomically: true)
}
</code></pre>
<p>2.从UiWebView通过加载Html</p>
<pre><code>func createPdfFromViewFormatter(viewFormatter:UIViewPrintFormatter) {
let printPageRenderer = CustomPrintPageRenderer()
printPageRenderer.addPrintFormatter(viewFormatter, startingAtPageAtIndex: 0)
let pdfData = drawPDFUsingPrintPageRenderer(printPageRenderer)
pdfData.writeToFile(pdfPath(), atomically: true)
}
</code></pre>
<p>pdf创建方法`</p>
<pre><code> private func drawPDFUsingPrintPageRenderer(printPageRenderer: UIPrintPageRenderer) -> NSData! {
let data = NSMutableData()
UIGraphicsBeginPDFContextToData(data, CGRect(x: 0.0, y: 0.0, width: printPageRenderer.printableRect.width, height: printPageRenderer.printableRect.height), nil)
printPageRenderer.prepareForDrawingPages(NSRange(location: 0, length:printPageRenderer.numberOfPages() ))
for i in 0..<printPageRenderer.numberOfPages() {
UIGraphicsBeginPDFPage()
printPageRenderer.drawPageAtIndex(i, inRect: UIGraphicsGetPDFContextBounds())
}
UIGraphicsEndPDFContext()
return data
}
</code></pre>
<p>问题是 html 中的图像未显示在创建的 pdf 中。但是在 UIWebView 中加载时显示。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>我遇到了同样的问题:
<a href="https://stackoverflow.com/questions/40022032/ios-swift-sharing-pdf-documents-with-images" rel="noreferrer noopener nofollow">IOS Swift sharing PDF documents with images</a>
我相信这是一个错误。到目前为止，我发现的唯一解决方案是创建一个我隐藏的虚拟 UIWebView。我在 UIWebView 中加载 HTML，然后创建 PDF。这是我的代码:</p>
<pre><code> override func viewDidLoad() {
super.viewDidLoad()
hiddenWebView.loadHTMLString(htmlText, baseURL: nil)
hiddenWebView.isHidden = true
}
override func viewDidAppear(_ animated: Bool) {
pdfDocument = getPdf()
let tmpDirectoryURL = URL(fileURLWithPath: NSTemporaryDirectory())
let fileURL = tmpDirectoryURL.appendingPathComponent("document.pdf")
pdfDocument.write(to: fileURL, atomically: false)
documentWebView.loadRequest(URLRequest(url: fileURL))
}
</code></pre>
<p>希望对你有帮助。</p></p>
<p style="font-size: 20px;">关于html - 使用 UIViewPrintFormatter 从 Html 创建的 Pdf 不显示本地镜像，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/39764019/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/39764019/
</a>
</p>
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