我希望在同一个文件中使用pdfjs将tcpdf输出显示为flipbook。
方法1:只使用Turnjs (就像我们对blob映像所做的那样)-not成功的
首先,我从base64获得$pdf->Output('', 'E');。然后,我转换为blob并创建url。我创建的pdf文件包含两页。我不能在转盘里预览。之后,我用id(flipbook)将url传递给div中的div。但是,在活页簿中没有显示任何内容。
<?php
ob_start();
require_once('plugin/tcpdf/tcpdf.php');
$pdf =new TCPDF();
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
$pdf->AddPage();
$html_p1='Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops/laptops, or other type of compatible computer. Text messages may be sent over a cellular network, or may also be sent via an Internet connection.';
//echo $html;
$pdf->writeHTML($html_p1, true, 0, true, 0);
$pdf->AddPage();
$html_p2='A telephone call is a connection over a telephone network between the called party and the calling party.';
$pdf->writeHTML($html_p2, true, 0, true, 0);
$base64PdfString = $pdf->Output('', 'E');
$base64PdfArray = explode("\r\n", $base64PdfString);
$base64 = '';
for($i = 5; $i < count($base64PdfArray); $i++)
{
$base64 .= $base64PdfArray[$i];
}
?>
<!doctype html>
<!--[if lt IE 7 ]> <html lang="en" class="ie6"> <![endif]-->
<!--[if IE 7 ]> <html lang="en" class="ie7"> <![endif]-->
<!--[if IE 8 ]> <html lang="en" class="ie8"> <![endif]-->
<!--[if IE 9 ]> <html lang="en" class="ie9"> <![endif]-->
<!--[if !IE]><!--> <html lang="en"> <!--<![endif]-->
<head>
<meta name="viewport" content="width = 1050, user-scalable = no" />
<script type="text/javascript" src="plugin/turnjs4/extras/jquery.min.1.7.js"></script>
<script type="text/javascript" src="plugin/turnjs4/extras/modernizr.2.5.3.min.js"></script>
<script>
const b64toBlob = (b64Data, contentType='', sliceSize=512) =>
{
const byteCharacters = atob(b64Data);
const byteArrays = [];
for (let offset = 0; offset < byteCharacters.length; offset += sliceSize)
{
const slice = byteCharacters.slice(offset, offset + sliceSize);
const byteNumbers = new Array(slice.length);
for (let i = 0; i < slice.length; i++)
{
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
const blob = new Blob(byteArrays, {type: contentType});
return blob;
}
$( document ).ready(function() {
const contentType ='application/pdf';
const b64Data ='<?php echo $base64;?>';
const blob =b64toBlob(b64Data, contentType);
const blobUrl =URL.createObjectURL(blob);
var div_container = document.querySelector('#flipbook');
var element = document.createElement("div");
element.style.backgroundImage = "url(" + blobUrl + ")";
div_container.appendChild(element);
})
</script>
</head>
<body>
<div class="flipbook-viewport">
<div class="container">
<div class="flipbook" id="flipbook">
</div>
</div>
</div>
<script type="text/javascript">
function loadApp() {
// Create the flipbook
$('.flipbook').turn({
// Width
width:922,
// Height
height:600,
// Elevation
elevation: 50,
// Enable gradients
gradients: true,
// Auto center this flipbook
autoCenter: true
});
}
// Load the HTML4 version if there's not CSS transform
yepnope({
test : Modernizr.csstransforms,
yep: ['plugin/turnjs4/lib/turn.js'],
nope: ['plugin/turnjs4/lib/turn.html4.min.js'],
both: ['plugin/turnjs4/samples/basic/css/basic.css'],
complete: loadApp
});
</script>
</body>
</html>方法2:使用pdfjs和pdfjs库的pdfjs转换器。-成功的
我把url (php file output pdf to browser using tcpdf) as default url放在viewer.js里。此方法可以成功运行。
如果可能的话,我希望在同一个文件中将turnjs和pdfjs组合起来。在创建tcpdf输出之后,turnjs和pdfjs使用相同文件中的blob输出来显示为flipbook。
提前谢谢。
发布于 2020-01-15 04:58:22
这就是解决办法!
将$pdf->Output('', 'E')输出到变量$base64PdfString的
only base64 parts(value of index 5 onwards from the array).base64 to blob $base64PdfString数组,并在javascript中获取atob(b64Data)、new Uint8Array(byteNumbers)和new Blob(byteArrays, {type: contentType}).blobUrl中的first page.turnjs instance.page: 1,使用URL.createObjectURL(blob).first page.turnjs instance.page: 1引用加载页面。因此,在将页面添加到turnjs之前,无法定义这一点。$("#book").turn({ page: 1,autoCenter: true,});
pdf_doc.numPages.
Add all pages to turnjs在PDFJS.getDocument({ url: blobUrl }).then(function(pdf_doc){})中添加从2页到最后一页的页面开始。( a)通过pdf_doc.getPage((page-1)).then(function(p){})从pdf blob中获取页面。
b)创建html元素,画布。创建renderContext(RenderContext encapsulates the information needed to produce a specific rendering from a RenderableImage)并向键canvasContext of renderContext添加画布的页面1.getContext(‘2d’)。然后,用p.render(renderContext).then(function(){}).在上面呈现pdf页面。
https://stackoverflow.com/questions/59557851
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