标签:back text round bsp oda html ext 超过 ffffff
//需要引入html2canvas.js、jquery.js文件
html:
<button type="button" class="btn btn-primary " id="pdfDown" >PDf导出</button>
js:
$("#pdfDown").on(‘click‘,function(){ var element = $(".orgchart"); // 这个dom元素是要导出pdf的div容器,即要生成PDF的div var w; // 获得该容器的宽 var h; // 获得该容器的高
//因为我是两种分布情况,故而有了下边的if、else,如果只有一种用else里的即可
if($(".btnActive").attr(‘id‘) == ‘Hmerage‘){ h = element.outerWidth() w = element.outerHeight() }else{ w = element.outerWidth() h = element.outerHeight() } var offsetTop = element.offset().top; // 获得该容器到文档顶部的距离 var offsetLeft = element.offset().left; // 获得该容器到文档最左的距离 var canvas = document.createElement("canvas"); canvas.width = w * 2; // 将画布宽&&高放大两倍 canvas.height = h * 2; var context = canvas.getContext("2d"); var scale = 2; context.scale(2, 2); context.translate(-offsetLeft, -offsetTop); var opts = { scale: scale, canvas: canvas, width: w, height: h, useCORS: true, background: ‘#ffffff‘ } html2canvas(element, opts).then(function (canvas) { var contentWidth = canvas.width; var contentHeight = canvas.height; //一页pdf显示html页面生成的canvas高度; var pageHeight = contentWidth / 592.28 * 841.89; //未生成pdf的html页面高度 var leftHeight = contentHeight; //页面偏移 var position = 0; //a4纸的尺寸[595.28,841.89],html页面生成的canvas在pdf中图片的宽高 var imgWidth = 595.28*1.01; var imgHeight = 592.28 / contentWidth * contentHeight*1.01; var pageData = canvas.toDataURL(‘image/jpeg‘, 1.0);
var pdf = new jsPDF(‘‘, ‘pt‘, ‘a4‘); //有两个高度需要区分,一个是html页面的实际高度,和生成pdf的页面高度(841.89) //当内容未超过pdf一页显示的范围,无需分页 if (leftHeight < pageHeight) { pdf.addImage(pageData, ‘JPEG‘, 0, 0, imgWidth, imgHeight); } else { // 分页 while (leftHeight > 0) { pdf.addImage(pageData, ‘JPEG‘, 0, position, imgWidth, imgHeight) leftHeight -= pageHeight; position -= 841.89; //避免添加空白页 if (leftHeight > 0) { pdf.addPage(); } } } pdf.save(‘content.pdf‘); }) })
标签:back text round bsp oda html ext 超过 ffffff
原文地址:https://www.cnblogs.com/C-target/p/11335293.html