相关疑难解决方法(0)

我正在使用jspdf在浏览器中创建PDF.我有多个图表有svg作为图表数据.为了向pdf添加数据,我正在使用canvas将svg转换为png,然后使用canvas.toDataURL方法将Base64 Data转换为png .在所有这些转换之后,jspdf创建的文件大小很大(大约50 MB).下面是图表数据和画布div的代码.

newdiv = document.createElement("div");
newdiv.className = "big_Con_graph big_Con_graph0";
newdiv.style.height = "0px";
newdiv.id = "big_Con_graph" + id;

下面是SVG图表加载的尺寸.

document.getElementById("big_Con_graph" + id).style.display = "block";
var big_chartReference = FusionCharts("big_myChartId"+id);
if(big_chartReference != null){
    big_chartReference.dispose();
}
var big_width = "1088";
var big_height = "604";

现在,下面是转换上面的图形SVG数据并添加到PDF的代码.

var elem_graph = $($('.big_Con_graph,big_Con_graph0')[count]).clone(true);
svgString = $(elem_graph).find("span").html();
var img = document.createElement('img');
var DOMURL = self.URL || self.webkitURL || self;
var svg = new Blob([svgString], {type: "image/svg+xml;charset=utf-8"});
var url = DOMURL.createObjectURL(svg);
img.onload = pdfAfterImageLoad(img,pdf,imgLoadSequence,DOMURL,totalReports,reportName);
img.src = …