Question

我想使用http://html2canvas.hertzen.com/documentation.html讨论的html2canvas将html内容转换为图像。但是我没有正确地获得HighCharts的图像。在IE10上它呈现空白图像，在Chrome上呈现它的一部分。为此可以使用html2canvas。

Answer 1

Highcharts使用svg绘制图表。您将需要使用canvg库将此svg绘制到临时画布，然后在使用html2canvas截取屏幕截图后删除该画布。

以下是canvg：https://code.google.com/p/canvg/downloads/list

的链接

试试这个：

//find all svg elements in $container
//$container is the jQuery object of the div that you need to convert to image. This div may contain highcharts along with other child divs, etc
var svgElements= $container.find('svg');

//replace all svgs with a temp canvas
svgElements.each(function () {
    var canvas, xml;

    canvas = document.createElement("canvas");
    canvas.className = "screenShotTempCanvas";
    //convert SVG into a XML string
    xml = (new XMLSerializer()).serializeToString(this);

    // Removing the name space as IE throws an error
    xml = xml.replace(/xmlns=\"http:\/\/www\.w3\.org\/2000\/svg\"/, '');

    //draw the SVG onto a canvas
    canvg(canvas, xml);
    $(canvas).insertAfter(this);
    //hide the SVG element
    this.className = "tempHide";
    $(this).hide();
});

//...
//HERE GOES YOUR CODE FOR HTML2CANVAS SCREENSHOT
//...

//After your image is generated revert the temporary changes
$container.find('.screenShotTempCanvas').remove();
$container.find('.tempHide').show().removeClass('tempHide');

将html2Canvas与HighCharts一起使用

1 个答案: