这里我有多个图表，这些图表可以是动态变化的多个图表，这里仅供参考，我只显示了2。我需要下载一些div的内容以及页面中的所有图表。我可以可以使用jspdf插件执行此操作，但是当出现多个图表时，我无法下载该文件。我已经更新了http://plnkr.co/edit/Z3hJcC8pgzZxXPLWpfBw?p=preview插件中的工作代码，下面是我的代码。 可以在上述网址上找到其他库。
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="jspdf.debug.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/series-label.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.min.js"></script>
<script src="https://github.com/devongovett/pdfkit/releases/download/v0.6.2/pdfkit.js"></script>
<script src="rgbcolor.js"></script>
<script src="canvg.js"></script>
<script src="script.js"></script>
</head>
<body>
<input type="button" onclick="chartWithContentDownload()" value="download" /> Please click on this button to get chart with html content on pdf
<div class="white-back row" style="padding: 1.5rem;" id="tvgMainCnt">
<div id="top-content">
<div>
<div>
logo
</div>
</div>
<div style="margin-top: 1rem;">
<p>
Dear members,
</p>
</div>
<div>
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book
</div>
<br />
<div style="margin-top: 1rem;">
<p>
Download of chart with html content should work with multiple chart.
</p>
</div>
</div>
<div id="middle-content">
<div id="testchart"></div>
<div id="testchart2"></div>
</div>
<div id="bottom-content">
<p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. </p>
</div>
</div>
$(document).ready(function(){
Highcharts.chart('testchart', {
title: {
text: 'Solar Employment Growth by Sector, 2010-2016'
},
subtitle: {
text: 'Source: thesolarfoundation.com'
},
yAxis: {
title: {
text: 'Number of Employees'
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'middle'
},
plotOptions: {
series: {
label: {
connectorAllowed: false
},
pointStart: 2010
}
},
series: [{
name: 'Installation',
data: [43934, 52503, 57177, 69658, 97031, 119931, 137133, 154175]
}, {
name: 'Manufacturing',
data: [24916, 24064, 29742, 29851, 32490, 30282, 38121, 40434]
}, {
name: 'Sales & Distribution',
data: [11744, 17722, 16005, 19771, 20185, 24377, 32147, 39387]
}, {
name: 'Project Development',
data: [null, null, 7988, 12169, 15112, 22452, 34400, 34227]
}, {
name: 'Other',
data: [12908, 5948, 8105, 11248, 8989, 11816, 18274, 18111]
}],
responsive: {
rules: [{
condition: {
maxWidth: 500
},
chartOptions: {
legend: {
layout: 'horizontal',
align: 'center',
verticalAlign: 'bottom'
}
}
}]
}
});
Highcharts.chart('testchart2', {
title: {
text: 'Solar Employment Growth by Sector, 2010-2016'
},
subtitle: {
text: 'Source: thesolarfoundation.com'
},
yAxis: {
title: {
text: 'Number of Employees'
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'middle'
},
plotOptions: {
series: {
label: {
connectorAllowed: false
},
pointStart: 2010
}
},
series: [{
name: 'Installation',
data: [43934, 52503, 57177, 69658, 97031, 119931, 137133, 154175]
}, {
name: 'Manufacturing',
data: [24916, 24064, 29742, 29851, 32490, 30282, 38121, 40434]
}, {
name: 'Sales & Distribution',
data: [11744, 17722, 16005, 19771, 20185, 24377, 32147, 39387]
}, {
name: 'Project Development',
data: [null, null, 7988, 12169, 15112, 22452, 34400, 34227]
}, {
name: 'Other',
data: [12908, 5948, 8105, 11248, 8989, 11816, 18274, 18111]
}],
responsive: {
rules: [{
condition: {
maxWidth: 500
},
chartOptions: {
legend: {
layout: 'horizontal',
align: 'center',
verticalAlign: 'bottom'
}
}
}]
}
});
});
function chartWithContentDownload() {
var doc = new jsPDF('portrait', 'pt', 'a4', true);
var elementHandler = {
'#ignorePDF': function(element, renderer) {
return true;
}
};
var source = document.getElementById("top-content");
doc.fromHTML(source, 15, 15, {
'width': 560,
'elementHandlers': elementHandler
});
var svg = document.querySelector('svg');
var canvas = document.createElement('canvas');
var canvasIE = document.createElement('canvas');
var context = canvas.getContext('2d');
var DOMURL = window.URL || window.webkitURL || window;
var data1 = (new XMLSerializer()).serializeToString(svg);
canvg(canvas, data1);
var svgBlob = new Blob([data1], {
type: 'image/svg+xml;charset=utf-8'
});
var url = DOMURL.createObjectURL(svgBlob);
var img = new Image();
img.onload = function() {
context.canvas.width = $('#testchart').find('svg').width();
console.log(context.canvas.width)
context.canvas.height = $('#testchart').find('svg').height();
context.drawImage(img, 0, 0);
// freeing up the memory as image is drawn to canvas
DOMURL.revokeObjectURL(url);
var dataUrl;
if (isIEBrowser()) { // Check of IE browser
var svg = $('#testchart').highcharts().container.innerHTML;
canvg(canvasIE, svg);
dataUrl = canvasIE.toDataURL('image/JPEG');
}
else{
dataUrl = canvas.toDataURL('image/jpeg');
}
doc.addImage(dataUrl, 'JPEG', 20, 300, 560, 350);
var bottomContent = document.getElementById("bottom-content");
doc.fromHTML(bottomContent, 15, 650, {
'width': 560,
'elementHandlers': elementHandler
});
setTimeout(function() {
doc.save('TestChart.pdf');
}, 2000);
};
img.src = url;
};
function isIEBrowser(){
var ieBrowser;
var ua = window.navigator.userAgent;
var msie = ua.indexOf("MSIE ");
if (msie > 0 || !!navigator.userAgent.match(/Trident.*rv\:11\./)) // Internet Explorer
{
ieBrowser = true;
}
else //Other browser
{
console.log('Other Browser');
ieBrowser = false;
}
return ieBrowser;
};
答案 0 :(得分：0)
这里的第一个问题是代码仅处理一个图表/图像。该方法应包括循环或对各种元素进行多重处理。
我已经设法编辑了您的代码，这是我的结果： http://plnkr.co/edit/qRT4dqJDMU8mTSocL3tb?p=preview
var elements = [$('#testchart'), $('#testchart2')];
for (let i in elements) {
var svg = document.querySelector('svg');
var canvas = document.createElement('canvas');
var canvasIE = document.createElement('canvas');
var context = canvas.getContext('2d');
var data1 = (new XMLSerializer()).serializeToString(svg);
canvg(canvas, data1);
var svgBlob = new Blob([data1], {
type: 'image/svg+xml;charset=utf-8'
});
var url = DOMURL.createObjectURL(svgBlob);
var img = new Image();
img.onload = function() {
context.canvas.width = elements[i].find('svg').width();
context.canvas.height = elements[i].find('svg').height();
context.drawImage(img, 0, 0);
// freeing up the memory as image is drawn to canvas
DOMURL.revokeObjectURL(url);
var dataUrl;
if (isIEBrowser()) { // Check of IE browser
var svg = $(elements[i]).highcharts().container.innerHTML;
canvg(canvasIE, svg);
dataUrl = canvasIE.toDataURL('image/JPEG');
} else {
dataUrl = canvas.toDataURL('image/jpeg');
}
doc.addPage();
doc.addImage(dataUrl, 'JPEG', 20, 20, 560, 350);
};
img.src = url;
}
var bottomContent = document.getElementById("bottom-content");
doc.fromHTML(bottomContent, 15, 650, {
'width': 560,
'elementHandlers': elementHandler
});
setTimeout(function() {
doc.save('TestChart.pdf');
}, 2000);
具有3页的PDF，包括两个图表和其他内容。 根据需要提供格式，清理和编辑。 希望对您有所帮助。