基于html2canvas的长图分享

<span class="ui label yellow compacted basic" onclick="$('#set_campaign_modal').modal({allowMultiple: true}).modal('show');" style="cursor: pointer;">长图分享</span>

<div class="ui modal" id="set_campaign_modal"><i class="close icon"></i><img src="" alt="" class="down_img" style=" display: block;width: 100%; height: 100%;margin: 0 auto;"/></div>

<script type="text/javascript" src="http://html2canvas.hertzen.com/dist/html2canvas.js"></script>

<script type="text/javascript">
	html2canvas($('.show_box')[0], {allowTaint : true,scale:1,taintTest:true,logging:false,useCORS:true}).then(function(canvas) {
	 $('.down_img').attr('src',canvas.toDataURL("image/png"));
	});
</script>