使用 html2canvas 捕获基础知识

Question

我正在使用 html2canvas。如何捕获 DIV aaa 并将其打印在 DIV tt 中的 canvas avatar 中？

<div id="aaa">
    aaaaa<br />
    bbbbb
</div>

<div id="tt"> </div>

js:

html2canvas($('#aaa'), {
        onrendered: function(canvas) {
          var canv = $('<canvas />', { id: "avatar"});
          $('#tt').append(canv);
      var newImg = document.getElementById("avatar");
      newImg.src = canvas.toDataURL();
        }
      });

Answer 1

试试这个..

在 onrendered 事件函数中你会得到 canvas 元素，只是你需要把它放在你想要的地方。

html2canvas($('#aaa'), {
    onrendered: function(canvas) {
    $(canvas).attr('id','avatar');
    $('#tt').append(canvas);
  }   
});

请参阅此以获取更多信息.. http://html2canvas.hertzen.com/examples.html

Answer 2

这是一种方法：

https://jsfiddle.net/m1erickson/wtchz972/

<!doctype html>
<html>
<head>
<script src="https://rawgit.com/niklasvh/html2canvas/master/dist/html2canvas.min.js"></script>
<style>
    body{ background-color: ivory; }
    canvas{border:1px solid red;}
    #avatarCanvas{border:1px solid green;}

</style>
<script>
window.onload=(function(){

    var aaaDiv=document.getElementById('aaa');
    var ttDiv=document.getElementById('tt');

    html2canvas(aaaDiv).then(function(canvas) {
        // assign id:avatarCanvas to canvas 
        canvas.id='avatarCanvas';
        // append canvas to ttDiv
        ttDiv.appendChild(canvas);
    });

}); // end $(function(){});
</script>
</head>
<body>
    <h4>This is 'aaa'</h4>
    <div id="aaa">
        aaaaa
        <br>
        bbbbb
    </div> 
    <h4>This is 'tt'</h4>   
    <div id='tt'></div>
</body>
</html>

使用 html2canvas 捕获基础知识

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