[英]html2canvas save image after change img src
我正在使用html2canvas將html保存為圖像。 我的html代碼如下
<div id="target" class="center-block imgStruc" style="width:92%;">
<div class="center-block eventName makeMeDraggable box">
<div class="text">
<div class="text1">Test Data</div>
</div>
</div>
<div class="imgCont clearfix"><img src="http://mydomainname/image.jpg" alt="" class="img-responsive" id="changeImg"></div>
</div>
<div class="col-sm-6">
<input type="submit" value="Save & Continue »" onClick="snap_onclick()"/>
<form method="POST" enctype="multipart/form-data" action="savecard.php" id="myForm">
<input type="hidden" name="img_val" id="img_val" value="" />
</form>
</div>
我的JavaScript如下
function snap_onclick() {
$('#target').html2canvas({
onrendered: function (canvas) {
$('#img_val').val(canvas.toDataURL("image/png"));
document.getElementById("myForm").submit();
}
});
}
目標div的圖像已創建。 但是當我使用以下jQuery代碼更改changeImg的圖像src時
function changeImage()
{
$('#changeImg').attr('src','http://mydomainname/path-to-image/image.jpg');
}
然后單擊“保存”按鈕,它將創建僅包含文本部分的圖像,但尚未出現更改的圖像。
save.php如下
<?php
//Get the base-64 string from data
//echo $_POST['img_val'];
$filteredData=substr($_POST['img_val'], strpos($_POST['img_val'], ",")+1);
//Decode the string
$unencodedData=base64_decode($filteredData);
//Save the image
file_put_contents('img.png', $unencodedData);
?>
<h2>Save the image and show to user</h2>
<table>
<tr>
<td>
<a href="img.png" target="blank">
Click Here to See The Image Saved to Server</a>
</td>
<td align="right">
<a href="index.php">
Click Here to Go Back</a>
</td>
</tr>
<tr>
<td colspan="2">
<br />
<br />
<span>
Here is Client-sided image:
</span>
<br />
<?php
//Show the image
echo '<img src="'.$_POST['img_val'].'" />';
?>
</td>
</tr>
</table>
<style type="text/css">
body, a, span {
font-family: Tahoma; font-size: 10pt; font-weight: bold;
}
</style>
新圖像位於同一域中。
好的,不要像以前那樣添加按鈕...。您有這樣的html嗎?(我在線上和其他人一起吸收了圖像...。)
<div class="col-md-3 col-sm-4 col-xs-4 single-right-grid-left">
<a onclick="changeImage()"> <img style="width:50px;" id="drag1" class="drag" alt="" src="http://beblex.it/wp/wp-content/uploads/2014/05/Online1.jpg">
</a>
</div>
<div id="target" class="center-block imgStruc" style="width:92%;">
<div class="center-block eventName makeMeDraggable box">
<div class="text">
<div class="text1">Test Data</div>
</div>
</div>
<div class="imgCont clearfix">
<img src="http://www.bottegamonastica.org/wp-content/uploads/Finalmente-Online.jpg" alt="" class="img-responsive" id="changeImg" style="width:50px;">
</div>
</div>
<div class="col-sm-6">
<input type="submit" value="Save & Continue »" onClick="snap_onclick()"/>
<form method="POST" enctype="multipart/form-data" action="savecard.php" id="myForm">
<input type="hidden" name="img_val" id="img_val" value="" />
</form>
</div>
js與您粘貼的相同。...
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