[英]Html5 multiple canvas with image on one page
我有这个 php 代码
@for($i=1;$i<=$cate;$i++)
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12" style="min-height: 412px" id="etalon">
<canvas id="respondCanvas_{{$i}}" class="respondCanvas" style="position: absolute"></canvas>
<div class="col-md-2"><h3>
</h3></div>
</div>
</div>
<!-- /.row -->
@endfor
和这个 javascript
var imageObj = new Image();
imageObj.src = "/frontEnd/images/coupons/back1.png";
for (var i=1;i<=2;i++) {
var canvas = document.getElementById("respondCanvas_"+i);
alert(i);
var context = canvas.getContext('2d');
imageObj.onload = function () {
context.drawImage(imageObj, 0, 0);
};
}
我想创建动态行,每个行都有它的画布。 谁能帮我? 谢谢
我已经设法解决了! 不管怎么说,还是要谢谢你 !
$(document).ready( function(){
var count = document.getElementsByClassName('respondCanvas').length;
var imageObj = new Image();
imageObj.src = "/frontEnd/images/coupons/back1.png";
var canvas = new Array();
var context = new Array();
for (var i=1;i<=count;i++) {
canvas[i] = document.getElementById("respondCanvas_"+i);
context[i] = canvas[i].getContext('2d');
}
imageObj.onload = function () {
for (var i=1;i<=count;i++) {
context[i].drawImage(imageObj, 0, 0);
}
};
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