核心部分都有代码注释，如有不懂得地方，请留言，必答
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>canvas实现人物运动</title>
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<style>
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*{padding:0;margin:0;}
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</style>
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</head>
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<body>
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<canvas id="myCanvas" width="200" height="200" style="border:1px solid #ccc"></canvas>
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<script>
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setInterval(run,1000);
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var src1="images/1.jpg";
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var src2="images/2.jpg";
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var src3="images/3.jpg";
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var imgArr=[src1,src2,src3]; //要循环的图片数组
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var im=new Image(); //新建一个图片对象
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im.src=src1;
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var num=0;
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function run(){
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var c=document.getElementById('myCanvas');
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var ctx=c.getContext('2d');
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ctx.clearRect(0,0,200,200); //清除画布
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im.onload=function(){
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ctx.drawImage(im,0,0,200,200); //等图片加载完毕后在画布上画图
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}
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if(num>=imgArr.length-1){
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num=0;
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}
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else{
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num++;
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}
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im.src=imgArr[num];
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}
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run();
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</script>
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</body>
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</html>
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