js代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>pic storage demo</title>
<link rel="stylesheet" href="">
</head>
<body>
<script type="text/javascript" charset="utf-8" >
var src = "20170122161717.png";
function set(key){
var img = document.createElement('img');
img.addEventListener("load",function(){
var imgCanvas = document.createElement("canvas");
imgContext = imgCanvas.getContext("2d");
imgCanvas.width = this.width;
imgCanvas.height = this.height;
imgContext.drawImage(this,0,0,this.width,this.height);
try{
var imgAsDataURL = imgCanvas.toDataURL("image/png");
localStorage.setItem(key,imgAsDataURL);
}catch(e){
console.log("storage failed" + e);
}
},false);
img.src = src;
}
function get(key){
var srcStr = localStorage.getItem(key);
var imgObj = document.createElement('img');
imgObj.src = srcStr;
document.body.appendChild(imgObj);
}
</script>
</body>
</html>
注意:图片和文件要在同一个域内
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