<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style>
img{
width: 200px;
height: 150px;
}
</style>
</head>
<body>
<img src="http://pic.pptbz.com/201506/2015070581208537.JPG" />
<img src="http://img.taopic.com/uploads/allimg/121014/234931-1210140JK414.jpg" />
<img src="http://img.zcool.cn/community/01c92f56597f686ac7251c94e76e51.jpg" />
<img src="http://img.zcool.cn/community/01888f5922bad7b5b3086ed4cc3711.jpg" />
<br /><br />
<button onclick="packageImages()">packageImages</button><span id="status"></span><br /><br />
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/jszip.min.js"></script>
<script type="text/javascript" src="js/FileSaver.js"></script>
</body>
</html>
function packageImages(){
$('#status').text('處理中。。。。。');
var imgs = $('img');
var imgsSrc = [];
var imgBase64 = [];
var imageSuffix = [];//圖片后綴
var zip = new JSZip();
zip.file("readme.txt", "案件詳情資料\n");
var img = zip.folder("images");
for(var i=0;i<imgs.length;i++){
var src = imgs[i].getAttribute("src");
var suffix = src.substring(src.lastIndexOf("."));
imageSuffix.push(suffix);
getBase64(imgs[i].getAttribute("src"))
.then(function(base64){
imgBase64.push(base64.substring(22));
//console.log(base64);//處理成功打印在控制台
},function(err){
console.log(err);//打印異常信息
});
}
function tt(){
setTimeout(function(){
if(imgs.length == imgBase64.length){
for(var i=0;i<imgs.length;i++){
img.file(i+imageSuffix[i], imgBase64[i], {base64: true});
}
zip.generateAsync({type:"blob"}).then(function(content) {
// see FileSaver.js
saveAs(content, "images.zip");
});
$('#status').text('處理完成。。。。。');
}else{
//console.log('imgs.length:'+imgs.length+',imgBase64.length:'+imgBase64.length);
$('#status').text('已完成：'+imgBase64.length+'/'+imgs.length);
tt();
}
},100);
}
tt();
}
//傳入圖片路徑，返回base64
function getBase64(img){
function getBase64Image(img,width,height) {//width、height調用時傳入具體像素值，控制大小 ,不傳則默認圖像大小
var canvas = document.createElement("canvas");
canvas.width = width ? width : img.width;
canvas.height = height ? height : img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
var dataURL = canvas.toDataURL();
return dataURL;
}
var image = new Image();
image.crossOrigin = 'Anonymous';
image.src = img;
var deferred=$.Deferred();
if(img){
image.onload =function (){
deferred.resolve(getBase64Image(image));//將base64傳給done上傳處理
}
return deferred.promise();//問題要讓onload完成后再return sessionStorage['imgTest']
}
}
