必须先要 引入 mui.js，然后参考具体代码
<!DOCTYPE html>
<html> <head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title></title>
<script type="text/javascript" src="js/mui.js"></script>
<link rel="stylesheet" type="text/css" href="css/mui.css" rel="external nofollow" /> <script type="text/javascript">
mui.init({
gestureConfig: {
longtap: true //默认为 false, 长按事件
}
}); mui.plusReady(function() {
document.addEventListener('longtap', function(e) {
var target = e.target; var bts = [{
title: "保存到手机"
}]; /**
* actionSheet：弹出系统选择按钮框
*/
plus.nativeUI.actionSheet({
cancel: "取消",
buttons: bts
}, function(e) { if(e.index > 0){
saveImage(target)
}
}); });
}); /**
* 1. 获取图片的链接
* 2. 创建下载并下载图片
* 3. 保存至相册
*/
function saveImage(target) {
var imgUrl = target.src;
var timestamp = (new Date()).valueOf();
var downLoader = plus.downloader.createDownload(imgUrl, {
method: 'GET',
filename: '_downloads/image/' + timestamp + '.png'
}, function(download, status) {
var fileName = download.filename;
/**
* 保存至本地相册
*/
plus.gallery.save(fileName, function() {
mui.toast("保存成功"); });
}); /**
* 开始下载任务
*/
try{
downLoader.start();
}catch(e){
//TODO handle the exception
mui.toast("请长按图片保存");
}
} </script>
</head> <body>
<div>
<img src="http://cdnzzz.vcgeek.cn/forward@2x.png" alt="" />
</div>
<div>
<h1>nnnnnn</h1>
</div> <div>
<img src="http://cdnzzz.vcgeek.cn/business@2x.png" alt="" />
</div>
</body></html>
注意：img 里面的 src 只能填写网络路径，否则下载不了。
效果展示
