截图生成图片并保存到相册

    // 保存到相册

    $("#content").on("click", "#savepic", function () {

        $("#waitingupload").removeClass("heisebghid").addClass("heisebg");

        // 调用html2canvas生成截图

        html2canvas($("#orderInfo")[0], {

            allowTaint: true,

            taintTest: false,

            onrendered: function (canvas) {

                canvas.id = "mycanvas";

                //var newImg = document.createElement("img");

                //newImg.crossOrigin = "*";

                //var ctx = canvas.getContext("2d");

                //ctx.drawImage(newImg, 0, 0);



                ////生成base64图片数据

                //var dataUrl = canvas.toDataURL();

                //newImg.src = dataUrl;

                //document.body.appendChild(newImg);



                var dataUrl = canvas.toDataURL("image/png", 1);

                // 调用接口解码，获取图片

                getimgByBase64(dataUrl);

            }

        });



    });

// Base64生成图片

function getimgByBase64(base64code) {

    console.log(base64code);

    $.ajax({

        type: "POST",

        url: configManager.RequstUrl + "api/common/base64decode",

        async: true,

        data: { "base64code": base64code }

    }).done(function (data) {

        if ("success" != data.state) { console.log(data.message); plus.nativeUI.alert("保存失败!"); return; }

        // 保存到相册

        saveGallery(data.url);

    });

}

function saveGallery(url) {

    var dtask = plus.downloader.createDownload(url, {}, function (d, status) {

        // 下载完成

        if (status == 200) {

            console.log(d.filename);

            var filepath = plus.io.convertLocalFileSystemURL(d.filename);

            console.log(filepath);

            // 保存相册

            plus.gallery.save(filepath);

            plus.nativeUI.alert("保存成功");

            // 删除

            plus.io.resolveLocalFileSystemURL(filepath, function (entry) {

                entry.remove(function (e) { }, function (e) { });

            }, function (e) { });



        } else {

            plus.nativeUI.alert("Download failed: " + status);

        }



        $("#waitingupload").removeClass("heisebg").addClass("heisebghid");

    });

    //dtask.addEventListener( "statechanged", onStateChanged, false );

    dtask.start();

}

html2canvas截图js的介绍及下载地址如下：http://www.oschina.net/p/html2canvas