求教!截屏的图片怎么才能保存到相册啊

screenShoot(){
    if (!cc.sys.isNative) return;
    let dirpath = jsb.fileUtils.getWritablePath() + 'ScreenShoot/';
    if (!jsb.fileUtils.isDirectoryExist(dirpath)) {
        jsb.fileUtils.createDirectory(dirpath);
    }
    let name = 'ScreenShoot-' + (new Date()).valueOf() + '.png';
    let filepath = dirpath + name;
    let size = cc.winSize;
    let rt = cc.RenderTexture.create(size.width, size.height);
    cc.director.getScene()._sgNode.addChild(rt);
    rt.setVisible(false);
    rt.begin();
    cc.director.getScene()._sgNode.visit();
    rt.end();
    var that = this;
    rt.saveToFile('/sdcard/' + name, cc.IMAGE_FORMAT_PNG, () =>{
        console.log('save succ');
        cc.loader.load('/sdcard/' + name, function (err, tex) {
            if (err) {
                cc.error( err);
            } else {
                var spriteFrame = new cc.SpriteFrame(tex);
                if (spriteFrame) {
                    that.headSprite.spriteFrame = spriteFrame;
                }
            }
        });
    });
}

用这种方法实现了 保存但是相册看不到这张截屏

1.7.0

要存放到相册已经是原生平台的事了