Adapted to iOS8 or above，Use Photos framework to get all the album pictures or video, save the picture to the system album or save to the custom album, delete a custom photo album, etc.; 适应于iOS8以上 ，运用Photos 框架 获取所有相册图片或视频，保存图片到系统相册或同时保存到自定义相册，单独删除某自定义相册的图片等；
