iphone 开发 截屏 代码的实现， 保存到系统相册中去-iphone development screenshots implementation code, save the album to go to the system

私人相册：可以创建相册并将系统中私密图片添加在相册，对相册图片进行管理-Private Photo Gallery: You can create photo albums and add pictures private system in the album of the album image management