通过实现UISCrollview代理方法来实现图片的浏览，及放大缩小。使用方法：viewWillAppear中实现showbigImage=[[ShowBigImageBoxalloc]init];[showbigImagesetShowBigImageBoxDelegate:self];viewWillDisappear中实现：[showbigImageclearBigImageBox];//在页面结束的时候清楚图片显示View显示图片：[showbigImageshowBigImageBox:array];//array为图片的链接地址