常用到的代码

一、保存图片到相册

1、 UIImageWriteToSavedPhotosAlbum( image, self, @selector(..) , nil ) ; 

2、保存当前界面到相册

    #import  <QuartzCore/QuartzCore.h>   

    UIGraphicsBeginImageContext(currentView.bounds .size ); //currentView 当前的 view   

    [currentView. layer  renderInContext: UIGraphicsGetCurrentContext()];   

    UIImage *viewImage =  UIGraphicsGetImageFromCurrentImageContext();   

    UIGraphicsEndImageContext();  

    UIImageWriteToSavedPhotosAlbum(viewImage, nil , nil , nil );