如何为UIImageView创建白色边框和黑色阴影？

#import  <QuartzCore/QuartzCore.h> 

[imageView.layer setBorderColor: [[UIColor whiteColor] CGColor]];
[imageView.layer setBorderWidth: 2.0];

someImageView.image = someUIImage;
someImageView.frame = CGRectMake(45, 25, 50, 50);
[someImageView.layer setBorderColor: [[UIColor whiteColor] CGColor]];
[someImageView.layer setBorderWidth: 2.0];
[someImageView.layer setShadowOffset:CGSizeMake(-3.0, 3.0)];
[someImageView.layer setShadowRadius:3.0];
[someImageView.layer setShadowOpacity:1.0];

#import  <QuartzCore/QuartzCore.h>