iphone开发 跟UIImageView图片加边框

首先导入 #import <QuartzCore/QuartzCore.h>

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:imagefileName]];

    imageView.layer.borderColor = [UIColor grayColor].CGColor;

   imageView.layer.masksToBounds=YES;   
    imageView.layer.cornerRadius=1.0;

    imageView.layer.borderWidth = 0.5f;