ImageView with Border iPhone

UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];

UIImage *img = [UIImage imageNamed:@"image.png"];

imgView.image = img;

imageView.contentMode = UIViewContentModeScaleAspectFit;

imageView.layer.cornerRadius = 5;

imageView.layer.borderWidth = 1.0f;

CGColorSpaceRef space = CGColorSpaceCreateDeviceRGB();

CGFloat values[4] = {0.5, 0.5, 0.5, 1.0}; 

CGColorRef grey = CGColorCreate(space, values); 

imageView.layer.borderColor = grey ;

CGColorRelease(grey);

CGColorSpaceRelease(space);