ios 图片添加阴影

UIimageView *imageView = [[UIImageView alloc ] init];

imageView.layer.shadowColor = [UIColor blackColor].CGColor;

imageView.layer.shadowOffset = CGSizeMake(3,2);

imageView.layer.shadowOpacity = 0.6;

imageView.layer.shadowRadius = 1.0;

imageView.clipsToBounds = NO;