With NHLinearShadow you can add a shadow like this:

using a simple way!

You can add a near "Linear Shadow Color" choosing a color like [UIColor redColor] or you can use "Linear Shadow" based on a photo, this will find the average color and add a shadow

How to use?

1. Add the NHLinearShadow into your project

2. Import NHLinearShadow, #import "UIImageView+NHLinearShadow.h"

   if you want use a Linear Shadow Color use this: [UIImageView addShadowWithColor:"anUIColor"] inImageView:"anUIImageView"]; else if you want to use a Linear Shadow based on a photo use this: [UIImageView addShadowWithAverageColorInImage:"anUIImage" inImageView:"anUIImageView"];

Example