Detecting Input with GUI Textures?

How does one perform a check to see if a Gui Texture is pressed, in the context of the IOS

Please do not create multiple questions regarding the same topic.

I'm not sure iPhone-wise, but Will Goldstone has a good tutorial on GUI Textures and Mouse Events on Unity3D Student.

It covers changing the GUI texture on a MouseEnter and MouseExit, and performing an action when the texture is pressed.