Was object hit by a ray

Is there a way to check if an object was hit by a ray rather than if a ray hit an object?

I want an event to be triggered when a player presses a button, and I want the button to be that "object".

 

you do the same method as you would check to see that object, but in the end you could broadcast a message to that object stating that it was hit.

It is probably better to do it the conventional way.

 

Add OnMouseDown event on C# script of the object, and it should detect click. Some use raycasts, but since it will be done internally anyway you might aswell use the events made by Unity.

 

This. Except you should be using the EventSystem OnPointerXXX interfaces instead of OnMouseXXX.