Delegates - Functionality

Question

I am new to iPhone development, just started learning on my own.

While proceding i came up with a word Delegate. Can any one please explain them to me with an example.

Answer 1

Delegates in ObjektiveC are objects with a specific set of methods, which are called by the delegate-using object when something happens. This way, you can avoid subclassing the main object in order to track some state changes.

Wikipedia has something about that