delegate desing pattern in objective C vs callback?

[itsaboutcode]

Hi folks,

I will really appreciate that if someone really explain it to me, what is the difference between Delegate design pattern used in Objective C vs callback method call? I have wasted my one week in understanding Delegate design pattern and this is what i have understood.

Delegate design pattern = callback method call.

I am right or wrong, i am not really sure, some can explain?