i am new to ios development. I just came to know that their are two delegates in Foundation that are retained. My understanding says that a delegate must always be loosely coupled. So why these two are specifically retained?
Thanks
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i am new to ios development. I just came to know that their are two delegates in Foundation that are retained. My understanding says that a delegate must always be loosely coupled. So why these two are specifically retained?
Thanks
Commonly, a delegate is needed for the entire lifetime of an object, which is why it is usually a weak/non-retained reference. Otherwise, neither the object nor the delegate could ever be deallocated, because they would both wait for the other to go away.
In the case of
NSURLConnectionandCAAnimationhowever, the delegate is actually only needed for a specific task that has some sort of “finished” state. When the connection finishes loading/is cancelled or the animation has reached its end, they can just release the delegate themselves and thus break the retain cycle.