How to call a method on collection view all cells?

Question

On long press gesture on a collectionview cell I want to do some animation on all collectionview cells. How to achieve that? One way is to reload the collectionview. I am just curious is there another way to achieve that?

Answer 1

Couldn't you use notifications?

In your UICollectionViewCell initialization code:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(doFancyAnimation:) name:@"MyNotification" object:nil];

And then from your gesture recognizer, post a notification:

[[NSNotificationCenter defaultCenter] postNotificationName:@"MyNotification" object:self];