Reload collection view data from another view class

Question

I have two containers in a view. The top one has a collection view. I want to update my collection view from a button when a button is hit from the below container. My butto

Answer 1

Swift 4:

1st class:

NotificationCenter.default.post(name: NSNotification.Name("load"), object: nil)

Class with collectionView:

in viewDidLoad():

NotificationCenter.default.addObserver(self, selector: #selector(loadList(notification:)), name: NSNotification.Name(rawValue: "load"), object: nil)

and function:

@objc func loadList(notification: NSNotification) {
  self.collectionView.reloadData()
}