Accessing an array in another view controller - swift

Question

I have an array of NSObjects that I need to read in another viewcontroller. However I'm unsure what level I should be setting the data for it.
This screen shot below best explains what I'm trying to do. Each HomeController has a title, members list, description and inset collectionview (yellow bar). I need the collection views number of cells to equal the number of members.
I tried creating a reference to HomeController inside the inset collectionview by using lazy var but that got the the error:
fatal error: Index out of range
lazy var homeController: HomeController = {
let hc = HomeController()
hc.liveCell = self
return hc
}()
Again this is done from within the inset collectionview
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath :
IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: profileImageCellId, for: indexPath) as! profileImageCell
let room = homeController.rooms[indexPath.row]
print(room.members?.count)
return cell
}
Any suggestions?
EDIT
Data is added to the array using this function
var rooms = [Room]()
func fetchAllRooms(){
Database.database().reference().child("rooms").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject] {
let room = Room()
room.rid = snapshot.key
room.setValuesForKeys(dictionary)
self.rooms.append(room)
print(snapshot)
DispatchQueue.main.async(execute: {
self.collectionView?.reloadData()
})
}
print("end of room snap")
}, withCancel: nil)
}
Here is the cell for item at index path at the HomeController level
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
var cell = UICollectionViewCell()
let section = indexPath.section
let liveCell = collectionView.dequeueReusableCell(withReuseIdentifier: LiveCellId, for: indexPath) as! LiveCell
let cell = liveCell
let room = rooms[indexPath.row]
liveCell.liveStreamNameLabel.text = room.groupChatName
liveCell.descriptionLabel.text = room.groupChatDescription
return cell
}

Answer 1

You need to check the count of your array in order to prevent the crash Index out of range
if homeController.rooms.count > indexPath.row {
let room = homeController.rooms[indexPath.row]
print(room.members?.count)
}

Answer 2

Can you Debug and share below two things then we can look further on this
Check whats the index path you are getting
Check if your array have data