Load data from firebase to tableview inside a collection cell - ios

Question

I have a collection view where you scroll vertically. Inside each collection view cell I have a tableview which consists of comments. I load data from Firebase to both the collection view and tableview.
What I'm trying to do is to load specific data and the correct number of rows In the tableview inside the collection cell based on the photoID from a photo in my collection cell. Basically I want the right comments and the right numberofrows to each tableview inside each collectionviewcell
The problem is that the comments doesn't appear in the right cells and also the numberofrows in the tableviews In the different collection view cells are not correct.
in my collectionviewcontroller I use this Func to get my data.
func fetchData(){
let ref = Database.database().reference()
ref.child("photos").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject]{
let photo = Photo(dictionary: dictionary)
photo.videoId = snapshot.key
self.photos.append(photo)
if let photoId = photo.videoId{
self.photoTimeStampDictionary[photoId] = photo
}
DispatchQueue.main.async {
self.cView.reloadData()
}
self.attemptReloadCollectionView()
}
}, withCancel: nil)
}
then in cellforitem.
let photo = photos[indexPath.row]
cell.photo = photo
return cell
// I then use the photo variable inside my collectionviewcell.
This is my database structure:
**Comments**
**randomID**
[commenttext: "blabla"]
[uid: the senders UID]
[photo ID: the photoID]
**Photos**
**photo ID**
[and some more info here ofc]
My model class.
class Comment: NSObject {
var commentId: String?
var commentText: String?
var photoId: String?
var timeStamp: NSNumber?
var uid: String?
init(dictionary: [String: AnyObject]) {
self.commentId = dictionary["commentid"] as? String
self.commentText = dictionary["commenttext"] as? String
self.photoId = dictionary["photoid"] as? String
self.timeStamp = dictionary["timestamp"] as? NSNumber
self.uid = dictionary["uid"] as? String
}
}
The collection view works fine and just as it should.
This is what I have tried. (This is inside the collectionviewcell)
var comments = [Comment]()
func fetchData(){
let ref = Database.database().reference()
ref.child("comments").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject]{
let comment = Comment(dictionary: dictionary)
// comment.commentId = snapshot.key
self.comments.append(comment)
DispatchQueue.main.async {
self.commentsTableView.reloadData()
}
}
}, withCancel: nil)
}
and then in cellforrow:
let comment = comments[indexPath.row]
if comment.photoId == self.photo?.videoId{
cell.commentText.text = comment.commentText
}
photo is my model class for all info connected to setting up the collection view cell except for the tableview. With the above code one specific comment that belongs to one specific picture ends up showing at several photos sometimes.
I would be grateful for help with this problem. I can imagine it has to do something with how you reload the tableview and also detect the index path in the collection view.
Thanks in advance.
Best regards,
Wurzel

Answer 1

Try removing the asynchronous func :
var comments = Comment
func fetchData(){
let ref = Database.database().reference()
ref.child("comments").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: AnyObject]{
let comment = Comment(dictionary: dictionary)
// comment.commentId = snapshot.key
self.comments.append(comment)
self.commentsTableView.reloadData()
}
}, withCancel: nil)
}
If that's indeed the issue, I will elaborate further.