UICollectionView inside UITableViewCell how pass data to Uicollectionviewcell - swift

Question

I have a tableview controller with a collectionview inside it , in the tableviewcell i implemented a collection view with horizontal scrolling, the data appears not correct
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = friendsCollectionView.dequeueReusableCell(withReuseIdentifier: "friends", for: indexPath) as! friendCollectioncell
friendsCollectionView.delegate = self
friendsCollectionView.dataSource = self
let ava = Myfriends[indexPath.item]["ava"] as! String
let firstname = Myfriends[indexPath.row]["firstName"] as! String
let lastname = Myfriends[indexPath.row]["lastName"] as! String
return cell
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return Myfriends.count
}
problem is in
return Myfriends.count
always empty so not thing appears but if a change to 1 or 2. it works ok
in uitableviewcontroller:
var myFriends: [Dictionary<String, Any>] = []
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// section 1 which includes 1 cell that shows my friends
if indexPath.section == 0 {
// accessing cell in main.storyboard that has id "friends". This cell stores my friends
let cell = tableView.dequeueReusableCell(withIdentifier: "friends", for: indexPath) as! friends
cell.Myfriends = myFriends
}
return cell
// section 2 (or any other sections) that shows all the posts of the user
} else {
return cell
}
Thank You in advance

Answer 1

Edit:
If I understand this right:
problem is in return Myfriends.count always empty so not thing appears but if a change to 1 or 2. it works ok
probably your collectionView(_:numberOfItemsInSection:) is called before you this cell.Myfriends = myFriends is set.
In your friends tableViewCell:
class friends: UITableViewCell .. {
...
var Myfriends: [Friend] {
didSet {
friendsCollectionView.reloadData()
}
}
}
Imho your collectionView(_:numberOfItemsInSection:) isn't called at all.
This code
friendsCollectionView.delegate = self
friendsCollectionView.dataSource = self
in your collectionView(_:cellForItemAt:) is useless, because if this method is called, dataSource (and probably delegate) are already set correctly.
Instead, change your tableView(_:cellForRowAt:) to
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0 {
let cell = tableView...
cell.friendsCollectionView.delegate = cell
cell.friendsCollectionView.dataSource = cell
return cell
} else {
...
}
}
or set friendsCollectionView dataSource and delegate in your friends cell, where you init your collectionView.
If that shouldn't help you, check where and how you populate your myFriends dictionary.
Besides that, I'd recommend that you create a struct Friend:
struct Friend {
let ava: String
let firstName: String
let lastName: String
}
and change your var myFriends to
var myFriends: [Friend] = []
That would make it easier and safer to access the values for your friendsCollectionCell:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = friendsCollectionView...
let friend = MyFriends[indexPath.item]
let ava = friend.ava
...
return cell
}