Getting indexPath of tableView inside tableViewCell file during cell creation/dequeueing - ios

Question

I am creating a scrollable view filled with monthly calendars. I'm using a collection view to display a calendar inside a table view full of calendars. So each table view cell is a calendar for a specific month, and each collection view cell is a day. I have a separate swift file for the tableview cell from the view controller. Since each tableview cell is going to look different (because different months), the tableview cell needs to know which row it is placed in inside the tableview during its creation in dequeque cell function.
tableView.dequeueReusableCell(withIdentifier: "CalendarTableViewCell", for: indexPath)
I need to get the indexPath in the "for: indexPath" parameter inside the tableview cell file because the collectionview inside the tableview cell gets created when the tableview cell is dequeued. The contents of the collection view depends on which tableview row it's in. So how do I get that parameter?
Sorry for the long explanation, please help if possible. Thank you!

Answer 1

Create an array in UITableViewCell subclass and use that array in collection view data source methods.
class MonthCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
let datesArray = [String]()
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return datesArray.count
}
}
In tableView cellForRowAt method assign the date values and reload the collectionView
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell") as! MonthCell
cell.datesArray = []//dates based on indexPath
cell.collectionView.reloadData()
return cell
}
Or
Assign a reference to the table view cell index path in tableView cellForRowAt method
class MonthCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
var tableIndexPath:IndexPath?
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if let tableIndexPath {
// return value based on tableIndexPath
} else {
return 0
}
}
}
//cellForRowAt
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MonthCell") as! MonthCell
cell.tableIndexPath = indexPath
cell.collectionView.reloadData()
return cell
}