As We know we, Often, we assign a collection view’s data source to its view controller. But here the problem is that we have only one view controller and many collection views.
As I have taken number of ‘Sections’ inside table view. so following is the Solution to distinguish between a collection view on the first section , and one on the second , third and fourth…
So here is a way to store which table view cell a collection view is in.
- TableView : I have taken multiple sections And Only One Row.
- Collection View : I have Only one Section And Multiple Items.
In ViewController.swift Use Following –
- Extension :
extension ViewController: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 3
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: “UploadCell”, for: indexPath) as! UploadCollectionViewCell
//Code
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
print(“Collection view at row \(collectionView.tag) selected index path \(indexPath)”)
}
}
In TableViewCell.swift Use Following –
- Extension :
extension TableViewCell {
func setCollectionViewDataSourceDelegate<D: UICollectionViewDataSource & UICollectionViewDelegate>(_ dataSourceDelegate: D, forRow row: Int) {
collectionView.delegate = dataSourceDelegate
collectionView.dataSource = dataSourceDelegate
collectionView.tag = row
collectionView.setContentOffset(collectionView.contentOffset, animated:false) // Stops collection view if it was scrolling.
collectionView.reloadData()
}
var collectionViewOffset: CGFloat {
set { collectionView.contentOffset.x = newValue }
get { return collectionView.contentOffset.x }
}
}
******* One IMP addition in ‘willDisplay’ method of tableView in ViewController.swift *******
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let tableViewCell = cell else { return }
tableViewCell.setCollectionViewDataSourceDelegate(self, forRow: indexPath.section)
}
Thanks.
