UICollectionView Datasource methods do not get called - swift

Question

I am refactoring my ViewControllers and one of them contains a collectionView but now the DataSource is not getting called anymore.
My ViewController:
class CoinPageVC: UIViewController, DependencyInjectionVC, Storyboarded {
lazy var mainView: CoinPageV = {
let v = CoinPageV()
v.collectionView.delegate = self
return v
}()
var coin: Coin!
var selectedBase: String!
var viewContainer: [UIView]!
var collectionViewViewDataSource: CollectionViewCoinPageDatasource?
func injectDependencys(dependency: CoinPageDependency) {
self.coin = dependency.coin
self.selectedBase = dependency.base
self.viewContainer = dependency.views
}
override func viewDidLoad() {
super.viewDidLoad()
self.collectionViewViewDataSource = CollectionViewCoinPageDatasource(data: viewContainer)
self.mainView.collectionView.dataSource = self.collectionViewViewDataSource
self.mainView.collectionView.reloadData()
}
}
extension CoinPageVC: SetMainView {}
extension CoinPageVC: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let width:CGFloat = collectionView.bounds.width
let height:CGFloat = collectionView.bounds.height
// - (tabBarHeight + menuBar.frame.height + heightNavigationBarTop)
let output = Utility.shared.CGSizeMake(width, height)
return output
}
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
let index = Int(targetContentOffset.pointee.x / view.frame.width)
let indexPath = IndexPath(item: index, section: 0)
mainView.menuBar.collectionView.selectItem(at: indexPath, animated: true, scrollPosition: .centeredHorizontally)
}
}
My Datasource class:
class CollectionViewCoinPageDatasource: NSObject, UICollectionViewDataSource {
let data: [UIView]
init(data: [UIView]){
self.data = data
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 3
return data.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
//let outputCell: UICollectionViewCell
let row = indexPath.item
let outputCell = collectionView.dequeueReusableCell(withReuseIdentifier: Identifier.coinPageCollectionViewOverviewCell.rawValue, for:indexPath) as! CollectionViewCellView
outputCell.view = data[row]
return outputCell
}
}
My collectionView setup:
lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
let frame = CGRect(x: 0, y: 0, width: 0, height: 0)
let cv = UICollectionView(frame: frame, collectionViewLayout: layout)
cv.register(CollectionViewCellView.self, forCellWithReuseIdentifier: Identifier.coinPageCollectionViewOverviewCell.rawValue)
if let flowLayout = cv.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
cv.backgroundColor = .green
cv.isPagingEnabled = true
//cv.backgroundColor = .blue
return cv
}()
What did I miss?
I set up the datasource and also connect it to the datasource of the collectionView, but the methods do not get called.

Answer 1

lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
let frame = CGRect(x: 0, y: 0, width: 0, height: 0)
let cv = UICollectionView(frame: frame, collectionViewLayout: layout)
cv.register(CollectionViewCellView.self, forCellWithReuseIdentifier: Identifier.coinPageCollectionViewOverviewCell.rawValue)
if let flowLayout = cv.collectionViewLayout as? UICollectionViewFlowLayout {
flowLayout.scrollDirection = .horizontal
flowLayout.minimumLineSpacing = 0
}
cv.backgroundColor = .green
cv.isPagingEnabled = true
//cv.backgroundColor = .blue
cv.delegate = self
return cv
}()