Я новичок в языке программирования Swift, у меня возникла проблема с отображением данных в ячейке CollectionView, хотя я правильно зарегистрировал ячейку с правильным идентификатором ячейки, а также получаю правильные данные в ответе API, но она отображает пустой UITableCell() , ниже приведен код viewController
import UIKit
import Combine
import PureLayout
class SchoolListCollectionViewController: UIViewController {
private let schoolsViewModel : SchoolsViewModel = SchoolsViewModel()
private var cancellables = Set()
private var collectionView: UICollectionView?
private struct Constants{
static let cellIdentifier: String = "schoolCell"
static let cellHeight: CGFloat = 100
static let sectionHeaderIdentifier: String = "sectionHeader"
static let sectionHeight: CGFloat = 50
}
override func viewDidLoad() {
super.viewDidLoad()
setupCollectionView()
setupBinders()
schoolsViewModel.getSchools()
let titleStr = "schools.title".localized()
}
private func setupCollectionView(){
let collectionViewLayout = UICollectionViewFlowLayout()
collectionViewLayout.itemSize = CGSize(width: view.frame.size.width, height: Constants.cellHeight)
// collectionViewLayout.headerReferenceSize = CGSize(width: view.frame.size.width, height: Constants.sectionHeight)
collectionViewLayout.scrollDirection = .vertical
collectionView = UICollectionView(frame: view.frame, collectionViewLayout: collectionViewLayout)
guard let collectionView = collectionView else {
return
}
view.addSubview(collectionView)
collectionView.autoPinEdgesToSuperviewEdges()
collectionView.backgroundColor = .white
collectionView.alwaysBounceVertical = true
//setup & customise flow layout
collectionView.register(SchoolCollectionViewCell.self, forCellWithReuseIdentifier: Constants.cellIdentifier)
collectionView.delegate = self
collectionView.dataSource = self
}
private func setupBinders(){
schoolsViewModel.$schools
.receive(on: RunLoop.main) //to run it on main thread
.sink{ [weak self] schools in
if let schools = schools,
!schools.isEmpty {
print("retrived \(schools.count) schools")
self?.collectionView?.reloadData()
}
}
.store(in: &cancellables)
schoolsViewModel.$error
.receive(on: RunLoop.main)
.sink{ [weak self] error in
if let error = error {
let alert = UIAlertController(title: "Error", message: "Could not retrieve schools: \(error.localizedDescription)", preferredStyle: .alert)
let action = UIAlertAction(title: "OK", style: .default)
alert.addAction(action)
self?.present(alert, animated: true)
}
}
.store(in: &cancellables)
}
}
extension SchoolListCollectionViewController: UICollectionViewDataSource{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return schoolsViewModel.schools!.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Constants.cellIdentifier, for: indexPath) as? SchoolCollectionViewCell else {
return UICollectionViewCell()
}
let school = schoolsViewModel.schools?[indexPath.item]
cell.populate(school!)
return cell
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
}
Подробнее здесь: https://stackoverflow.com/questions/786 ... nview-cell
