index out of range double array collection view - swift

Question

I fill cellTypes array
func fillCellTypes() {
cellTypes = []
cellTypes.append(Array(repeating: CellType.vanc, count: self.vancPhotos.count))
cellTypes.append(Array(repeating: CellType.calg, count: self.calgPhotos.count))
cellTypes.append(Array(repeating: CellType.mon, count: self.monPhotos.count))
cellTypes.append(Array(repeating: CellType.ott, count: self.ottPhotos.count))
cellTypes.append(Array(repeating: CellType.tor, count: self.torPhotos.count))
self.collectionView.reloadData()
print(cellTypes)
}
My CellType enum
enum CellType {
case vanc
case calg
case ott
case tor
case mon
}
var cellTypes: [[CellType]] = []
in config I fill all photos arrays
var vancPhotos: [PhotoModel] = []
var calgPhotos: [PhotoModel] = []
var ottPhotos: [PhotoModel] = []
var torPhotos: [PhotoModel] = []
var monPhotos: [PhotoModel] = []
var photos: [PhotoModel] = []
func configCollectionView() {
photoViewModel.getPhotos()
photos = photoViewModel.photos
vancPhotos = photoViewModel.vancPhotos
calgPhotos = photoViewModel.calgPhotos
ottPhotos = photoViewModel.ottPhotos
torPhotos = photoViewModel.torPhotos
monPhotos = photoViewModel.monPhotos
Inside cellForItemAt I get index out of range at switch.
extension WeatherDetailVC: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return cellTypes.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
switch cellTypes[indexPath.section][indexPath.row] {
case .tor: return configureTorontoCell(indexPath: indexPath)
...
}
}
func configureTorontoCell(indexPath: IndexPath) -> PhotoCollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: PhotoCollectionViewCell.identifier, for: indexPath) as? PhotoCollectionViewCell
cell?.setup(photoViewModel.torPhotos[indexPath.row])
return cell!
}
return cellTypes.count is 3 so my arrays are filled but cellforitem is some how wrong.

Answer 1

You would need to implement this differently you need multiple sections as your data consists of an array of arrays:
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
cellTypes[section].count
}
and add this function:
func numberOfSections(in collectionView: UICollectionView) -> Int {
cellTypes.count
}