Swift reusable cells with corrupted indexPath

I suppose this code is inside

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

I miss something in your code:

• you define item but is seems you never use it (at least in the posted code). What is the purpose of:

    let i = indexPath.item / numberOfSets
    let j = indexPath.item % numberOfSets
    let item = j * 5+i

• Could you show the code where you get the crash ?
• Could you show the complete code of the class (problem may be elsewhere).

extension WorkotuCreationCollectionTableViewCell: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout{
   
  func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return numberOfSets
  }
   
  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
  
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell

    print("Array:", Constants.Other.setsFromCollectionView)

    self.collectionView.isPrefetchingEnabled = false
     
    if Constants.view_specific_workout_from_homeScrren.posted_bool == true {
      cell.repsText.text = "0"
      cell.weightText.text = "0"
      Constants.view_specific_workout_from_homeScrren.posted_bool = false
    }
    cell.initialize(withDelegate: self)
     
    cell.layer.cornerRadius = 15.0
    cell.layer.borderWidth = 0.0
    cell.layer.shadowColor = UIColor.black.cgColor
    cell.layer.shadowOffset = CGSize(width: 0, height: 0)
    cell.layer.shadowRadius = 3.0
    cell.layer.shadowOpacity = 0.8
    cell.layer.masksToBounds = false //<-
    cell.layer.borderColor = UIColor.systemBlue.cgColor
     

    cell.setnumber.text = ("Set " + String(indexPath.row + 1))

    return cell
  }
   
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: 100, height: 110)
  }
   
  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    Constants.WorkoutSelectionVars.indexPath = indexPath
     Constants.WorkoutSelectionVars.indexPathRow = indexPath.row
  }
   
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return 3
  }

  // Search Bar Stuff Below!
  func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    filteredData = searchText.isEmpty ? WorkoutNameArray : WorkoutNameArray.filter({ (dat) -> Bool in
      dat.range(of: searchText, options: .caseInsensitive) != nil
    })
//    dropButton.dataSource = filteredData
//    dropButton.show()
  }
   
//  func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
//    searchBar.setShowsCancelButton(true, animated: true)
//    for ob: UIView in ((searchBar.subviews[0] )).subviews {
//      if let z = ob as? UIButton {
//        let btn: UIButton = z
//        btn.setTitleColor(UIColor.white, for: .normal)
//      }
//    }
//  }

  func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
    searchBar.showsCancelButton = false
    // ------------------------------------------- //
    // Trying some new stuff here - might not work //
    // ------------------------------------------- //
    let exerciseNumber_string = String(collectionView.tag)
    let exercise_chosen = searchBar.text ?? " "
    let full_concat = exercise_chosen + exerciseNumber_string
     
    let last1 = String(full_concat.suffix(1))
     
    for values in Constants.View_Specific_Workout.final_exercise_array {
      let temp = String(values.suffix(1))
      if last1 == temp {
        Constants.View_Specific_Workout.final_exercise_array.removeAll { $0 == values }
      }
      else {
        print("first element for the new exercisde")
      }
    }
     
    Constants.View_Specific_Workout.final_exercise_array.append(full_concat)
    print("exercise aname array is: ",Constants.View_Specific_Workout.final_exercise_array)
    print("the last number of the newly added joint is:", last1)
    // ------------------------------------------- //
    // ------------------------------------------- //
     
  }

  func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
    searchBar.resignFirstResponder()
    searchBar.text = ""
    filteredData = WorkoutNameArray
    //dropButton.hide()
  }
}

Thanks.

Where exactly does it crash ? What is the exact error message ?

I do not find the initialiser for cell.initialize(withDelegate:)

Deleted

Check the cells you dequeue are the cells defined in the CollectionView.

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell

Check in particular as! CollectionViewCell

Cells are not data store. You need to have a dataSource.

So, in

  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

you should populate the cell with data coming from a dataSource.

Add some code in WorkotuCreationCollectionTableViewCell:

    struct Content { 
        var reps: Int
        var weight: Int
    }

    var data : [Content] = [Content(reps: 1, weight: 0)] 

Add code in   func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

        cell.repsLabel.text = String(data[indexPath.row].reps)  
        cell.weightLabel.text = String(data[indexPath.row].weight)