CODEWITHSUNDEEP
iosswiftuicollectionviewuicollectionviewcell
lol0
lol0

Reputation: 1

UICollectionView not entering the cellForItemAt method if I only have 1 element in the collection

I have a UICollectionView inside my UITableViewCell and I want to display multiple Collection Cells. It works perfectly if the numberOfItemsInSection is more than 1. But if I only want to return 1 Item it enters the numberOfItemsInSection method and returns 1. So far so good, but the cellForRowAt method is not entered when I only have 1 Item. As long as I have 2 or more Items it works perfectly.

I am currently working with the storyboard but I also tried creating the cells programmatically but it still didn't work.

Table View Cell Class

class TaskTableViewCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {

    @IBOutlet weak var taskCollectionView: UICollectionView!

    @IBOutlet weak var customerLabel: UILabel!
    @IBOutlet weak var addressLabel: UILabel!

    @IBOutlet weak var containerView: UIView!
    @IBOutlet weak var colorView: UIView!
    @IBOutlet weak var shadowView: UIView!

    private var currentTask: Task!

    func initialize(task: Task) {
        currentTask = task

        taskCollectionView.delegate = self
        taskCollectionView.dataSource = self

        taskCollectionView.allowsSelection = false
        taskCollectionView.reloadData()
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return currentTask.tasks.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        // Not entering if numberOfItems is 1
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "SingleTaskCell", for: indexPath) as! SingleTaskCollectionViewCell

        cell.setUpViews()

        return cell
    }
}

CollectionViewCell Class

class SingleTaskCollectionViewCell: UICollectionViewCell {
    @IBOutlet weak var containerView: UIView!
    @IBOutlet weak var label: UILabel!

    func setUpViews() {
        containerView.layer.cornerRadius = SIZE.CORNER_RADIUS_1
    }
}

Task Class

class Task {
    var id: Int!
    var tasks: [String]
    var date: Date?
    var customer: Customer
    var isFinished: Bool
    var isAppointment: Bool

    init(id: Int? = nil, tasks: [String], date: String? = nil, formattedDate: Date? = nil, customer: Customer, isFinished: Bool = false, isAppointment: Bool = false) {
        if id != nil {
            self.id = id
        }
        self.tasks = tasks
        if formattedDate != nil {
            self.date = formattedDate!
        } else {
            if date != nil {
                let dateFormatterGet = DateFormatter()
                dateFormatterGet.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
                self.date = dateFormatterGet.date(from: date!)!
            } else {
                self.date = nil
            }
        }

        self.customer = customer
        self.isFinished = isFinished
        self.isAppointment = isAppointment
    }
}

Upvotes: 0

Views: 488

Answers (2)

HBK
HBK

Reputation: 5

CellforRow at:indexPath method won't be called if the size or position of the collectionView is changed before reload, make sure you're not doing that.

Upvotes: 0

lol0
lol0

Reputation: 1

EDIT: I fixed it. The mistake was with the autoresizing of the cells. Because of that if I had only 1 cell it wouldn't display in the visible region and that's why cellForItemAt wasn't called.

I fixed it by changing up some settings in the storyboard and calculate the size of the cells in the sizeForItemAt method.

Upvotes: 0

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