How to update a UICollectionViewCell Label? - swift

Question

I am trying to change a text label in a UICollectionViewCell, but for some reason it just will not update. Any help would be aprreciated. Thanks!

Answer 1

You can use didSet to make your code a bit reactive.
class CollectionViewCell : UICollectionViewCell{
var text = "" {
didSet{
self.label.text = text
}
}
private var label : UILabel = {
let label = UILabel()
return label
}()
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class CollectionViewClass : UIViewController,UICollectionViewDelegate,UICollectionViewDataSource{
var collectionView = UICollectionView()
let id = "cell ID"
override func viewDidLoad() {
super.viewDidLoad()
collectionView = UICollectionView(frame: self.view.frame)
collectionView.register(CollectionViewCell.self, forCellWithReuseIdentifier: id)
collectionView.dataSource = self
collectionView.delegate = self
self.view.addSubview(collectionView)
collectionView.backgroundColor = .white
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: id, for: indexPath) as! CollectionViewCell
cell.text = "some text"
cell.backgroundColor = .red
return cell
}
}
In the above code, cell's text value is given everytime it's loaded. Whenever text is set, didset is called which updates the label value.