Updating a single cell in UICollectionView using Swift - ios

Question

I have a problem with updating a single cell when using a UICollectionView.
When I click on a label I want the label to change to the value of a different number which I can assign manually.
Code:
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
//return nameArray.count;
return 81;
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell=collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell;
switch(flattened[indexPath.item]){
case 1:
cell.labelText.text="1";
case 2:
cell.labelText.text="2";
case 3:
cell.labelText.text="3";
case 4:
cell.labelText.text="4";
case 5:
cell.labelText.text="5";
case 6:
cell.labelText.text="6";
case 7:
cell.labelText.text="7";
case 8:
cell.labelText.text="8";
case 9:
cell.labelText.text="9";
default:
cell.labelText.text="0";
//print(indexPath.item)
}
return cell;
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
}
When I run my code:

Answer 1

Firstly add those values in array
var array:[String] = ["1", "2" ,"3"] //and so on
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return array.count
}
and in cellforRow do like this
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell
cell.label.text = self.array[indexpath.row]
}
Use collection view didSelectItem to get a particular cell you will tap
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.array[indexpath.row] = "YOUR VALUE"
//self.collectionView.reloadData()
self.collectionView.reloadItems(at: [indexpath])
}
SUGGESTION: Try to learn about MVC, MVVM and modelling
and then try like this way: https://stackoverflow.com/a/49248513/5589073