How do I add a section title in UICollectionView?

To add the custom label above every section in UICollectionView, please follow below steps

1. Enable the section header in UICollectionView

2. Add a new file of type UICollectionReusableView
3. In the storyboard change the class of section header in UICollectionViewCell to the newly added file of type UICollectionReusableView.
4. Add a label in section header of UICollectionViewCell in storyboard

5. Connect the label in the section header to the UICollectionReusableView file

   class SectionHeader: UICollectionReusableView {
       @IBOutlet weak var sectionHeaderlabel: UILabel!
   }
   

6. In the ViewController add the below code

   func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
   
       if let sectionHeader = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "SectionHeader", for: indexPath) as? SectionHeader{
           sectionHeader.sectionHeaderlabel.text = "Section \(indexPath.section)"
           return sectionHeader
       }
       return UICollectionReusableView()
   }
   

Here “SectionHeader” is name of the file added to type UICollectionReusableView