UIKit_UICollectionViewDelegate.swift

@IBOutlet private weak var collectionView: UICollectionView!

private func registerNibs() {
        self.collectionView.register(UINib(nibName: "CollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "CollectionViewCell")
    }


// MARK: - Extension :: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout ::
extension MyProfileViewC: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

    // MARK: - UICollectionViewDelegate ::
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    }
    
    func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
    }

    // MARK: - UICollectionViewDataSource ::
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 10
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
      let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath as IndexPath) as! CollectionViewCell
      return cell
    }

    // MARK: - UICollectionViewDelegateFlowLayout ::
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
            return 15.0
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
            return 15.0
    }
    

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
        return UIEdgeInsets(top: 19.0, left: 19.0, bottom: 19.0, right: 19.0)
    }
        
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        
        var size = CGSize(width: 0, height: 0)
        
        size = CGSize(width: (DeviceWidth-19-15-19)/2, height: 191)
            
            /*
            let lay = collectionViewLayout as! UICollectionViewFlowLayout
            let widthPerItem = collectionView.frame.width / 2 - lay.minimumInteritemSpacing
            size =  CGSize(width:widthPerItem, height:191)
             */
        
        return size
    }
}