How can i set only one collection view for sizeForItemAt?

Question

I have ViewController where have two collectionView but for one I want isPagingEnabled for cell and for anther collectionView 3 item for full frame width. How can I do that ?

MenuCollectionView for paging : it working perfectly

 func setupMenuCollection(){        
            if let flowLayout = menuCollectionView?.collectionViewLayout as? UICollectionViewFlowLayout {
                flowLayout.scrollDirection = .horizontal
                flowLayout.minimumLineSpacing = 0
            }

            menuCollectionView?.backgroundColor = UIColor.white
            menuCollectionView?.contentInset = UIEdgeInsetsMake(50, 0, 0, 0)
            menuCollectionView?.scrollIndicatorInsets = UIEdgeInsetsMake(50, 0, 0, 0)

            menuCollectionView?.isPagingEnabled = true

        }

It is for manubarCollectionView : it is not working because here no else statement.

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        if manubarCollectionView == collectionView {

            return CGSize(width: view.frame.width / 3, height: manubarCollectionView.frame.height)
        }

    }

Where is your second collectionView? – Nirav D Dec 28 '16 at 11:29 — Nirav D, Dec 28 '16 at 11:29
menuCollectionView and manubarCollectionView – cristan lika Dec 28 '16 at 11:30 — cristan lika, Dec 28 '16 at 11:30

Nirav D · Accepted Answer · 2016-12-28T11:43:31.370

It's simple, for second collectionView cell size either add else block and return CGSize or directly return CGSize after if block.

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    if manubarCollectionView == collectionView {

        return CGSize(width: view.frame.width / 3, height: manubarCollectionView.frame.height)
    }
    else {
        //return cell size for menuCollectionView
        return collectionView.frame.size
    }
}

OR

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    if manubarCollectionView == collectionView {

        return CGSize(width: view.frame.width / 3, height: manubarCollectionView.frame.height)
    }

    //return cell size for menuCollectionView
    return collectionView.frame.size
}

Note: You need to put this type of condition in all dataSource and delegate methods of collectionView to differentiate two collectionView.

@cristanlika Check edited answer, to understand clearly and specify with more detail your above comment. — Nirav D, Dec 28 '16 at 11:44
@cristanlika Is speci.. written is your menuCollectionView's cell? — Nirav D, Dec 28 '16 at 11:52

score 1 · Answer 2 · edited May 23 '17 at 10:29

See Cristan ,

menuCollectionView?.contentInset = UIEdgeInsetsMake(50, 0, 0, 0)

above method is used for setting space between two cell.

And below method collectionViewLayout is used for setting cell Width and Height

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    if manubarCollectionView == collectionView {
        return CGSize(width: view.frame.width / 3, height: manubarCollectionView.frame.height)  
    }  
    else
    {  
        return CGSize(width: 100, height: 100)  
    }  
}

If you want to handle different cell for two collection view then check

how to use two CollectionView on same view controller

How can i set only one collection view for sizeForItemAt?

2 Answers2