CODEWITHSUNDEEP
iosswiftuicollectionviewuistoryboardnslayoutconstraint
Kevin2566
Kevin2566

Reputation: 451

How to set constraints on a UICollectionViewCell?

I want my cell's width to be the same as the screen's width on every screen size. I can't set constraints in the storyboard since the option is greyed out, and setting them programmatically results in an error that says something like "Unable to activate constraint with anchors...because they have no common ancestor" even though I'm only setting the constraints to be the view's leading and trailing anchors.

The way the storyboard is setup now, the cell is at the desired width on iphone SE and that same width on the larger screen sizes.

Upvotes: 3

Views: 3081

Answers (2)

Sujit Nachan
Sujit Nachan

Reputation: 204

you can use delegate method 

viewcontroller:UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize.init(
            width: collectionView.bounds.height,
            height: collectionView.bounds.height
        )
    }

Upvotes: 3

nishad dangui
nishad dangui

Reputation: 1

This might help you to set the collectionView width same as the screen width. In your viewDidLoad() write this code

let height: CGFloat = 100.0 //Some constant
let width: CGFloat = self.view.frame.width

let spLayout = collectionView.collectionViewLayout as! UICollectionViewFlowLayout
spLayout.itemSize = CGSize(width: width, height: height)

Upvotes: 0

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