UICollectionViewController Error in Swift 3.0: must be initialized with a non-nil layout parameter

Question

I\'m new to iOS development. I\'ve been learning Swift, and today, I tried using UICollectionViewController.

My code is as follows:

 class ViewContro         


        

Answer 1

Just change the order like below one :

let layout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 10, bottom: 10, right: 10)
layout.itemSize = CGSize(width: 90, height: 120)
colView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
self.view.addSubview(colView)
colView.delegate   = self
colView.dataSource = self
colView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")
colView.backgroundColor = UIColor.white