UICollectionView ScrollTo Crashing - swift

Question

I am attempting to have my UICollectionView in my custom UIView, be able to scroll to a page when a button is pressed in the main VC. Unfortunately everytime I call the method to do it in the MainVC, it crashes, # to scrollToItem .
here is my MainVC.
let mainView = MainViewsHome()
In the ViewWillAppear:
/** Setting up the bottom half **/
mainView.frame = CGRect(x:self.view.frame.width * 0, y:self.view.frame.height / 6.2, width:self.view.frame.width,height:self.view.frame.height / 1.1925)
mainView.backgroundColor = UIColor.clear
self.view.addSubview(mainView)
&& My custom UIView
class MainViewsHome: UIView, UIGestureRecognizerDelegate, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
var cellId = "Cell"
var collectionView : UICollectionView!
override init(frame: CGRect) {
super.init(frame: CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height: UIScreen.main.bounds.height / 1.3))
/**Creation of the View **/
let flowLayout : UICollectionViewFlowLayout = UICollectionViewFlowLayout()
flowLayout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
flowLayout.scrollDirection = .horizontal
let collectionView = UICollectionView(frame: CGRect(x:self.frame.width * 0,y:self.frame.height * 0,width:self.frame.width,height: self.frame.height), collectionViewLayout: flowLayout)
collectionView.register(uploadGenreSelectionCVC.self, forCellWithReuseIdentifier: cellId)
collectionView.isPagingEnabled = true
collectionView.delegate = self
collectionView.dataSource = self
collectionView.backgroundColor = UIColor.purple
self.addSubview(collectionView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func moveToPage() {
print("we are moving to page")
self.collectionView.scrollToItem(at: 2 as IndexPath, at: UICollectionViewScrollPosition.right, animated: true)
}
&& Then in my MainVC I am calling: mainView.moveToPage() Where am I going wrong with my understanding?

Answer 1

Problem is with 2 as IndexPath, IndexPath is not Integer so you need to make the object of IndexPath using its init init(item:section:). and after that scroll collectionView to specific item this way.
func moveToPage() {
let indexPath = IndexPath(item: 2, section: 0) //Change section from 0 to other if you are having multiple sections
self.collectionView.scrollToItem(at: indexPath, at: .right, animated: true)
}
Note: CollectionView's items start at 0 index so if you want to scroll to 2nd item then make indexPath using IndexPath(item: 1, section: 0) because 2nd will scroll at 3rd cell of collectionView.