Scrolling issue with UITableViewController hosted in UICollectionViewCell - ios

Question

I have the following setup in my app:
UITabBarController
UINavigationController
UIViewController
The UIViewController has a UICollectionView with horizontal scrolling.
In the cells, I want to "host" a view from another ViewController. This works pretty well, but I have scrolling issues. The first UICollectionViewCell hosts a view that comes from a UITableViewController. I can scroll the UITableViewController but it does not really scroll to the end - it seems like the UITableViewController starts to bounce way too early.
When I used the UITableViewController as the Root View Controller, everything worked fine, so I don't think there is something wrong with this ViewController.
The height of the CollectionView is pretty small, I just wanted to show the "bouncing" behaviour.
Here is the code for the collectionView:
import Foundation
import UIKit
class FeedSplitViewController : UIViewController, Controllable
{
#IBOutlet weak var menuBar: MenuBar!
#IBOutlet weak var collectionView: UICollectionView!
private var currentIndex = 0
private var dragStart: CGFloat = 0.0
private var feedActivities: FeedViewController!
var controller: Controller!
override func viewDidLoad()
{
super.viewDidLoad()
self.initControls()
self.initMenuBar()
self.initCollectionView()
self.initActivitiesViewController()
}
fileprivate func initActivitiesViewController()
{
self.feedActivities = UIStoryboard.instantiate("Main", "feedActivities")
self.feedActivities.controller = self.controller
}
fileprivate func initControls()
{
self.navigationController?.navigationBar.setValue(false, forKey: "hidesShadow")
}
fileprivate func initMenuBar()
{
self.menuBar.showLine = true
self.menuBar.enlargeIndicator = true
self.menuBar.texts = [Resources.get("FEED_ACTIVITIES"), Resources.get("DASHBOARD")]
self.menuBar.selectionChanged =
{
index in
self.collectionView.scrollToItem(at: IndexPath(item: index, section: 0), at: UICollectionView.ScrollPosition.right, animated: true)
}
}
fileprivate func initCollectionView()
{
self.collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
let menuBarFrame = self.menuBar.frame.origin
let collectionView = self.collectionView.frame.origin
Swift.print(menuBarFrame)
Swift.print(collectionView)
}
}
extension FeedSplitViewController : UICollectionViewDelegate, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource
{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return 2
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
if indexPath.item == 0, let feedActivities = self.feedActivities
{
cell.contentView.addSubview(feedActivities.view)
}
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat
{
return 0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
{
return CGSize(width: self.view.bounds.width, height: self.view.bounds.height)
}
func scrollViewWillBeginDragging(_ scrollView: UIScrollView)
{
self.dragStart = scrollView.contentOffset.x
}
func scrollViewDidScroll(_ scrollView: UIScrollView)
{
let oldIndex = self.currentIndex
let page = scrollView.contentOffset.x / scrollView.frame.size.width
let currentPage = Int(round(page))
if oldIndex != currentPage
{
if Settings.useHapticFeedback
{
Utilities.haptic(.medium)
}
self.menuBar.selectedIndex = currentPage
}
self.currentIndex = currentPage
}
}
I have attached a small video: https://imgur.com/a/pj7l3Hd

Answer 1

I solved it by doing the following:
I no longer host the view of an ViewController directly in the
Every UICollectionView cell hosts an UITableView.
The UITableViewCell contains the data model that was previously implemented in the ViewController. The logic is still outside of the UITableViewCell.