Cells on UITableView disappearing after scrolling or touching the table

Question

I am implementing a SwipeMenuViewController and when the user starts scrolling or tapping the cell disappears. I am not sure if it is due to the tableView being implemented not properly or the SwipeMenuViewController not being implemented properly.

Before swiping/touching the table, as you can see the table was loaded with the data

However. Once we start swiping or even touching the table, the previous cell disappears:

I have implemented the table view into a ViewController as follows

var currentUser: User!
var requests = [User]() 
var myTableView: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    myTableView = UITableView(frame: CGRect(x: 0, y: 0, width: tableSize.width, height: tableSize.height))
    myTableView.register(UINib(nibName: "FriendRequestTableViewCell", bundle: nil), forCellReuseIdentifier: "friendRequest")
    myTableView.dataSource = self
    myTableView.delegate = self
    //myTableView.separatorStyle = .none
    myTableView.rowHeight = 103
    myTableView.backgroundColor = Colours.flatColour.main.offWhite
    self.view.addSubview(myTableView)

}

The protocol methods:

// MARK: - Table view data source

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    if (self.requests.count == 0) {
        self.myTableView.setEmptyMessage("You are up to date!\nYou dont have any notifications 😄")
    } else {
        self.myTableView.restore()
    }

    return requests.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    let cell = Bundle.main.loadNibNamed("FriendRequestTableViewCell", owner: self, options: nil)?.first as! FriendRequestTableViewCell

    cell.currentUser = currentUser
    cell.requestFriendDelegate = self
    cell.user = requests[indexPath.row]

    return cell

}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 103
}

Does anyone have an idea as to where I have gone wrong, I am not sure if I am missing any code. The example of SwipeMenuViewController does not show this way of implementation. I have followed the Read me on implementing SwipeMenuView . I have two ViewControllers, one which holds the SwipeMenuView and one which holds the table for each tab which is the controller I think the issue is coming from. Thank you for any help

The notificationsViewController class:

class NotificationsViewController: UIViewController, SwipeMenuViewDelegate {

@IBOutlet weak var swipeMenuView: SwipeMenuView! {
    didSet {
        swipeMenuView.delegate = self
        swipeMenuView.dataSource = self
        var options: SwipeMenuViewOptions = .init()
        options.tabView.style = .flexible
        options.tabView.margin = 20.0
        options.tabView.additionView.backgroundColor = Colours.flatColour.yellow.lighter //UIColor.black//UIColor.customUnderlineColor
        options.tabView.itemView.textColor = Colours.flatColour.main.gray
        options.tabView.itemView.selectedTextColor = Colours.flatColour.yellow.lighter //UIColor.black//UIColor.customSelectedTextColor
        options.tabView.itemView.font = UIFont(name: "Biotif-Medium", size: 14)!

        swipeMenuView.reloadData(options: options)
    }
}

var tabTitles: [String] = ["All", "Friend Requests", "Items"]
var requests = [User]()

}

I reloadData again when populating the requests array and the array isnt empty. The data source methods:

extension NotificationsViewController: SwipeMenuViewDataSource {

//MARK - SwipeMenuViewDataSource
func numberOfPages(in swipeMenuView: SwipeMenuView) -> Int {
    return tabTitles.count
}

func swipeMenuView(_ swipeMenuView: SwipeMenuView, titleForPageAt index: Int) -> String {
    return tabTitles[index]
}

func swipeMenuView(_ swipeMenuView: SwipeMenuView, viewControllerForPageAt index: Int) -> UIViewController {
    let vc = NotificationsContentTable()
    vc.currentUser = currentUser
    vc.tableSize = swipeMenuView.bounds.size
    if index == 0 {
        vc.requests = requests
    }else if index == 1 {
        vc.requests = []
    }else if index == 2 {
        vc.requests = []
    }
    print("the requests are in = \(vc.requests)")
    return vc
}

}

Answer 1

I've figured out where I was going wrong. Before returning the viewController in viewControllerForPageAt , you must add that viewController as a child with addChild(viewController) .