Overriding Margin between UITableView and Custom Cell - swift

Question

I have a UITableView created in code as such:
lazy var tableView:UITableView = {
let tv = UITableView()
tv.delegate = self
tv.dataSource = self
tv.remembersLastFocusedIndexPath = false
tv.translatesAutoresizingMaskIntoConstraints = false
return tv
}
I am constraining it to the parent view:
private func setup() {
tableView.register(LiveTVCell.self, forCellReuseIdentifier: "cell")
self.view.addSubview(tableView)
tableView.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 20).isActive = true
tableView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor, constant: 0).isActive = true
tableView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor, constant: 0).isActive = true
tableView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor, constant: 0).isActive = true
}
The cusom cell here has nothing but a red background. As rendered, the cell is showing 90 points from the left side of the screen where the tableview starts. I have tried to use layoutMargins as well as contentInset to no effect. If I do something like: print(self.tableView.layoutMargins) it shows that the left margin is indeed 90.
The only way I have been able to overcome this behavior is to add the following: tv.directionalLayoutMargins = NSDirectionalEdgeInsets(top: 0, leading: -180, bottom: 0, trailing: -90) I loath this solution as it relies on magic numbers.
Net, how can I remove this 90 points of left margin without the above hack fix?
More code has been asked for so I am including the tableview delegate and datasource functions below:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.liveArray.first?.shows.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! LiveTVCell
if !self.fetchedRows.contains(indexPath.row) {
self.fetchedRows.append(indexPath.row)
self.spinner.start()
MediaFeedController.retrieveShows(showIDs: liveArray.first!.shows,forSection:indexPath.row) { [unowned self](row) in
self.spinner.stop()
guard row != nil else {return}
UIView.performWithoutAnimation {
self.tableView.reloadRows(at: [IndexPath(row: row!, section: 0)], with: .none)
}
}
}
cell.showID = liveArray.first!.shows[indexPath.row]
//print(self.tableView.layoutMargins)
return cell
}
func tableView(_ tableView: UITableView, canFocusRowAt indexPath: IndexPath) -> Bool {
return false
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 70
}
Here is the tableviewcell. Keep in mind that the issue occurs if I remove all of this from the tableviewcell and just set a background color:
import UIKit
class LiveTVCell: UITableViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
var showID:Int! {
didSet {
setup()
}
}
private var collectionView: UICollectionView!
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
override func layoutSubviews() {
super.layoutSubviews()
}
func setup() {
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
collectionView = UICollectionView(frame: self.bounds, collectionViewLayout: layout)
collectionView.backgroundColor = UIColor(named: "collectionView")
collectionView.delegate = self
collectionView.dataSource = self
collectionView.remembersLastFocusedIndexPath = true
collectionView.register(ChannelCVCell.self, forCellWithReuseIdentifier: "channelCell")
collectionView.register(ProgramCVCell.self, forCellWithReuseIdentifier: "programCell")
self.addSubview(collectionView)
collectionView.leadingAnchor.constraint(equalTo: self.leadingAnchor).isActive = true
collectionView.trailingAnchor.constraint(equalTo: self.trailingAnchor).isActive = true
collectionView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
collectionView.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
}
// MARK: - Collectionview Delegate & Datasource
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 2
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.section == 0 {
let channelCell = collectionView.dequeueReusableCell(withReuseIdentifier: "channelCell", for: indexPath) as! ChannelCVCell
channelCell.showID = showID
return channelCell
} else {
let programCell = collectionView.dequeueReusableCell(withReuseIdentifier: "programCell", for: indexPath) as! ProgramCVCell
programCell.showID = showID
return programCell
}
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if indexPath.section == 0 {
return CGSize(width: 177, height: 70)
} else {
return CGSize(width: collectionView.frame.size.width, height: 70)
}
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
if section == 0 {
return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
} else {
return UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 0)
}
}
// MARK: - CollectionView Focus Delegates
func collectionView(_ collectionView: UICollectionView, didUpdateFocusIn context: UICollectionViewFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
//guard let index = context.nextFocusedIndexPath?.row else {return}
}
override func prepareForReuse() {
self.collectionView.removeFromSuperview()
}
}
Update:
You can completely remove the custom cell and have nothing in cellForRowAt and return a generic UITableViewCell and the table's layout margin on the left is 90. In fact the second you add the table to the subview and anchor it, it's 90.