UITableView separator color not changing - ios

Question

I'm trying to create a drop-down menu. In this drop-down menu, I have a UIView which the user taps on to drop down a UITableView. In the process of creating it, I tried to change the separator color to clear. However, it's not working. I have tried settings it different colors all to no avail, but for some reason when I try to set its edge inset it works. Can someone help me out?
private var selectedBackgroundColor : UIColor = UIColor(red: 131/255, green: 43/255, blue: 205/255, alpha: 1.0)
private var unSelectedBackgroundColor : UIColor = UIColor(red: 178/255, green: 90/255, blue: 253/255, alpha: 1.0)
override init(frame: CGRect) {
super.init(frame: frame)
self.commonInitializer()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
self.commonInitializer()
}
private func commonInitializer() {
self.backgroundColor = self.unSelectedBackgroundColor
self.layer.cornerRadius = self.bounds.height/2
let shadowColor = UIColor(red: 0xC8, green: 0xC6, blue: 0xC6)
self.layer.applySketchShadow(color: shadowColor, alpha: 0.5, x: 0, y: 2, blur: 5, spread: 0)
self.itemTableView.frame = CGRect(x: 0, y: 0, width: 0, height: 0)
self.itemTableView.translatesAutoresizingMaskIntoConstraints = false
self.itemTableView.delegate = self
self.itemTableView.dataSource = self
self.itemTableView.showsVerticalScrollIndicator = false
self.itemTableView.separatorColor = UIColor.clear
self.itemTableView.backgroundColor = self.unSelectedBackgroundColor
}
override func didMoveToSuperview() {
self.superview?.addSubview(itemTableView)
self.superview?.bringSubviewToFront(itemTableView)
//Drop down table view constraints
self.itemTableView.topAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
self.itemTableView.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
self.itemTableView.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
self.tableViewHeight = self.itemTableView.heightAnchor.constraint(equalToConstant: 0)
}
/**
Changes the drop down button view and table view to the selected color
*/
private func changeToSelectedBackgroundColor() {
self.backgroundColor = self.selectedBackgroundColor
self.itemTableView.backgroundColor = self.selectedBackgroundColor
}
/**
Changes only the drop down button view to the unselected color. Changes the table view to white
*/
private func changeToUnSelectedBackgroundColor() {
self.backgroundColor = self.unSelectedBackgroundColor
self.itemTableView.backgroundColor = UIColor.white
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel?.text = self.items[indexPath.row]
cell.backgroundColor = UIColor.clear
cell.textLabel?.textColor = UIColor.white
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.itemTableView.deselectRow(at: indexPath, animated: true)
self.retractDropDownList()
}
#objc func buttonTapped() {
self.flashLabel()
if isExtended {
self.retractDropDownList()
} else {
self.expandDropDownList()
}
}
private func expandDropDownList() {
isExtended = true
self.delegate?.dropDownViewExtended()
NSLayoutConstraint.deactivate([self.tableViewHeight])
self.tableViewHeight.constant = 150.0
NSLayoutConstraint.activate([
self.tableViewHeight])
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.5, options: .curveEaseInOut, animations: {
self.changeToSelectedBackgroundColor()
self.itemTableView.layoutIfNeeded()
self.layer.cornerRadius = 0.0
self.itemTableView.center.y += self.itemTableView.frame.height/2
}, completion: nil)
}
private func retractDropDownList() {
isExtended = false
self.delegate?.dropDownViewRetracted()
NSLayoutConstraint.deactivate([self.tableViewHeight])
self.tableViewHeight.constant = 0.0
NSLayoutConstraint.activate([
self.tableViewHeight])
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.5, options: .curveEaseInOut, animations: {
self.changeToUnSelectedBackgroundColor()
self.itemTableView.center.y -= self.itemTableView.frame.height/2
self.itemTableView.layoutIfNeeded()
self.layer.cornerRadius = self.bounds.height/2
}, completion: nil)
}
}