Popover presentation controller - view has spacing around, doesn't fit full width - ios

Question

I am having an issue while displaying UITableViewController as a popover. The popover appears but its width in not full screen - there is some kind of margin on leading and trailing side. Check screenshot for more info:
This is the code I am using to setup and present controller:
let controller = UITableViewController()
controller.preferredContentSize = CGSize(width: self.view.bounds.width, height: self.popOverPresentationControllerHeight)
controller.modalPresentationStyle = .popover
controller.tableView.separatorStyle = .none
controller.tableView.allowsMultipleSelection = true
controller.tableView.dataSource = self.filterOptionsDataSource
controller.tableView.delegate = self
controller.tableView.isScrollEnabled = false
controller.tableView.register(FilterOptionCell.self, forCellReuseIdentifier: FilterOptionCell.identifier)
controller.tableView.register(UINib(nibName: FilterOptionCell.identifier, bundle: nil), forCellReuseIdentifier: FilterOptionCell.identifier)
controller.tableView.register(FilterConfirmCell.self, forCellReuseIdentifier: FilterConfirmCell.identifier)
controller.tableView.register(UINib(nibName: FilterConfirmCell.identifier, bundle: nil), forCellReuseIdentifier: FilterConfirmCell.identifier)
controller.popoverPresentationController?.popoverLayoutMargins = UIEdgeInsetsMake(0, 0, 0, 0)
controller.popoverPresentationController?.delegate = self
self.present(controller, animated: true, completion: {
UIView.animate(withDuration: 0.25) {
controller.view.superview?.layer.cornerRadius = 4
self.view.alpha = 0.4
}
})
controller.popoverPresentationController?.backgroundColor = UIColor.white
controller.popoverPresentationController?.sourceView = sender
controller.popoverPresentationController?.sourceRect = sender.bounds
There is also implemented adaptivePresentationStyle function but still, no difference:
func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
return UIModalPresentationStyle.none
}
ADDITIONAL QUESTION
Is there any way top arrow can be changed / modified? This arrow seems a bit too big for my use so is there a way to make it smaller or just replace it with custom one?
EDIT
After some investigating and printing out controller.view.superview?.frame I noticed its width is 20 points smaller than it should be which explains that space on both sides of the popup. But what's the way to get rid of it?

Answer 1

you can try this.
controller.popoverLayoutMargins = UIEdgeInsets(top: 0, left: 1, bottom: 0, right: 1)
Using this property, you can apply a margin from the end of the screen.
https://developer.apple.com/documentation/uikit/uipopovercontroller/1624657-popoverlayoutmargins?language=objc

Answer 2

You should try this code,
override open func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
var size = self.tableView.contentSize
size.width = 150.0 //Here, you can set the width.
self.preferredContentSize = size
}
and for brief understanding, how i create and present a popoverController.
#objc open static func instantiate() -> PopOverViewController {
let storyboardsBundle = getStoryboardsBundle() //Or Bundle.main
let storyboard:UIStoryboard = UIStoryboard(name: "PopOver", bundle: storyboardsBundle)
let popOverViewController:PopOverViewController = storyboard.instantiateViewController(withIdentifier: "PopOverViewController") as! PopOverViewController
popOverViewController.modalPresentationStyle = UIModalPresentationStyle.popover
popOverViewController.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection.up
// arrow color
popOverViewController.popoverPresentationController?.backgroundColor = UIColor.darkGray
return popOverViewController
}
To Present in a Specific ViewController,
let popover = PopOverViewController.instantiate()
popover.popoverPresentationController?.sourceView = self.underlyingTextView
popover.popoverPresentationController?.sourceRect = rect
popover.presentationController?.delegate = self
viewController.present(popover, animated: true, completion: nil)
//MARK: UIAdaptivePresentationControllerDelegate
public func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
return UIModalPresentationStyle.none
}
public func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
return UIModalPresentationStyle.none
}
In ViewDidLoad(), you can configure your tableView.