UIAction sheet not dismissing on bar button item click in iPad - ios

Question

I have programmatically created a navigation bar with a left and right bar button items. On clicking the right UIBarButtonItem the action sheet is presented,and then if i click left button,the action sheet persists. It does not dismiss. But if I tap anywhere else in the view controller the actionsheet is dismissed. The issue is only for iPad. This is the function called on the right bar button click.
func showActionButtons()
{
actionSheetController = UIAlertController(title: Constants.kPleaseSelect, message: nil, preferredStyle: .actionSheet)
let cancelActionButton = UIAlertAction(title: Constants.kCancel, style: .cancel) { action -> Void in
}
actionSheetController.addAction(cancelActionButton)
let cameraActionButton = UIAlertAction(title: "Camera", style: .default) { action -> Void in
//open camera
self.checkCamera()
}
actionSheetController.addAction(cameraActionButton)
let galleryActionButton = UIAlertAction(title: "Gallery", style: .default) { action -> Void in
//open gallery
self.checkGallery()
}
actionSheetController.addAction(galleryActionButton)
actionSheetController.popoverPresentationController?.barButtonItem = self.navigationItem.rightBarButtonItem
self.present(actionSheetController, animated: true, completion: nil)
}

Answer 1

//Set RightBar Item with image
private func setRightBarSelectAllItem() {
let image = UIImage(named: "ic_nav_select_all")?.withRenderingMode(.alwaysOriginal)
let backItem = UIBarButtonItem(image: image, style: .plain, target: self, action: #selector(onBtnSelectAll(_:)))
self.navigationItem.rightBarButtonItem = backItem
}
//IBAction
#IBAction func onBtnSelectAll(_ sender: UIBarButtonItem) {
showActionSheet(sender: sender)
}
//ActionSheet
private func showActionSheet(sender : UIBarButtonItem) {
let alt = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let select = UIAlertAction(title: "Select", style: .default) { (act) in
}
let selectAll = UIAlertAction(title: "Select All", style: .default) { (act) in
}
let deleteAll = UIAlertAction(title: "Delete All", style: .destructive) { (act) in
}
let cancel = UIAlertAction(title: "Cancel", style: .cancel) { (act) in
}
alt.addAction(select)
alt.addAction(selectAll)
alt.addAction(deleteAll)
alt.addAction(cancel)
alt.popoverPresentationController?.barButtonItem = sender
self.present(alt, animated: true, completion: nil)
}