I set up a sample project and I'm not getting the behavior you are. I'm thinking it's because we do things differently in setting up the UISplitViewController.
First, a major thanks to Matt Neuburg (@matt here on SO) for his two part article. (part one here) This provided me with some big changes to my code.
Basically, I no longer set my UISplitViewController to be the root view in my scenes. Instead, I do not touch SceneDelegate at all, but use the default ViewController:
let primaryVC = PrimaryVC()
let secondaryVC = SecondaryVC()
let compactVC = CompactVC()
override func viewDidLoad() {
super.viewDidLoad()
let split = UISplitViewController(style: .doubleColumn)
self.addChild(split)
self.view.addSubview(split.view)
split.view.frame = self.view.bounds
split.presentsWithGesture = true
split.preferredSplitBehavior = .tile
split.view.autoresizingMask = [.flexibleHeight, .flexibleWidth]
split.didMove(toParent: self)
split.setViewController(primaryVC, for: .primary)
split.setViewController(secondaryVC, for: .secondary)
split.setViewController(compactVC, for: .compact)
}
When I do this, I get a "sidebar.left" button and no "Back" button with Chevron. I'm using Xcode 13.1 and tried this with targets of iPadOS 14.0 and 15.1.
If you need to add/replace a bar button, what I do is:
var barBtnSidebarLeft = UIBarButtonItem(image: UIImage(systemName:"sidebar.left"), style: .plain, target: self, action: #selector(leftSidebarTapped))
navigationItem.leftBarButtonItem = barBtnSidebarLeft
But beware that if you do this, you will get two sidebar buttons! With regards to bar buttons, one more note - while the UISplitViewController provides a navigation bar by default for Primary and Secondary, it does not for Compact. (Frankly, I don't think it's good practice to have one when in compact size.)
Finally, read through the link I provided. It really gets into using UISplitViewControllerDelegate to help you pass along your scene state values properly. (I prefer calling it scene state instead of app state because iPads can have multiple app windows.)
EDIT
One last thought. IIRC you can do this:
- set
presentsWithGesture to `false
- place your own bar buttons as pleased in both view controllers
- manually (through the delegate functions?) open and close the Primary view controller
