UISplitView的MasterViewController和导航问题

我正在更新我现有的应用程序,以包含iPad的SplitView。

我使用的是UITabBar,但我的masterViewController出现了问题,因为它生成了一个“重复”导航栏,覆盖了所有masterViewController(选项卡)上的现有导航项目,包括搜索选项卡上的搜索栏。

我的代码是:

AppDelegate

class AppDelegate: UIResponder, UIApplicationDelegate, UISplitViewControllerDelegate {

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
{

    let splitViewController = self.window!.rootViewController as! UISplitViewController
    splitViewController.delegate = self
    splitViewController.preferredPrimaryColumnWidthFraction = 0.33
    splitViewController.minimumPrimaryColumnWidth = 375
    splitViewController.preferredDisplayMode = .allVisible

    return true
}

func splitViewController(_ splitViewController: UISplitViewController, collapseSecondary secondaryViewController:UIViewController, onto primaryViewController:UIViewController) -> Bool {
    return true
}

在AppDelegate中使用此选项的原因是,我看到了一个示例,在该示例中,将其放置在hear将允许我不需要在每个不同的主视图(每个选项卡)中使用代码。由于仍在使用第一个主视图,因此尚未对此进行测试。

主视图

override func viewDidLoad()

{

    self.extendedLayoutIncludesOpaqueBars = true

    self.navigationItem.hidesBackButton = true

    // 3D Touch
    if traitCollection.forceTouchCapability == .available {
        registerForPreviewing(with: self as UIViewControllerPreviewingDelegate, sourceView: view)
        ThreeDTouch = true
    }

    self.addSwitchVewButtonToNavigationBar()
    self.addCategoryButtonToNavigationBar()

}

func addSwitchVewButtonToNavigationBar() {
    let switchButton = UIButton(type: UIButtonType.custom)

    let editImage = UIImage(named: "CollectionButton")?.withRenderingMode(.alwaysTemplate)
    switchButton.setImage(editImage, for: .normal)
    switchButton.addTarget(self, action: #selector(SpeciesViewController.onSwitchView), for: UIControlEvents.touchUpInside)
    let switchButtonFinal = UIBarButtonItem(customView:switchButton)

    self.navigationItem.rightBarButtonItem = switchButtonFinal

}

@IBAction func onSwitchView(_ sender: UIBarButtonItem)
{
    AppDelegate.getAppState().isListViewSelected = false

    let speciesColletion = storyboard?.instantiateViewController(withIdentifier: Resource.SpeciesCollectionStoryboard) as! SpeciesCollectionViewController
    self.navigationController?.viewControllers = [speciesColletion]
}

最初,onSwitchViewButton是使用IB嵌入的,但不起作用。这与详图视图上的addFavorite使用的系统相同。