如何在 Swift 中以模态方式呈现导航控制器？

Question

我正在尝试以模态方式呈现导航控制器，问题是我的导航栏没有显示任何 baritems...有什么想法吗？这是我的代码。如果我向实际显示的导航栏添加背景颜色，但不是按钮...请帮忙！

if let navigationController = baseController as? UINavigationController {
    if UIScreen.main.traitCollection.userInterfaceIdiom == .phone {
        navigationController.present(webViewController, animated: true, completion: nil)
    } else {
        let webNavigationController = UINavigationController(rootViewController: webViewController)
        webNavigationController.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(cancelTapped))
        webNavigationController.isNavigationBarHidden = false
        webNavigationController.modalPresentationStyle = .overFullScreen
        navigationController.present(webNavigationController, animated: true, completion: nil)
    }
}

Answer 1

这一行是错误的：

webNavigationController.navigationItem.leftBarButtonItem = UIBarButtonItem(...

不是 webNavigationController 的 navigationItem 决定了栏按钮项目的存在，而是 webViewController。

如何在 Swift 中以模态方式呈现导航控制器？

How to modally present a navigation controller in Swift?

uiviewcontroller

uinavigationcontroller

modalviewcontroller

ios

swift