Question

我发现setNavigationBarHidden之后setViewControllers无法正常工作？

这是我的代码：

HomeNavController.swift：

class HomeNavController: UINavigationController {

    weak var tabBar: HomeTabBar!

    var tab: HomeTab = .match {
        didSet {
            switch self.tab {
            case .match:
                self.setViewControllers([MatchViewController()], animated: false)
            case .moments:
                self.setViewControllers([MomentsViewController()], animated: false)
            case .myPosts:
                self.setViewControllers([PostsViewController()], animated: false)
            }
        }
    }
}

MatchViewController.swift

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.setNavigationBarHidden(true, animated: false)
}

当我第一次切换到MatchViewController实例时，它运行良好，但在我使用func HomeNavController更改setViewControllers实例的viewControllers之后，它不起作用。< / p>

是UINavigationController的错误吗？

Answer 1

也许尝试设置属性，这在我的情况下起作用：

    let navigationBarAppearance = UINavigationBar.appearance()
    let transparentColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0);
    // Sets the translucent background color
    navigationBarAppearance.backgroundColor = transparentColor
    navigationBarAppearance.titleTextAttributes = [NSForegroundColorAttributeName:transparentColor]
    // Hides the border
    navigationBarAppearance.shadowImage = UIImage()
    navigationBarAppearance.setBackgroundImage(UIImage(), for: .default)

setNavigationBarHidden在setViewControllers之后不起作用

1 个答案: