NavigationBar和TabBar背景颜色始终为灰色

编程问答 2022-08-11

问题描述

我的TabBar和navigationBar始终是灰色的，尝试了我发现的所有StackOverflow解决方案，但均无效果。他们总是保持灰色。
这是我的AppDelegate代码，MenuViewController是TabBarViewController。

self.window = UIWindow(frame: UIScreen.main.bounds)
        
        let menuVC = MenuViewController()
        let navigationController = UINavigationController(rootViewController: menuVC)
        
        navigationController.navigationBar.tintColor = .white
        navigationController.navigationBar.barTintColor = .red
        
        window = UIWindow(frame: UIScreen.main.bounds)
        window?.rootViewController = UINavigationController(rootViewController: MainViewController())
        window?.makeKeyAndVisible()

解决方法

看一下这段代码：

window?.rootViewController = UINavigationController(rootViewController: MainViewController())

您正在将rootViewController设置为UINavigationController的另一个实例MainViewController作为rootViewController。

如果要为样式化的导航控制器提供MenuViewController实例，则应将其设置为Windows根视图控制器：

let menuVC = MenuViewController()
let navigationController = UINavigationController(rootViewController: menuVC)
        
navigationController.navigationBar.tintColor = .white
navigationController.navigationBar.barTintColor = .red
        
window = UIWindow(frame: UIScreen.main.bounds)
window?.rootViewController = navigationController
window?.makeKeyAndVisible()
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