NavigationBar背景色在swift5中不起作用

Question

我在swift5中使用NavigationBar。NavigationBar背景颜色显示为黑色。这是我的图片

​

​

下面是我的代码：

    class ViewController: UIViewController {
        override func viewDidLoad() {
            super.viewDidLoad()
            
            self.navigationController?.navigationBar.tintColor = UIColor.red
            self.navigationController?.navigationBar.barTintColor = UIColor.green
            self.navigationController?.navigationBar.barTintColor = .red
            self.navigationItem.title = "ABC title"
            self.navigationController!.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
            self.navigationController?.navigationBar.isTranslucent = false
        }
    }

我的代码有什么问题？请帮帮我

Answer 1

这就是为什么在iOS 15 NavigationBars中使用scrollEdgeAppearance，如果你想使用旧的外观，你必须这样声明它：

override func viewDidLoad() {
        super.viewDidLoad()
        let appearance = UINavigationBarAppearance()
        appearance.configureWithOpaqueBackground()
        appearance.backgroundColor = .red
        appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
        self.navigationController?.navigationBar.standardAppearance = appearance;
        self.navigationController?.navigationBar.scrollEdgeAppearance = self.navigationController?.navigationBar.standardAppearance
        
        self.navigationItem.title = "ABC title"
    }

这就是结果：

​

​