NavigationBar改变颜色本身

Question

我有2个VC。 在我写这个代码到NavigationController外观但是当我从第二个VC返回到第一个时，我已经把所有东西都弄黑了......

第一个VC：

override func viewDidLoad() {
        super.viewDidLoad()

        self.navigationController?.navigationBar.isTranslucent = true
        self.navigationController?.navigationBar.barTintColor = UIColor.white
        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
        self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black]
        self.navigationController?.navigationBar.tintColor = UIColor.init(red:47/255.0, green:158/255.0, blue:249/255.0, alpha: 1.0)
}

第二个VC：

self.navigationController?.navigationBar.isTranslucent = false
        self.navigationController?.navigationBar.barTintColor = UIColor.black
        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
        self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
        self.navigationController?.navigationBar.tintColor = UIColor.white

那么为什么当我回到第一个VC时，它不会从viewDidLoad加载颜色？

Answer 1

由于您的第一个ViewController已加载，请将导航栏设置为override func viewWillAppear() { super. viewWillAppear() self.navigationController?.navigationBar.isTranslucent = true self.navigationController?.navigationBar.barTintColor = UIColor.white self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black] self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.black] self.navigationController?.navigationBar.tintColor = UIColor.init(red:47/255.0, green:158/255.0, blue:249/255.0, alpha: 1.0) }

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