ios - 当滑回根 viewController 时，大导航栏背景会变得清晰

Question

我已经使用了 largeNavigationBar 并且在我滑回 Root View Controller 并且大型导航以令人讨厌的方式获得清晰颜色之前一切正常。这是代码:

func largeNavigationTitle() {
   
    self.navigationController?.view.backgroundColor = VVUtility.navigationBarColor()
    let productTitle = request?.product?.name
    self.navigationItem.title = "\(productTitle ?? " ")".localized()
    self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white, NSAttributedStringKey.font : VVUtility.normalFontWithPlusSize(increaseSize: -2.0)]
    
    if #available(iOS 11.0, *) {
        self.navigationController?.navigationBar.prefersLargeTitles = true
        self.navigationController?.navigationBar.backgroundColor = VVUtility.splashBackGroundColor()
        self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white, NSAttributedStringKey.font : VVUtility.normalFontWithPlusSize(increaseSize: 0.0)]
    } else {
        // Fallback on earlier versions
    }
    
}

我在 viewWillAppear 和 viewDidLoad 中调用了 largeNavigationTitle()

更新

这是两种状态的截图:

刷卡前:imgur.com/a/ZcSOrov

滑动时:imgur.com/a/DYeeot8

Answer 1

试试这个。它应该将 Root View Controller 的导航栏颜色设置为您想要的颜色:

func largeNavigationTitle() {

    self.navigationController?.view.backgroundColor = VVUtility.navigationBarColor()
   //add the two lines below
    self.navigationController?.navigationBar.barTintColor = VVUtility.navigationBarColor()
    self.navigationController?.navigationBar.isTranslucent = false

    let productTitle = request?.product?.name
    self.navigationItem.title = "\(productTitle ?? " ")".localized()
    self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white, NSAttributedStringKey.font : VVUtility.normalFontWithPlusSize(increaseSize: -2.0)]

    if #available(iOS 11.0, *) {
        self.navigationController?.navigationBar.prefersLargeTitles = true
        self.navigationController?.navigationBar.backgroundColor = VVUtility.splashBackGroundColor()
        self.navigationController?.navigationBar.largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor : UIColor.white, NSAttributedStringKey.font : VVUtility.normalFontWithPlusSize(increaseSize: 0.0)]
    } else {
        // Fallback on earlier versions
    }

}