无法设置iOS 11大标题条颜色

Question

在将导航条设置为透明后，我在恢复iOS 11大标题的bartint颜色方面出现了问题。

复制步骤：

1. 将导航栏、背景图像和阴影设置为空UIImage()。
2. 导航栏变得透明。
3. 将导航栏、背景图像和阴影设置为零，并设置条形色调颜色。
4. 大标题导航栏变为白色；如果向下滚动(存在旧导航条)，则可以看到条形图颜色仅适用于旧风格的导航栏。

Tried:

*将导航背景颜色和状态颜色设置为条形色调，是的，它改变了，但是没有半透明的视觉效果，就像我们设置的条色一样。

有没有人像我一样面对同样的问题，并能用任何解决方案或解决办法来解决这个问题？

原始

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在浏览了一个具有透明导航的页面之后返回了

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FYI，我还应用自定义导航控制器将透明颜色设置为默认颜色，

class CustomNavigationController: UINavigationController {

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

override func pushViewController(_ viewController: UIViewController, animated: Bool) {

    super.pushViewController(viewController, animated: animated)
   self.setDefaultNavigationBar()

}

override func popViewController(animated: Bool) -> UIViewController? {
    self.setDefaultNavigationBar()
    return super.popViewController(animated: animated)

}

override func popToViewController(_ viewController: UIViewController, animated: Bool) -> [UIViewController]? {
    self.setDefaultNavigationBar()
    return super.popToViewController(viewController, animated: animated)

}

override func popToRootViewController(animated: Bool) -> [UIViewController]? {
    self.setDefaultNavigationBar()
    return super.popToRootViewController(animated: animated)
}


func setDefaultNavigationBar() {

    let navigationBarColor = UIColor(hexString: "#00b5baff")!
    self.navigationBar.setBackgroundImage(nil, for: .default)
    self.navigationBar.shadowImage = nil
    //self.navigationController?.navigationBar.backgroundColor = UIColor.clear
    //self.navigationController?.navigationBar.tintColor = UIColor.clear
    self.navigationBar.barTintColor = navigationBarColor

}

/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destinationViewController.
    // Pass the selected object to the new view controller.
}
*/

}

Answer 1

尝试将transparent.png图像作为背景图像来实现透明性。那应该管用。如果这不起作用，试着使用下面的代码来更新大标题颜色。

self.navigationController?.navigationBar.largeTitleTextAttributes = 
[NSAttributedStringKey.foregroundColor: UIColor.blue, 
 NSAttributedStringKey.font: UIFont(name: fontName, size: 30) ?? 
                             UIFont.systemFont(ofSize: 30)]

希望这能有所帮助！

Answer 2

不确定这是否对任何人有帮助，但当我在选择“更喜欢的大标题”后导航背景颜色变成白色时，这才是对我有用的：

    let appearance = UINavigationBarAppearance()
    appearance.backgroundColor = FlatBlue()
    appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
    navigationBar.standardAppearance = appearance
    navigationBar.scrollEdgeAppearance = appearance