如何更改导航栏&返回按钮颜色 iOS 15 [英] How to change navigation bar & back button colour iOS 15

问题描述

我有 UIkit 项目，我想更改导航栏颜色和后退按钮颜色.它在以前的版本上运行良好.但不是在 iOS 15 中.我将以下代码放在 AppDelegate 上，它是更改标题颜色而不是后退按钮项目颜色.如何解决?

I have UIkit project and I want to change navigation bar colour and back button colour.It is working fine on previous versions. but not in iOS 15. I put following code on AppDelegate,It is change the Title colour but not back button item colour.How to fix it?

if #available(iOS 15.0, *) {
   let appearance = UINavigationBarAppearance()
   let navigationBar = UINavigationBar()
   appearance.configureWithOpaqueBackground()
   appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
   appearance.backgroundColor = .red
   navigationBar.tintColor = .white
   navigationBar.standardAppearance = appearance;
   UINavigationBar.appearance().scrollEdgeAppearance = appearance
}else{
   let navBarAppearnce = UINavigationBar.appearance()
   navBarAppearnce.tintColor = .white
   navBarAppearnce.barTintColor = .red
   navBarAppearnce.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
}

推荐答案

这些行完全没有意义:

let navigationBar = UINavigationBar()
navigationBar.tintColor = .white
navigationBar.standardAppearance = appearance

您正在创建导航栏，对其进行配置，然后将其丢弃.这对您的应用程序没有任何帮助.有意义地重写:

You are creating a navigation bar, configuring it, and throwing it away. That does nothing for your app. Rewrite meaningfully:

    let appearance = UINavigationBarAppearance()
    appearance.configureWithOpaqueBackground()
    appearance.titleTextAttributes = [.foregroundColor: UIColor.white]
    appearance.backgroundColor = .red
    let proxy = UINavigationBar.appearance()
    proxy.tintColor = .white
    proxy.standardAppearance = appearance
    proxy.scrollEdgeAppearance = appearance

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