不知道为什么没有人提到这一点…但我所做的正是你在我的viewDidLoad中所做的…但它并没有起作用。然后我把我的代码放在viewWillAppear，它都工作了。

上面的解决方案是改变一个barbuttonItem。如果你想改变代码中每个navigationBar的颜色，那么遵循这个答案。

基本上，使用appearance()更改到类本身就像在应用程序中对该视图的所有实例进行全局更改。更多信息请参阅这里

Swift 5更新

如果你需要全局设置后退按钮颜色，你可以简单地使用:

UIBarButtonItem.appearance().tintColor = Asset.pureWhite.color

然后你不需要在每个视图控制器上设置后退按钮的背景色。如果你使用这个，你不能在其他视图控制器上设置返回按钮的颜色

BUT

如果您需要在视图控制器上设置后退按钮颜色或在另一个视图控制器上更改，请不要使用上述方法。你可以用:

let appearance = UINavigationBarAppearance()
appearance.titleTextAttributes = [.font:FontFamily.BatonTurbo.medium.font(size: 20),
                                  .foregroundColor: Asset.pureWhite.color] // Naviagtion Title attributes
appearance.backgroundColor = .red // Navigation bar background color

self.navigationItem.standardAppearance = appearance
self.navigationItem.scrollEdgeAppearance = appearance
self.navigationItem.compactAppearance = appearance

navigationController?.navigationBar.tintColor = .green // Back button color

让我们试试这段代码:

 func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    let navigationBarAppearace = UINavigationBar.appearance()
    navigationBarAppearace.tintColor = UIColor.whiteColor()  // Back buttons and such
    navigationBarAppearace.barTintColor = UIColor.purpleColor()  // Bar's background color
    navigationBarAppearace.titleTextAttributes = [NSForegroundColorAttributeName:UIColor.whiteColor()]  // Title's text color

    self.window?.backgroundColor = UIColor.whiteColor()
    return true
}

如果你试了很多次都没有成功，你可以试试:

UIBarButtonItem.appearance(whenContainedInInstancesOf: [UINavigationBar.self]).tintColor = .red

其实，我试了很多次，才发现这种方法行得通。

它将通过-(void)viewDidLoad中的这一行来解决:

self.navigationItem.backBarButtonItem.tintColor = UIColor.whiteColor;

对于Swift 2.0，要更改导航栏的色调颜色，标题文本和后退按钮的色调颜色更改，请使用AppDelegate.swift中的以下命令

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

  // Override point for customization after application launch.


    //Navigation bar tint color change

    UINavigationBar.appearance().barTintColor = UIColor(red: 42/255.0, green: 140/255.0, blue: 166/255.0, alpha: 0.5)

    //Back button tint color change

    UINavigationBar.appearance().barStyle = UIBarStyle.Default
    UINavigationBar.appearance().tintColor =  UIColor(red: 204/255.0, green: 255/255.0, blue: 204/255.0, alpha: 1)

    //Navigation Menu font tint color change

    UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName: UIColor(red: 204/255.0, green: 255/255.0, blue: 204/255.0, alpha: 1), NSFontAttributeName: UIFont(name: "OpenSans-Bold", size: 25)!]//UIColor(red: 42/255.0, green: 140/255.0, blue: 166/255.0, alpha: 1.0)

    UIApplication.sharedApplication().statusBarStyle = UIStatusBarStyle.LightContent


    return true
}