更改 iOS 导航栏的颜色

问题描述

我正在尝试更改导航栏的颜色，但我发现只有当导航器是根时才不可能.

I'm trying to change the color of my navigator bar but I found that it's only impossible if the navigator is the root one.

我正在尝试这个:

self.navigationController?.navigationBar.translucent = true

self.navigationController!.navigationBar.barTintColor = UIColor.blueColor()

我所有的 Viewcontrollers 都与导航器控制器有关.然而，什么都没有改变.事实上，我尝试从情节提要中制作相同的东西，但只有当我在第一个导航器中时它才有效.

All my Viewcontrollers are related to navigator controllers. However nothing is changed. In fact I tried to make the same things from storyboard but it works only if I'm in the first navigator.

我试图阅读与此问题相关的所有内容，但一无所获

I tried to read everything related to this problem but found nothing

我可以像这样将任何项目添加到导航栏

I could add any item to the navigator bar like this

let HomeImage = UIImage(named: "home")!
    let Home : UIBarButtonItem = UIBarButtonItem(image: HomeImage,  style: .Plain, target: self, action: "home:")
    navigationItem.rightBarButtonItem = Home

推荐答案

其实我发现解决方案是在AppDelegate.siwft中使用:

In fact, i found that the solution was to use in the AppDelegate.siwft :

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.
    UINavigationBar.appearance().barTintColor = UIColor(red: 0, green: 0/255, blue: 205/255, alpha: 1)
    UINavigationBar.appearance().tintColor = UIColor.whiteColor()
    UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName:UIColor.whiteColor()]

    return true
}

然后在每个视图控制器中，我们需要另一种背景颜色或其他东西

and then in each view controller, that we need another background color or something else

1. segue 应该不同于show"

1. the segue should be different than "show"

使用函数viewWillAppear

 override func viewWillAppear(animated: Bool) {
     super.viewWillAppear(animated)
     self.navigationController?.navigationBar.barTintColor = UIColor.whiteColor()
     self.navigationController?.navigationBar.tintColor = UIColor.blueColor()
     self.navigationController!.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.blueColor()]
}

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