iOS导航栏颜色，任务栏颜色

    AppDelegate中添加如下代码：

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        UINavigationBar.appearance().barTintColor = UIColor(red: 20/255, green: 155/255, blue: 213/255, alpha: 0.9)
        UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor(),NSFontAttributeName: UIFont(name: "Heiti SC", size: 20.0)!]
        UIApplication.sharedApplication().statusBarStyle = .LightContent
        return true
    }