How to set Status Bar Style in Swift 3

Question

I'm using Xcode 8.0 beta 4.

In previous version, UIViewController have method to set the status bar style

public func preferredStatusBarStyle() -> UIStatusBarStyle

However, I found it changed to a "Get ONLY varaiable" in Swift 3.

public var preferredStatusBarStyle: UIStatusBarStyle { get } 

How can provide the style to use in my UIViewController?

Answer 1

Here is Apple Guidelines/Instruction about status bar style change.

If you want to set status bar style, application level then set UIViewControllerBasedStatusBarAppearance to NO in your .plist file. And in your appdelegate > didFinishLaunchingWithOptions add following ine (programatically you can do it from app delegate).

Objective C

[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

Swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    application.statusBarStyle = .lightContent
    return true
}

---

if you wan to set status bar style, at view controller level then follow these steps:

1. Set the UIViewControllerBasedStatusBarAppearance to YES in the .plist file, if you need to set status bar style at UIViewController level only.

2. In the viewDidLoad add function - setNeedsStatusBarAppearanceUpdate

3. override preferredStatusBarStyle in your view controller.

Objective C

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setNeedsStatusBarAppearanceUpdate];
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

Swift

override func viewDidLoad() {
    super.viewDidLoad()
    self.setNeedsStatusBarAppearanceUpdate()
}

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

Set value of .plist according to status bar style setup level.

Answer 2

This is the preferred method for iOS 7 and higher

In your application's Info.plist, set "View controller-based status bar appearance" to YES.

Override preferredStatusBarStyle in each of your view controllers. For example:

override var preferredStatusBarStyle: UIStatusBarStyle {     
      return .lightContent
}

If you have preferredStatusBarStyle returning a different preferred status bar style based on something that changes inside of your view controller (for example, whether the scroll position or whether a displayed image is dark), then you will want to call setNeedsStatusBarAppearanceUpdate() when that state changes.

If you use a navigation controller and you want the preferred status bar style of each view controller to be used, see https://stackoverflow.com/a/41026726/1589422.

iOS before version 7, deprecated method

Apple has deprecated this, so it will be removed in the future. Use the above method so that you don't have to rewrite it when the next iOS version is released.

If your application will support In your application's Info.plist, set "View controller-based status bar appearance" to NO.

In appDelegate.swift, the didFinishLaunchingWithOptions function, add:

UIApplication.shared.statusBarStyle = .lightContent

Answer 3

If you want to change the status bar style any time after the view has appeared you can use this:

• In file info.list add row: View controller-based status bar appearance and set it to YES

  var viewIsDark = Bool()
  
  func makeViewDark() {
  
      viewIsDark = true
      setNeedsStatusBarAppearanceUpdate()
  }
  
  func makeViewLight() {
  
      viewIsDark = false
      setNeedsStatusBarAppearanceUpdate()
  }
  
  override var preferredStatusBarStyle: UIStatusBarStyle {
  
      if viewIsDark {
          return .lightContent 
      } else {
          return .default 
      } 
  }
  

Answer 4

If you want to change the statusBar's color to white, for all of the views contained in a UINavigationController, add this inside AppDelegate:

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

    UINavigationBar.appearance().barStyle = .blackOpaque
    return true
}

This code:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

does not work for UIViewControllers contained in a UINavigationController, because the compiler looks for the statusBarStyle of the UINavigationController, not for the statusBarStyle of the ViewControllers contained by it.

Hope this helps those who haven't succeeded with the accepted answer!

Answer 5

First step you need add a row with key: View controller-based status bar appearance and value NO to Info.plist file. After that, add 2 functions in your controller to specific only that controller will effect:

override func viewWillAppear(_ animated: Bool) {
       super.viewWillAppear(animated)
       UIApplication.shared.statusBarStyle = .lightContent
}

override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        UIApplication.shared.statusBarStyle = .default    
}

Answer 6

For objective C just add this line in your application didFinishLaunch method

UIApplication.sharedApplication.statusBarStyle = UIStatusBarStyleLightContent;