Changing UIPageViewController own PageController regarding Color of Dots

Question

Hey I\'m using a UIPageViewController to control what page I am on and for scrolling. I know it\'s possible to show a Page Controller along with it by simply adding the followin

Answer 1

You can use UIAppearance to configure UIPageControl colors. This applies to UIPageControls in UIPageViewControllers too.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  UIPageControl *pageControl = [UIPageControl appearance];
  pageControl.pageIndicatorTintColor = [UIColor whiteColor];
  pageControl.currentPageIndicatorTintColor = [UIColor redColor];
}

Answer 2

UIPageControl conforms to UIAppearance protocol. The Apple Developper API Reference states about UIAppearance:

Use the UIAppearance protocol to get the appearance proxy for a class. You can customize the appearance of instances of a class by sending appearance modification messages to the class’s appearance proxy.

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Therefore, using Swift 2.2, you may set UIPageControl's pageIndicatorTintColor and currentPageIndicatorTintColor in a subclass of UINavigationController or in your AppDelegate class (for a more global approach).

CustomNavigationController.swift:

class CustomNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Set pageIndicatorTintColor and currentPageIndicatorTintColor
        // only for the following stack of UIViewControllers
        let pageControl = UIPageControl.appearance()
        pageControl.pageIndicatorTintColor = UIColor.blueColor()
        pageControl.currentPageIndicatorTintColor = UIColor.greenColor()
    }

}

AppDelegate.Swift:

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

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

        // Set pageIndicatorTintColor and currentPageIndicatorTintColor globally
        let pageControl = UIPageControl.appearance()
        pageControl.pageIndicatorTintColor = UIColor.blueColor()
        pageControl.currentPageIndicatorTintColor = UIColor.greenColor()

        return true
    }

}

Answer 3

If you would like to change the UIPageControl's colors for a specific UIPageViewController, you can use the following:

In Swift 3

let pageControl: UIPageControl = UIPageControl.appearance(whenContainedInInstancesOf: [MyPageViewController.self])
pageControl.pageIndicatorTintColor = UIColor.green
// ... any other changes to pageControl