Change status bar color dynamically in Swift 4

Question

I would like to change the status bar color between .lightContent and .default dynamically (since my background can change in the same ViewController).

Answer 1

Create a property with type UIStatusBarStyle and return the value in preferredStatusBarStyle

And you can change its value whenever you need and call setNeedsStatusBarAppearanceUpdate()

class ViewController: UIViewController {

    override var preferredStatusBarStyle: UIStatusBarStyle {
        return self.style
    }
    var style:UIStatusBarStyle = .default

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

    @IBAction func changeStyle(_ sender: UIButton) {
        if self.style == .lightContent {
            self.style = .default
        } else {
            self.style = .lightContent
        }
        setNeedsStatusBarAppearanceUpdate()
    }
}

override var preferredStatusBarStyle: UIStatusBarStyle { return self.style }

wont be called if you have embedded your view controller in a navigation controller You should change bar style of your navigation controller

self.navigationController?.navigationBar.barStyle = //newStyle