Change Status Bar Background Color in Swift 3

With using Swift 3 and 4 you can use the code snippet on below. It finds the view from UIApplication using valueForKeyPath as set it's background color.

guard let statusBarView = UIApplication.shared.value(forKeyPath: "statusBarWindow.statusBar") as? UIView else {
        return
    }
statusBarView.backgroundColor = UIColor.red

Objective-C

UIView *statusBarView = [UIApplication.sharedApplication valueForKeyPath:@"statusBarWindow.statusBar"];
if (statusBarView != nil)
{
    statusBarView.backgroundColor = [UIColor redColor];
}

extension UIApplication {
    var statusBarView: UIView? {
        if responds(to: Selector(("statusBar"))) {
            return value(forKey: "statusBar") as? UIView
        }
        return nil
    }
}

UIApplication.shared.statusBarView?.backgroundColor = .red

Update for iOS 13

App called -statusBar or -statusBarWindow on UIApplication: this code must be changed as there's no longer a status bar or status bar window. Use the statusBarManager object on the window scene instead.

Refer to How to change the status bar background color and text color on iOS 13?

"Change" status bar background color:

let statusBarView = UIView(frame: UIApplication.shared.statusBarFrame)
let statusBarColor = UIColor(red: 32/255, green: 149/255, blue: 215/255, alpha: 1.0)
statusBarView.backgroundColor = statusBarColor
view.addSubview(statusBarView)

Change status bar text color:

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

Update: please note that the status bar frame will change when the view is rotated. You could update the created subview frame by:

• Using the autoresizing mask: statusBarView.autoresizingMask = [.flexibleWidth, .flexibleTopMargin]
• Observing NSNotification.Name.UIApplicationWillChangeStatusBarOrientation
• Or overriding viewWillLayoutSubviews()