How to Change the status bar color using ios with swift on internet reachability?

Tested in Swift & iOS9

If you use Navigation Controllers, put this in your viewcontroller class:

override func viewDidLoad(){
    ...
    self.navigationController?.navigationBar.barStyle = .Black
}

Otherwise, override the preferredStatusBarStyle() in your UIViewController:

override func preferredStatusBarStyle() -> UIStatusBarStyle {
    return .LightContent
}

You could find more information here

In your Info.plist you need to set "View controller-based status bar appearance" to a boolean value.

If you set it to YES then you should override preferredStatusBarStyle function in each view controller.

If you set it to NO then you can set the style in AppDelegate using:

UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)

override func viewWillAppear(animated: Bool) {
    self.navigationController?.navigationBarHidden =  true

    //Status bar style and visibility
    UIApplication.sharedApplication().statusBarHidden = false
    UIApplication.sharedApplication().statusBarStyle = .LightContent

    //Change status bar color
    let statusBar: UIView = UIApplication.sharedApplication().valueForKey("statusBar") as! UIView
    if statusBar.respondsToSelector("setBackgroundColor:") {
        statusBar.backgroundColor = UIColor.redColor()
    }

}