How do I hide the status bar in a Swift iOS app?

You really should implement prefersStatusBarHidden on your view controller(s):

Swift 3 and later

override var prefersStatusBarHidden: Bool {
    return true
}

Swift 3

In Info.plist set View controller-based status bar appearance to NO

And call UIApplication.shared.isStatusBarHidden = true

1. Go to Info.plist file
2. Hover on one of those lines and a (+) and (-) button will show up.
3. Click the plus button to add new key Type in start with capital V and automatically the first choice will be View controller-based status bar appearance.
4. Add that as the KEY.
5. Set the VALUE to "NO"
6. Go to you AppDelegate.swift

7. Add the code, inside the method

   func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject:AnyObject]?) -> Bool {
       application.statusBarHidden = true
       return true
   }
   

DONE! Run your app and no more status bar!