How to present view controller with one view controller alreadly be presented?

Question

Just like when you write new mail with iOS native mail app. or you ask new-question with stackoverflow iOS app.

Do you have any idea?

Answer 1

Try to present your new ViewController, with helper method

extension UIApplication {
  class func topViewController(base: UIViewController? = (UIApplication.sharedApplication().delegate as! AppDelegate).window?.rootViewController) -> UIViewController? {
    if let nav = base as? UINavigationController {
      return topViewController(base: nav.visibleViewController)
    }
    if let tab = base as? UITabBarController {
      if let selected = tab.selectedViewController {
        return topViewController(base: selected)
      }
    }
    if let presented = base?.presentedViewController {
      return topViewController(base: presented)
    }
    return base
  }
}

Call the above helper method from your ViewController like

UIApplication.topViewController().present(vc2, animated: true, completion: nil)