How to presentViewController embedded in UITabBarController and UINavigationBarController - ios

Question

When using 3D Touch Shortcuts from the home screen I am trying to segue to different view controller.
The application is embedded within a UITabBarController and each tab root controller is a UINavigationController.
Here is how I attempted handling the shortcuts to load the view controller for each shortcut.
private func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) {
if let rootViewController = window?.rootViewController, let shortcutItemType = ShortcutItemType(shortcutItem: shortcutItem) {
let sb = UIStoryboard(name: "main", bundle: nil)
let helloVC = sb.instantiateViewControllerWithIdentifier("HelloVC") as! HelloViewController
let goodbyeVC = sb.instantiateViewControllerWithIdentifier("GoodbyeVC") as! GoodbyeViewController
switch shortcutItemType {
case .Hello:
rootViewController.presentViewController(helloVC, animated: true, completion: nil)
break
case .Goodbye:
rootViewController.presentViewController(goodbyeVC, animated: true, completion: nil)
break
}
}
}
With this code the shortcuts only open the application to the initial view controller and not to the helloVC and goodbyeVC controllers which are in different tabs.
I am presuming this is because the ViewControllers I am trying to load are embedded within a UINavigationController as well as embedded within the UITabBarController.
How can I presentViewController which is embedded within the UITabBarController and UINavigationController ?
UPDATE
I am unsure if the following works as I have not got a iPhone 6S with me atm. But I have changed the code to the following, hopefully this will load the selected tab index when the 3D Touch Action is performed. From there it should post a notification to the view controller to perform a segue.
private func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) {
if let rootViewController = window?.rootViewController, let shortcutItemType = ShortcutItemType(shortcutItem: shortcutItem) {
let tababarController = rootViewController as! UITabBarController
switch shortcutItemType {
case .Hello:
tababarController.selectedIndex = 1
NSNotificationCenter.defaultCenter().postNotificationName("performsegueHello", object: nil)
break
case .Goodbye:
tababarController.selectedIndex = 4
NSNotificationCenter.defaultCenter().postNotificationName("performsegueGoodbye", object: nil)
break
}
}
}

Answer 1

Please try the following code. I think you are not reaching the navigation controller of tab bar.you can do this by :
let insideNvc = tvc?.selectedViewController as? UINavigationController
Now, here is your navigation controller you can present or push anything on it.
private func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) {
let nvc = self.window?.rootViewController as? UINavigationController
let tvc = nvc?.topViewController as? TabBarController
let insideNvc = tvc?.selectedViewController as? UINavigationController
if let shortcutItemType = ShortcutItemType(shortcutItem: shortcutItem) {
let sb = UIStoryboard(name: "main", bundle: nil)
let helloVC = sb.instantiateViewControllerWithIdentifier("HelloVC") as! HelloViewController
let goodbyeVC = sb.instantiateViewControllerWithIdentifier("GoodbyeVC") as! GoodbyeViewController
switch shortcutItemType {
case .Hello:
insideNvc?.presentViewController(helloVC, animated: true, completion: nil)
break
case .Goodbye:
insideNvc?.presentViewController(goodbyeVC, animated: true, completion: nil)
break
}
}
}