Call a UIViewController with NavigationController programmatically in SWIFT 2.x - ios

Question

I want to call a UIViewController with NavigationController designed in Storyboard programmatically when I select a dynamic shortcut.
I designed my UIViewController and its NavigationController in Main.storyboard and I put a storyboard ID (I called it MyUICtrlStoryID)
In order to create my dynamic shortcut I wrote the following code in the AppDelegate:
#available(iOS 9.0, *)
func application(application: UIApplication, performActionForShortcutItem shortcutItem: UIApplicationShortcutItem, completionHandler: Bool -> Void) {
let handledShortCutItem = shortcutItem.type // handleShortCutItem(shortcutItem)
if handledShortCutItem == "3DTouchShourtcutID"{
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
//FirstViewcontroller UI will be called as root UIView
let initialViewControlleripad : FirstViewController = storyboard.instantiateViewControllerWithIdentifier("FirstViewControllerID") as! FirstViewController
initialViewControlleripad.go2MySecondUI = true //set this check variable in order to launch my second UI View from the first one.
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.rootViewController = initialViewControlleripad
self.window?.makeKeyAndVisible()
}
}
in the viewWillAppear function of my FistViewController
if #available(iOS 9.0, *) {
let shortcutItem = UIApplicationShortcutItem(type: "3DTouchShortcutID",
localizedTitle: "This action",
localizedSubtitle: "action description",
icon: UIApplicationShortcutIcon(type: UIApplicationShortcutIconType.Add),
userInfo: nil)
UIApplication.sharedApplication().shortcutItems = [shortcutItem]
//check if FirstViewControler had to call the second UI
if go2MySecondUI == true {
self.go2MySecondUI = false
let newViewCtrl = self.storyboard?.instantiateViewControllerWithIdentifier("MyUICtrlStoryID") as? SecondViewController
// call second UI view
dispatch_async(dispatch_get_main_queue()) {
self.presentViewController(newViewCtrl!, animated: true, completion: nil)
}
// }
}
This code works fine: when I select, by 3d touch, my shortcut, my secondviewcontroller will be call and its UIView will be showed .. but without its navigation controller.
otherwise if I call my secondUIcontroller by a button designed in storyboard (with related segue callback) the secondUIView will be showed with navigation controller correctly..
What is wrong?

Answer 1

You need to embed your first view controller in a UINavigationController. So in the AppDelegate your code should be:
#available(iOS 9.0, *)
func application(application: UIApplication, performActionForShortcutItem shortcutItem: UIApplicationShortcutItem, completionHandler: Bool -> Void) {
let handledShortCutItem = shortcutItem.type // handleShortCutItem(shortcutItem)
if handledShortCutItem == "3DTouchShourtcutID"{
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
//FirstViewcontroller UI will be called as root UIView
let initialViewControlleripad : FirstViewController = storyboard.instantiateViewControllerWithIdentifier("FirstViewControllerID") as! FirstViewController
initialViewControlleripad.go2MySecondUI = true //set this check variable in order to launch my second UI View from the first one.
let navigationController = UINavigationController(rootViewController: initialViewControlleripad)
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
self.window?.rootViewController = navigationController
self.window?.makeKeyAndVisible()
}
}
Then in viewWillAppear of the FirstViewController you need to push the second view controller rather than present. So your code should read:
if #available(iOS 9.0, *) {
let shortcutItem = UIApplicationShortcutItem(type: "3DTouchShortcutID",
localizedTitle: "This action",
localizedSubtitle: "action description",
icon: UIApplicationShortcutIcon(type: UIApplicationShortcutIconType.Add),
userInfo: nil)
UIApplication.sharedApplication().shortcutItems = [shortcutItem]
//check if FirstViewControler had to call the second UI
if go2MySecondUI == true {
self.go2MySecondUI = false
let newViewCtrl = self.storyboard?.instantiateViewControllerWithIdentifier("MyUICtrlStoryID") as? SecondViewController
// call second UI view
self.navigationController?.pushViewController(newViewCtrl, animated: true)
// }
}