I've made the launch screen the root view while my app makes a request to firebase and then reassign the root view once the request has been completed. Unfortunately when I do this my navigation bar disappears or is covered up by the new root view. When I run the simulator I can see the navigation bar briefly and then it get covered up by my TableViewController. How do I keep this from happening?
Here is my code from the AppDelegate where I make all of this happen:
var window: UIWindow?
let searchManager = SearchManager()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
makeRootViewLaunchScreen()
FirebaseApp.configure()
searchManager.getMosaicTitles { results in
self.searchManager.listOfMosaics = results
self.stopDisplayingLaunchScreen()
}
// Adds border to bottom of the nav bar
UINavigationBar.appearance().shadowImage = UIImage.imageWithColor(color: UIColor(red:0.00, green:0.87, blue:0.39, alpha:1.0))
// Override point for customization after application launch.
return true
}
func makeRootViewLaunchScreen() {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "LaunchScreen", bundle: nil)
let viewController = mainStoryboard.instantiateViewController(withIdentifier: "launchScreen")
UIApplication.shared.keyWindow?.rootViewController = viewController
}
func stopDisplayingLaunchScreen() {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = mainStoryboard.instantiateViewController(withIdentifier: "centralViewController") as? SearchResultsTableViewController
viewController?.searchManager = searchManager
UIApplication.shared.keyWindow?.rootViewController = viewController
UIApplication.shared.keyWindow?.rootViewController?.navigationController?.isNavigationBarHidden = false
}
As you can see I tried to use UIApplication.shared.keyWindow?.rootViewController?.navigationController?.isNavigationBarHidden = false to force the navigation bar to appear but it doesn't. My app still looks like this:
You are setting a UIViewController as your Root controller. What you want to do is set a UINavigationController as your Root controller.
Either create a new navigation controller in your storyboard and load that one instead of loading "centralViewController", or modify your function like this:
func stopDisplayingLaunchScreen() {
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "centralViewController") as? SearchResultsTableViewController {
viewController.searchManager = searchManager
// create a new UINavigationController
let newNavVC = UINavigationController()
// set the "root" VC of the NavVC to your SearchResultsTableViewController
newNavVC.setViewControllers([viewController], animated: false)
// use the new NavVC as the new rootViewController
UIApplication.shared.keyWindow?.rootViewController = newNavVC
UIApplication.shared.keyWindow?.rootViewController?.navigationController?.isNavigationBarHidden = false
}
}
Note: not tested, but this should get you on your way.
Edit: Another approach...
Instead of swapping the root controller of the key window, create a ViewController that indicates you are initializing / retrieving your data. That VC can be the "root" of a Navigation Controller.
Put your searchManager.getMosaicTitles function in that VC. When it has finished, replace the current "launch" controller in your Nav Controller with your TableVC. It will look something like this:
// note: searchManager will have to be a reference back to AppDelegate.searchManager
searchManager.getMosaicTitles { results in
self.searchManager.listOfMosaics = results
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "centralViewController") as? SearchResultsTableViewController {
viewController.searchManager = searchManager
// replace the current Nav VC stack with the new SearchResultsTableViewController
self.navigationController.setViewControllers([viewController], animated: false)
}
}
To prevent the lag between when the navigation bar controller appears and the tableView appears check out the following. Prevent navigation bar from disappearing without lag
Related
I have a UITabBarController and I want to show this screen and not the login screen if the user session is still active.
My UITabBarController has 3 ViewControllers and the problem is that I don't see the TabBar links in the bottom and I'm unable to navigate.
Without the following code everything works fine. I mean after login I can navigate.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FirebaseApp.configure()
if Auth.auth().currentUser != nil {
window = UIWindow(frame: UIScreen.main.bounds)
window?.makeKeyAndVisible()
window?.rootViewController = HomeTabBarController()
}
return true
}
I have also tried the following code to set the rootViewController but it's the same problem.
When I try to set one of the other view controllers as root (one of the children), the Tab Bar doesn't show at all
var rootView: MyRootViewController = MyRootViewController()
if let window = self.window{
window.rootViewController = rootView
}
What am I doing wrong here?
I was facing same issue and I came across your post, the problem with your code is that HomeTabBarController() is creating a whole new TabBarController so to fix it try the following approach I used.
if Auth.auth().currentUser != nil {
print("******************************User Present******************************")
self.window = UIWindow(frame: UIScreen.main.bounds)
let storyboard = UIStoryboard(name: "Main", bundle: nil)
// create view controllers from storyboard
// Interface Builder -> Identitiy Inspector -> Storyboard ID
// Set up the Tab Bar Controller to have two tabs
let tabBarController = storyboard.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
// Make the Tab Bar Controller the root view controller
window?.rootViewController = tabBarController
window?.makeKeyAndVisible()
}
Edit Make sure to add the Identifier to your TabBarController
// Interface Builder -> Identitiy Inspector -> Storyboard ID
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
//// this code changes the initial point of aap///////
window = UIWindow(frame: UIScreen.main.bounds)
let nav = UINavigationController()
let myview = SettingTabbar()
nav.viewControllers = [myview]
window?.rootViewController = nav
window?.makeKeyAndVisible()
return true
}
And Function SettingTabbar is:
func SettingTabbar()->(UITabBarController)
{
//Setting TabBar
let tabbar = UITabBarController()
//Designing Tabbar Item Images
let table = UITabBarItem(title: nil, image:UIImage(named: "002-list") , tag: 0)
let collection = UITabBarItem(title: nil, image: UIImage(named: "001-collect"), tag: 1)
let insert = UITabBarItem(title: nil, image: UIImage(named: "add"), tag: 2)
//Getting TabBar ViewControllers
let TableView = newViewController()
let CollectionView = PersonCollectionViewController()
let InsertRec = nextViewController()
//Setting ViewControllers on TabBar Items
TableView.tabBarItem = table
CollectionView.tabBarItem = collection
InsertRec.tabBarItem = insert
let controllers = [TableView,CollectionView,InsertRec]
tabbar.viewControllers = controllers
tabbar.viewControllers = controllers.map{UINavigationController(rootViewController: $0)}
//Setting Title
tabbar.navigationItem.title = "Person Record"
return tabbar
}
The problem is this line:
window?.rootViewController = HomeTabBarController()
That is the wrong HomeTabBarController. It is a totally new HomeTabBarController with no children. You need to fetch the HomeTabBarController that’s in the storyboard.
I finally found the solution: As #matt suggested I had to fetch the HomeTabBarController that’s in the storyboard.
window = UIWindow(frame: UIScreen.main.bounds)
let storyboard = UIStoryboard.init(name: "Main", bundle: nil)
// controller identifier sets up in storyboard utilities
// panel (on the right), it called Storyboard ID
let viewController = storyboard.instantiateViewController(withIdentifier: "HomeTabBarController") as! HomeTabBarController
self.window?.rootViewController = viewController
self.window?.makeKeyAndVisible()
window?.makeKeyAndVisible()
window?.rootViewController = viewController
For the purpose of this question, I'm showing a stripped down version of my view hierarchy. My app contains a UITabBarController as the base. Each tab's top most view controller is a navigation controller and it has view controllers embedded in each of them.
Let's take the first tab.
UITabBarController -> UINavigationController -> UITableViewController -> UIViewController
Let's say the UITableViewController instance is some sort of a list and the UIViewController is the detail view. When the user taps on an item from the list, it takes you to the detail view. And when that happens I have set the UIViewController's hidesBottomBarWhenPushed property to true so that the tabbar at the bottom would hide when the user is in the detail view.
My app receives push notifications. When tapped on them, it should open directly into the detail view. I can get it to navigate there. But the issue is the tabbar at the bottom is still visible!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
let storyboard = UIStoryboard(name: "Main", bundle: Bundle.main)
window = UIWindow(frame: UIScreen.main.bounds)
let tabBarController = storyboard.instantiateViewController(withIdentifier: "TabBarController") as! TabBarController
if openingFromPush {
let firstNavigationController = storyboard.instantiateViewController(withIdentifier: "FirstNavigationController") as! UINavigationController
let tableViewController = storyboard.instantiateViewController(withIdentifier: "TableViewController") as! TableViewController
let viewController = storyboard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
viewController.hidesBottomBarWhenPushed = true
firstNavigationController.viewControllers = [tableViewController, viewController]
tabBarController.viewControllers?[0] = firstNavigationController
// tabBarController.tabBar.isHidden = true
window?.rootViewController = tabBarController
} else {
window?.rootViewController = tabBarController
}
window?.makeKeyAndVisible()
return true
}
I set that same hidesBottomBarWhenPushed property to true in the when I instantiate the view controller but that doesn't seem to have any effect. I even tried straight up hiding the tabbar like this tabBarController.tabBar.isHidden = true but that doesn't do anything at all either.
I can't figure how how to resolve this. Any help would be appreciated.
I attached a sample Xcode project here as well if that helps.
You can use this code for pushing detail view controller:
if openingFromPush {
let viewController = storyboard.instantiateViewController(withIdentifier: "ViewController") as! ViewController
viewController.hidesBottomBarWhenPushed = true
if let nvc = tabBarController.viewControllers?[0] as? UINavigationController {
nvc.pushViewController(viewController, animated: false)
}
window?.rootViewController = tabBarController
}
You don't need to init navigation view controller and table view controller again its already inside tab bar controller
I am trying to push a view controller onto a navigation controller without designing a storyboard. Is this possible as I am new to Swift? I created my navigation controller in appdelegate.swift file:
let viewController: UIViewController = ViewController(nibName: nil, bundle: nil)
viewController.view.backgroundColor = UIColor.white
let navController: UINavigationController = UINavigationController(rootViewController: viewController)
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.backgroundColor = UIColor.darkGray
self.window?.rootViewController = navController
self.window!.makeKeyAndVisible()
And now in ViewController.swift file, when the user clicks the button below is the file when I try to add the signInController:
func SignIn(sender: UIButton!) {
print("Im, here")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "signInController") as! signInController
self.navigationController?.pushViewController(controller, animated: true)
}
Below is my Error:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x608000269600>) doesn't contain a view controller with identifier 'signInController''
Question:
Do I have to create a storyboard and go to the inspector Id to add the storyboard Id? But what if I wanted to accomplish this without creating a storyboard file?
If you are not using a storyboard then you shouldn't attempt to create your sign-in view controller from a storyboard. Change the code to create the view controller directly:
func SignIn(sender: UIButton!) {
print("I'm, here")
let controller = signInController()
self.navigationController?.pushViewController(controller, animated: true)
}
BTW - you need to rename everything to follow standard naming conventions. Classnames should start with uppercase letters. All method, variable, and parameters names should start with lowercase letters.
Well you want to create a viewController without using the storyboard and you're still trying to use the storyboard in your code.
Try something like this instead:
var window: UIWindow?
var navigationController: UINavigationController?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
self.window = UIWindow(frame: UIScreen.main.bounds)
// Override point for customization after application launch.
self.window!.backgroundColor = UIColor.white
self.window!.makeKeyAndVisible()
let myViewController: YourNewViewController = YourNewViewController()
self.navigationController = UINavigationController(rootViewController: myViewController!)
self.window!.rootViewController = self.navigationController
return true
}
I'm trying to want to present/push a VC embedded in a NavController from AppDelegate. I previously used this code but somehow it's not working anymore:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let VC = storyboard.instantiateViewControllerWithIdentifier("PendingRequest") as! PendingRequestVC
let navController = UINavigationController.self(rootViewController: VC)
let rootViewController = UIApplication.sharedApplication().keyWindow!.rootViewController
rootViewController!.presentViewController(navController, animated: false, completion: nil)
Other codes open my desired VC but not within a navigation pane. Any guidance would be appreciated.
Calling from AppDelegate after user interacts with push notification.
Edit:
I'm able to present the right VC by using this code:
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
if let viewController = mainStoryboard.instantiateViewControllerWithIdentifier("PendingNavController") as? UINavigationController {
if let yourViewController = viewController.topViewController as? PendingRequestVC {
//yourViewController.getRequestdata()
}
UIApplication.sharedApplication().keyWindow!.rootViewController = viewController;
}
But this code won't allow me to go back using the Close button on my NavBar.
My structure is as follow:
TabController -> NavController1 -> VC1 -> NavController1a -> VC1a
I'm trying to get to VC1a and be able to use the Closed button to go back to VC1
Add a UIButton in your presented ViewController's View. Following event will be performed by that button. You can dismiss your Navigation Controller this way
#IBAction func dismissViewController(sender: AnyObject) {
self.navigationController.dismissViewControllerAnimated(false, completion:nil);
}
UI flow:
AppDelegate
-->
LoginViewController (not in the storyboard)
-->
navigation controller (in the storyboard)
-->
PFQueryTableViewController (in the storyboard) named "OrdersVC"
This is the navigation controller with OrdersVC:
This is my AppDelegate:
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// ...
// initial VC
let VC = LoginViewController()
window = UIWindow(frame: UIScreen.mainScreen().bounds)
window!.rootViewController = VC
window!.makeKeyAndVisible()
return true
}
The above works fine. Then, from LoginViewController, I am then trying to display my storyboard's initial VC which is a navigation controller hosting a PFQueryTableViewController. Note that LoginViewController is not in the storyboard.
let destVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("OrdersVC") as! UITableViewController
// will throw "unexpectedly found nil"
let navController = UINavigationController(rootViewController: destVC)
navController.pushViewController(destVC, animated: true)
// will throw "unexpectedly found nil"
self.presentViewController(navController, animated: true, completion: nil)
Problem is that in my PFQueryTableViewController's viewDidLoad and viewDidAppear the following statement is always nil:
// navitaionController is nil
self.navigationController!.navigationBar.translucent = false
So how can I correctly instantiate PFQueryTableViewController inside its navigation controller?
You are instantiating the OrdersVC instead of instantiating the navigation controller into which it is embedded and which is the "initial" view controller of your storyboard. Use instantiateInitialViewController instead of using the identifier.
let nav = storyboard.instantiateInitialViewController()
self.window!.rootViewController = nav
The reason for the confusion is that you are "unlinking" the initial view controller from the storyboard with your login controller. You have to add the initial view controller back to the main window.