App delegate code:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let myViewController = storyboard.instantiateViewControllerWithIdentifier("MyViewController") as UIViewController
if self.window != nil {
self.window!.rootViewController = myViewController
}
When I load app without this code everything is fine.
But if I run with this code view is loaded but navigation and tab bar are missing.
What am I missing here?
I am using storyboard.
This is code that work:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainRootController = storyboard.instantiateViewControllerWithIdentifier("MainViewController") as UIViewController
if self.window != nil {
let navigationController:UINavigationController = storyboard.instantiateInitialViewController() as UINavigationController
navigationController.viewControllers = [mainRootController]
self.window!.rootViewController = navigationController
}
return true
Before adding root view controller you must be allocate memory for navigation controller and then navigation controller take as a root view controller .
UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:yourViewController];
[[UINavigationBar appearance]setTintColor:[UIColor whiteColor]];
self.window.rootViewController = navigationController;
Related
I am trying to show a specific viewcontroller, inside my UITabBarController by using the viewcontrollers storyboard id.
I can only get the viewcontroller to be shown without the UITabBarController.
How do I also show the UITabBarController?
I have tried this:
let identifier = "stats_view"
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: identifier)
window?.rootViewController = vc
Which gave me the problem listed above.
try the following code.
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
if let myTabBar = self.window.rootViewController as? UITabBarController { // Getting Tab Bar
myTabBar.selectedIndex = 2 //Selecting tab here
return true
}
}
You should set selectedIndex of tabBarController to view specific viewController which are embedded in tabBarController. Use following code.
self.tabBarController?.selectedIndex = 1
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
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
I'm trying to instantiate a viewcontroller that has a navigation controller embedded in it from the AppDelegate. Here's what my code looks like:
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
let dm = DefaultsManager.sharedManager
if dm.rememberMe == true {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("VolunteerVC")
self.window!.rootViewController = vc
self.window?.makeKeyAndVisible()
}
the right viewcontroller is instantiated but the navigation controller that was embedded in it is now missing. Any idea how to instantiate it with the nav controller still connected?
Figured it out, give the nav controller a name under storyboard ID in the storyboard and for the line:
let vc = storyboard.instantiateViewControllerWithIdentifier("VolunteerVC")
replace the name of the viewcontroller with the name you gave the navigation controller.
I want to make slide out menu. For this I have to create UINavigationViewController which will controlMenuViewController(Table View) and ProfileViewController(Content View)
I want to set UINavigationViewController like a rootViewController, for this I wrote this code in AppDelegate.swift
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
let nav1 = UINavigationController()
let mainView = MainViewController(menuViewController: nil, contentViewController: nil) //ViewController = Name of your controller
nav1.viewControllers = [mainView]
self.window?.rootViewController = nav1
self.window?.makeKeyAndVisible()
return true
}
MainViewController is my UINavigationViewController.
But here I have error
nil is not compatible with expected argument type 'UIViewController'
What I should do?
You pass nil here: MainViewController(menuViewController: nil, contentViewController: nil) instead of some view controllers. That's probably the reason it doesn't compile.
You embed your MainViewController instance, which is already UINavigationController, into another one UINavigationController. That looks wrong too.
Here is an example:
LoginViewController *loginController = [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:#"loginController"]; //or the homeController
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:loginController];
self.window.rootViewController = navController;`
This error means you can't set menuViewController and contentViewController to nil, they are not optional