I've setup an App that has a Tab Bar controller as a screen in a navigation controller using the storyboard. I can navigate to it fine, but when I start drilling down through screens in one of the tabs, the tab bar disappears. If I navigate back to the first screen the tab bar is supposed to be on, the tab bar will reappear, but I would prefer if it was visible on the child screens. Is this possible or do the two view controllers just not play well together?
The tab bar controller always needs to be the root view controller. You can't put it INSIDE a navigation controller.
Even if it was possible, it wouldn't be good user interaction. What is it you're trying to do exactly (functional)?
I think what you want is to place the navigation controller as the first tab inside the tab bar controller instead. (not the other way around like you're describing)
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
MenuViewController * menuViewController=[[[MenuViewController alloc] initWithNibName:#"MenuViewController_iPhone" bundle:nil] autorelease];
menuViewController.hidesBottomBarWhenPushed=YES;
//menuViewController You can have your option here
UINavigationController * navigationController;
UINavigationController * navigationController2;
UINavigationController * navigationController3;
viewController1 = [[[FirstViewController alloc] initWithNibName:#"FirstViewController_iPhone" bundle:nil] autorelease];
viewController2 = [[[SecondViewController alloc] initWithNibName:#"SecondViewController_iPhone" bundle:nil] autorelease];
navigationController=[[UINavigationController alloc] initWithRootViewController:viewController1];
navigationController2=[[UINavigationController alloc] initWithRootViewController:viewController2];
navigationController3=[[UINavigationController alloc] initWithRootViewController:menuViewController];
UITabBarController * tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:menuViewController,navigationControllerFirst, viewController2, nil];
//self.tabBarController.tabBar.tintColor=[UIColor orangeColor];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
return true;
}
Related
I used tabbed application template to start my new iPhone project.
I will have 4 tabs.
And I want to nave navigation bar at the top.
So I added this in AppDelegate:
UIViewController *viewController1 = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:nil];
UIViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
UINavigationController *navigationcontroller = [[UINavigationController alloc] initWithRootViewController:viewController1];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:navigationcontroller, viewController2, nil];
And this added navigation bar only at the top of the first ViewController (first tab).
What I want is to add navigation bar for the whole application not just in one view.
This will enable me to jump from one view to another and back across tabs.
So what is the best way to programmatically make one navigation bar for all tab views?
UPDATE
Basically my main question is should I have one navigation bar for all views or each tab should have its own navigation bar?
What is best practice in "iDevelopers" world.
I'd rather have the self.window.rootViewController be a navigationController, and afterwards, just push your tabBarController or
NSMutableArray *viewControllers = [[NSMutableArray alloc] init];
// create someViewController
[viewControllers addObject:someView];
// create someViewController2
[viewControllers addObject:someView2];
UITabBarController *tabController = [[UITabBarController alloc] init];
[tabController setViewControllers:viewControllers];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:tabController]
self.window.rootViewController = navController;
If you want to have navigation bars on each controller, you should to have UINavigationController on each tab of your UITabBarController
Look an answer to this question.
You you need navigation bar you have to add UINavigationController as you did for each view controller in tab bar. So self.tabBarController.viewControllers will have all navigation controllers.
Its not good idea to switch across tabs without user intervention.
I have 3 tabs and main navigation controller. I implements with code:
UIViewController *monitorController = [[[MonitorController alloc] initWithNibName:#"MonitorController" bundle:nil] autorelease];
UIViewController *dashboardController = [[[DashboardController alloc] initWithNibName:#"DashboardController" bundle:nil] autorelease];
UIViewController *settingsController = [[[SettingsController alloc] initWithNibName:#"SettingsController" bundle:nil] autorelease];
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:monitorController, dashboardController, settingsController, nil];
self.navigationController = [[[UINavigationController alloc] initWithRootViewController:self.tabBarController] autorelease];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
I want to change navigation title when I select another tap, but no variant (see below) not working (there are no any title at navigation controller):
self.title = DASHBOARD_TITLE;
self.navigationController.title = DASHBOARD_TITLE;
How I can resolve this problem?
The UINavigationController will display the title of the UIViewController it's currently displaying, that is why you are not able to set it directly.
You may try to change the title on your UITabBarController, but I'm not sure the navigation controller will update it's title after it first appeared on screen.
But, Do you really need that Architecture?
Usually the UITabBarController is the root viewController and if you need UINavigationControllers they are place inside the Tab that need to have navigation capability.
It was design to be use that way.
Unlike other view controllers, a tab bar interface should never be installed as a child of another view controller.
Quoted from UITabBarController Class Reference
Sorry I misread your question, what you have to do is to implement -tabBar:didSelectItem: from UITabBarDelegate protocol, and then change the title according to the pressed tab.
Or in the ViewWillAppear method of your controllers set the title, the way you were doing it
Hi guys I am working on an application.Where there is a home screen with 5 buttons.On the click of every button i want to open the screen with tabbar with 5 view controllers.I mean when you click on the button the tabbar is opened.And there are back button on the tab bar view as well .On clicking the back button i want to pop back to the home screen and vice versa.
How to do that guys.Any tutorial ,links,sample code would be appreciated.
Thanks a lot to all
Tabbar controller in a navigation stack is complicated. Since each tab controller can have also navigation controller itself.
Have a WindowManager class. It should own both
- FirstViewController and
- TabbarController
All components and the UITabbarControllers themselves should be instantiated in the WindowManager class.
Its init may have code like this, make similar for two tabbarcontrollers.
self.tabBarController = [[UITabBarController alloc] init];
self.controllers = [[NSMutableArray alloc] init];
// initialize the view controllers and navigation controllers for the tab bar
self.friendsVC = [[FriendsVC alloc] initWithNibName:#"FriendsView" bundle:nil];
UINavigationController *friendsNVC = [[UINavigationController alloc] initWithRootViewController: friendsVC];
friendsNVC.navigationBar.barStyle = UIBarStyleBlack;
[controllers addObject:friendsNVC];
[friendsNVC release];
self.paymentsVC = [[PaymentsVC alloc] initWithNibName:#"PaymentsView" bundle:nil];
UINavigationController *paymentsNVC = [[UINavigationController alloc] initWithRootViewController: paymentsVC];
paymentsNVC.navigationBar.barStyle = UIBarStyleBlack;
[controllers addObject:paymentsNVC];
[paymentsNVC release];
tabBarController.viewControllers = controllers;
tabBarController.selectedIndex = 0;
tabBarController.delegate = self;
self.view = tabBarController.view;
In the WindowManager, you can have two methods like,
[WindowManager showViewController] and
[WindowManager showTabbarController].
- showViewController {
//Initiate View controller and use [self.window addSubView:vc.view];
}
- showTabbarController {
// initiate the tabbar manager
}
You can have a "back" button on top of your first tabbar controller left side, to call the
[WindowManager showViewController];
I currently have a UINavigationController in my app delegate where I push a ViewController on to login. If the login is successful I want to then create a UITabBarController with a Navigation Controller as the first Tab whose root controller is a UIViewController that I am creating.
The RootViewController of my first UINavigationController is actually acting as a delegate to the logincontroller so if a user logs in correctly it calls a method in my RootViewController which is where I would then like to push a UITabBarController onto the stack. Here is my code:
UITabBarController *tbController = [[UITabBarController alloc] init];
FileBrowserViewController *fileController = [[FileBrowserViewController alloc] init];
fileController.pathToFileDB = pathToDBUnzipped;
fileController.parentId = #"0";
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:fileController];
NSMutableArray *aViewControllersArray = [[NSMutableArray alloc] initWithCapacity:2];
[aViewControllersArray addObject:navController];
[navController release];
[tbController setViewControllers:aViewControllersArray];
[self.navigationController pushViewController:tbController animated:YES];
[tbController release];
Now, it is all working fine. Except 2 things. Here is the screen shot:
1) I can't see any uitabbar items. How do i set an image and the text for each tab?
2) I don't want that top black bar. I only want 1 bar ontop with the undo button. How do I remove the additional bar?
I always follow this approach when I have both a UINavigationController and a UITabbarController:
You need to start with a view based application. And then create a UITabbarController in your appDelegate file.
Appdelegate.h
UITabBarController *tabBarController;
// set properties
Appdelegate.m
// Synthesize
tabBarController = [[UITabBarController alloc] init];
tabBarController.delegate=self;
// Adding Search,Nearby,Map,AboutUs,Favorites Tabs to tabBarController
Search * search = [[Search alloc] init];
UINavigationController *searchNav = [[UINavigationController alloc] initWithRootViewController:search];
Nearby* nearby = [[Nearby alloc] init];
UINavigationController *nearbyNav = [[UINavigationController alloc] initWithRootViewController:nearby];
Map* map = [[Map alloc] init];
UINavigationController *mapNav = [[UINavigationController alloc] initWithRootViewController:map];
AboutUs* aboutUs = [[AboutUs alloc] init];
UINavigationController *aboutUsNav = [[UINavigationController alloc] initWithRootViewController:aboutUs];
Favorites* favorites = [[Favorites alloc] init];
UINavigationController *favoritesNav = [[UINavigationController alloc] initWithRootViewController:favorites];
NSArray* controllers = [NSArray arrayWithObjects:searchNav,nearbyNav,mapNav,aboutUsNav,favoritesNav, nil];
tabBarController.viewControllers = controllers;
[window addSubview:tabBarController.view];
You can accordingly manage in which tab you want to place navigation controller or only a view controller.
Then in each of the view controllers mentioned above you need to implement
- (id)init {}
in which you can set Tab name and image.
I always follow this approach and it never fails. The tabs are always visible. You can make changes according to your code.
to hide the above black bar use -
[self.navigationController setNavigationBarHidden:TRUE];
to set tab bar item use -
for system item -
UITabBarItem *firstItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:0];
for custom item -
UITabBarItem *firstItem = [[UITabBarItem alloc] initWithTitle:#"title" image:[UIImage imageNamed:#""] tag:0];
[navController setTabBarItem:firstItem];
Here is a good video on how to combine Tab Bar, Navigation Bar, and/or Table Views.
http://www.youtube.com/watch?v=LBnPfAtswgw
If you don't want you sign-up screen to have a Tab Bar controller, then you will have to present it as a modal view (since the tab bar is your root view controller). This can be done through the presentModalViewController:animated: method. You can find info about that at:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/ModalViewControllers/ModalViewControllers.html%23//apple_ref/doc/uid/TP40007457-CH111-SW1
I hope that helps. Let me know if you have any other questions!
Cheers, Evan.
hi friend that top bar is status bar . You can set.statusbar hidden = yes;
or change it from plist , when you open your plist there is a option to hide it,
I have created a UItabbarcontroller and 2 views with UITableViews just using code (no IB stuff) and I want to now add a navigation bar at the top that will include add and edit buttons, however I seem to be tripping up and blowing my app up or adding navgation controller to a 3rd tab only.
Here is my main code for adding the tab bar and switching views
FYI - I am using XCode4
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.mainTabBar = [[UITabBarController alloc] init];
// create the 2 views
tableViewController* vc1 = [[tableViewController alloc] init];
tableViewController2* vc2 = [[tableViewController2 alloc] init];
// put them in an array
NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2, nil];
// for the tab bar
mainTabBar.viewControllers = controllers;
// Add the tab bar controller's current view as a subview of the window
[self.window addSubview:self.mainTabBar.view];
// Override point for customization after application launch.
[self.window makeKeyAndVisible];
return YES;
}
Where do you want navigation controller(s)? You have to create one for each tab you want one in the UITabBarController.
You add a navigationController in conjunction with the first view controller on its stack. Try this:
// create the controllers for UITabBarController
tableViewController *vc1 = [[[TableViewController alloc] init] autorelease];
navController *nav1 = [[[UINavigationController alloc] initWithRootViewController:vc1] autorelease];
tableViewController *vc2 = [[[TableViewController alloc] init] autorelease];
navController *nav2 = [[[UINavigationController alloc] initWithRootViewController:vc2] autorelease];
// put them in an array
NSArray *controllers = [NSArray arrayWithObjects:nav1, nav2, nil];
// rest of your code
Also note that you need to release anything you alloc or retain. You can do it as I did by adding autorelease when you initialize them or you can release them explicitly after you've added them to the controllers array.
You then configure the navigationItem for each view controller in its loadView or viewDidLoad method depending on how you implemented it.