I have developed a tab based iphone application.
In this, I am facing a problem as described below:
The view associated with 1st tab bar contains 2-3 buttons. Action of these buttons are to load another view. Now on pressing these buttons the views are loading but in full size(320x480) and hiding the tab bar.
I want to load that view just above the tab bar so that tab bar is accessible.
I explicitly set the view frame in that view's viewDidLoad function, but it is not working.
Please help me out.
Try this :
You need to start with view based application. And then create a UITabbarController in you appDelegate file.
Appdelegate.h
UITabBarController *tabBarController;
// set properties
Appdelegate.m
// Synthsize
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.
Rename the tbs as per your requirement. Place 2 buttons in the one of the views which is Navigation controller.
Hope this helps.
Typical application navigation allows the user to freely move forwards and backwards, between tabs etc. This is facilitated by pushing and popping ViewController's on the navigation bar stack.
In certain scenarios you want to force the user to complete some task and this is when you should use a modal view controller. When the application presents a modal view the idea is that the user should NOT be able to navigate away from the view, instead they should only be able to complete or cancel the action and hence the default behavior for a modal view is to hide the navigation bar, tab bar etc.
It sounds to me from your description that you are performing navigation and not a modal task and thus can I recommend using pushViewController instead of presentModalViewController?
If you are only using presentModalViewController because you want a bottom to top animation then you'll need to use a custom animation.
Related
Basically I have
ViewControllerA *aVC = [[ViewControllerA alloc] init];
ViewControllerB *bVC = [[ViewControllerB alloc] init];
UITabBarController *tabBarVC = [[UITabBarController alloc] init];
[tabBarVC setViewControllers:[[NSArray alloc] initWithObjects:aVC, bVC, nil] animated:YES];
Now I can see the two tabs on the tabBarController but when I switch from one tab to another, I can't see any effects, neither on simulator or on real device. From the documentation I should be able to see fading right? Did I miss anything?
If you pass YES to setViewControllers:animated:, UITabBarController will animate the insertion of the the new tab bar items in the tab bar. It doesn't animate the transition between view controllers if the user then switches from one tab to another.
Is it possible to skip a view in a Navigation Controller? My structure is as follows:
**Main Screen Navigation Controller**
-Main Screen View
**Options Navigation Controller (Modal transition from Main Screen View)**
-Options Screen View
--Sub Options Screen View(Push from Options View)
On the first load of the application, I want to present a "Welcome" UIAlertView that will present the "Sub Options" screen.
Thanks
You'll have to build your navigation stack programmatically and then modally display the UINavigationController. Use the viewControllers property. The last view controller in the passed in array will become the top view controller.
OptionsViewController *ovc = [[OptionsViewController alloc] init];
SubOptionsViewController *sovc = [[SubOptionsViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] init];
nav.viewControllers = [NSArray arrayWithObjects:ovc, sovc, nil];
[self presentModalViewController:nav animated:YES];
Yes. If you read the documentation for UINavigationController, you'll see there's a method called setViewControllers:animated: that you can use to explicitly set the entire stack of view controllers at once.
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,
So, I want my app starts with a UIViewController(without seeing a tabbar), and then enter a UITableView with navigationbar and tabbar. the problem is that the Tabbar is visible at the app starts up, anyone can help on this will be very appreciated...
I think you should either send -presentModalViewController:animated: to your main UIViewController with the tab bar controller as an argument or just do this:
[myWindow addSubview: myTabBarController.view];
Make your app a navigation based application (rather than a tab bar based one) then add a tab bar on the UITableView.
There is help for adding the UITabBar here
I do it like this : in this case drawing a table view and map view (From the Locati application)
tabBarController = [[UITabBarController alloc] init]; // creates your tab bar so you can add everything else to it
searchTableViewController = [[SearchTableViewController alloc] init]; // creates your table view - this should be a UIViewController with a table view in it, or UITableViewController
UINavigationController *searchTableNavController = [[[UINavigationController alloc] initWithRootViewController:searchTableViewController] autorelease];
[searchTableViewController release]; // creates your table view's navigation controller, then adds the view controller you made. Note I then let go of the view controller as the navigation controller now holds onto it
searchMapViewController = [[SearchMapViewController alloc] init];
UINavigationController *mapTableNavController = [[[UINavigationController alloc] initWithRootViewController:searchMapViewController] autorelease];
[searchMapViewController release]; // does exactly the same as the first round, but for your second tab at the bottom of the bar.
tabBarController.viewControllers = [NSArray arrayWithObjects:searchTableNavController, mapTableNavController, nil]; //add both of your navigation controllers to the tab bar. You can put as many controllers on as you like
I found this pattern a long time ago. Sorry that I can't point at the original.
YOu then need to add the tabbarcontoller to the relevant view ([...view addSubView:tabBarController];) possibly setting frame first.