Good Morning Guys/Girls
I am very new at programming for the iPhone, i have done alot of examples. I can create tabview project successfully and tableviews opening from SQL.
However i am finding it very difficult to try and put them all together, i am not sure i am getting the delegates very well.
I would like to ask someone if possible to please please help me with this problem to try and understand this better.
What i am trying to do exactly is have a TabView Project, each tab would have a navigationcontroller page (so a table with say search on top, and table view) the data is being populated either from sqllite3 or datacore.
Thats it.
it seems simple enough, but i am sorry, i need to see a working example to see how these multiple controllers are being loaded. Do you delegate each in a different class? please if someone can make an example to so i can load it and see.
thank you
Eden
I always prefer creating complex multiviews through coding.
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.
Related
I am using XCode 4.3 and I am creating a tab bar application following an example in my book (likely used for XCode version < 4.3).
By default the newly created tab-bar application includes 2 tabs. you can see my screenshot
And now I would like to add another tab (the TabExampleThirdViewControler as you also see in the image). But I don't know how to make it the third tab. My old book says that I need to link it to the MainWindow but as you see in the image, there is no MainWindow file at all.
This sort of update from new version of XCode pretty confuses a beginner like me. Thank you for any guidance you could offer.
I am not sure what approach you are follwoing to create tabs. But look at mine. I always create tabs like this. This is very easy to implement :
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];
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.
I have one tabbarcontroller set as main controller and its views were configured using interface builder. Now, programmaticaly, I would like to change default class view. How can it be done? For example, one tab view is set from class1 and I would like to set it from class2. Thank you.
I am not sure if this is what you meant, but to assign different view controllers programmatically to a tabbarcontroller you can use this:
UIViewController *viewController1 = [[FirstTab alloc] initWithNibName:#"FirstTab" bundle:NSBundle.mainBundle];
UINavigationController *firstNavController = [[UINavigationController alloc]initWithRootViewController:viewController1];
UIViewController *viewController2 = [[SecondTab alloc] initWithNibName:#"SecondTab" bundle:NSBundle.mainBundle];
UINavigationController *secondNavController = [[UINavigationController alloc]initWithRootViewController:viewController2];
myTabBarController = [[UITabBarController alloc] init];
myTabBarController.viewControllers = [NSArray arrayWithObjects:firstNavController, secondNavController, nil];
I would add and remove a tab bar item rather than changing the view controller of a single item.
Probably not animated.
I am new to xcode and trying to understand how UITabBarController works. I have been looking everywhere and could not find a straight solution to this question. In the majority of the examples/tutorials that I see, the UITabBarController is defined in the AppDelegate, and then once you launch the app, you see the tab bar right away. In my app, I want to show a welcome screen first, then once you click "Enter" you get to the tabbar view. So the ideal structure of my objects will be the following:
MyProjectAppDelegate --> MyProjectViewController --> FirstView / SecondView
As far as my understanding, nothing tabbar related should then be declared in MyProjectAppDelegate with this structure. I tried to look at some examples where the UITabBarController is declared in the AppDelegate and do the same in the MyProjectViewController, but nothing happens.
For example, I did this in my MyProjectViewController within an IBAction that is connected to the "Enter" UiButton on my welcome screen:
- (IBAction) EnterApp {
[window addSubview:tabBarController.view];
tabBarController = [[UITabBarController alloc] init];
tabBarController.delegate=self;
FirstView* first = [[FirstView alloc] init];
UINavigationController *firstNav = [[UINavigationController alloc] initWithRootViewController:first];
SecondView* second = [[SecondView alloc] init];
UINavigationController *secondNav = [[UINavigationController alloc] initWithRootViewController:second];
NSArray* controllers = [NSArray arrayWithObjects:firstNav,secondNav, nil];
tabBarController.viewControllers = controllers;
[window addSubview:tabBarController.view];
}
Again, this did not do anything once I clicked on the "Enter" button, even though it does the job in the example where I took it from (where it's within the AppDelegate)
I also tried this on my MyProjectViewController, where the tabbar did show up on the First/Second view, but with no option to customize it (just blank black bars with nothing on them and no idea where to configure them):
- (IBAction) EnterApp {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UIViewController *viewController1 = [[FirstView alloc] initWithNibName:#"FirstView" bundle:nil];
UIViewController *viewController2 = [[SecondView alloc] initWithNibName:#"SecondView" bundle:nil];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];
self.window.rootViewController = self.tabBarController;
[self.window makeKeyAndVisible];
}
What went wrong here and what should be the right way to go about doing that? A quick example would be highly appreciated.
Thanks!
I have something similar in one of my apps. At first launch it shows a login screen. After the user successfully logs in, the app switches to a tab bar controlled view.
I do the switching in my appdelegate. The login view sends a notification which the app delegate observes and rebuilds the screen:
- (void)switchView:(NSNotification *)notification {
MyTabbarView *homeView = [[MyTabbarView alloc] init];
NSArray *controllers = [NSArray arrayWithObject:homeView];
[mainNavController setViewControllers:controllers animated:YES];
mainNavController.navigationBar.barStyle = UIBarStyleBlack;
mainNavController.navigationBar.hidden = NO;
[homeView release];
}
Hi friends ,I have question ,Is this possible to use two different tabbar class in the same app.
It mean I have Two tabbar controller in my app.
Like 1st is newtabcontroller.h & newtabcontroller.m
2nd is oldtabcontroller.h & oldtabcontroller.m
is possible to use two different tabbarcontroller in app.
thanks
why not?
But it should not be a tabbarcontroller inside another tabbarcontroller.
Have a TabbarManager class. Then on some condition, load
- FirstTabbarController or
- SecondTabbarController
All components and the UITabbarControllers themselves should be instantiated in the TabbarManager 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;
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,