I have an application that has a tabBar that handles all the views. In the first view I have a login process. When that process finishes I want to go automatically to the second tabBar view without making the user to click in its respective tabBar button.
All I've got until now is to highlight the button with this:
myTabBar.selectedItem = [myTabBar.items objectAtIndex:1];
But I have no idea about how to bring the second view related to that button to the front, automatically. Until now the user has to press the button when it gets lighted (selected).
Any idea about how to do this? Is it possible? It would be much appreciated. Thanks.
Use the selectedViewController or selectedIndex methods of the corresponding UITabBarController.
In response to the comments on this answer, I have provided an example of how this might be accomplished:
id firstViewController = [[FirstViewController alloc] initWithNibName:#"FirstView" bundle:[NSBundle mainBundle]];
id secondViewController = [[SecondViewController alloc] initWithNibName:#"SecondView" bundle:[NSBundle mainBundle]];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:firstViewController, secondViewController, nil];
[firstViewController release];
[secondViewController release];
// Select the second tab bar item and its view
self.tabBarController.selectedIndex = 1;
[self.window addSubview:tabBarController.view];
[self.window makeKeyAndVisible];
In my testing, it seems that using the selectedViewController method of UITabBarController to set the current view does not update the selectedIndex property (the new view is displayed but the selected UITabBarItem is not changed). This is in contrast to the behavior promised in the documentation. Using the selectedIndex method as demonstrated in the code snippet above should work fine, however.
you should implement the UITabBarControllerDelegate protocol, as explained here: http://developer.apple.com/library/ios/#documentation/uikit/reference/UITabBarControllerDelegate_Protocol/Reference/Reference.html
to change the active tab, use tabBarController:shouldSelectViewController:
As explained in the documentation "You can use this method to dynamically decide whether a given tab should be made the active tab."
Finally I got the solution here:
iphone sdk: set focus to different tabbar view on button click from first tabbar item
Thanks anyways.
Related
my application have a tabbarcontroller with 4 view Controllers.
Its called here :
self.window.rootViewController = tabBarController;
The view controller that appear first in the tabbar is called "Home"
I want when opening the app to load the viewcontroller and not just the tabbar. It is possible? I want the ViewDidLoad() method from my Home view controller to be called. Thanks
If your application is based on a TabBarController, you want to load the viewControllers into your TabBarController and then add the TabBarControllers view to the window. For example:
FirstViewController *fvc = [[FirstViewController alloc] init];
SecondViewController *svc = [[SecondViewController alloc] init];
tabBarController.viewControllers = [NSArray arrayWithObjects:fvc,svc,nil];
[window addSubview:tabBarController.view];
[fvc release];
[svc release];
where tabBarController is an instance variable and property. The first tab to display when your app launches will be the first one you load into the array. In this case it is fvc.
Hope this helps.
Just go as usual load the first viewController (use it as Home page )and handle the tabbar hidden property (where you want to show or hide it).
So before I've managed to work with TabBarViewControllers and create an application using them. However every time I do so the view acts as my main view. This time around I want my TabBarView to be my second view in my application
E.g
First window has a bunch of buttons, when I click one of these buttons I want the second view to show up. This view includes a TabBarViewController.
The farthest I've gotten is to have the button show a view but for some reason it won't show my TabBar view!
Here's the code for my button
- (IBAction)showEvents:(id)sender {
EventsViewController *controller = [[EventsViewController alloc] initWithNibName:#"EventsView" bundle:nil];
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:controller animated:YES];
}
Any of you guys able to help?
Can't you just in the EventsViewController add the following code in viewDidLoad:
UITabBarController *tbc = [[UITabBarController alloc] init];
tbc.viewControllers = [NSArray arrayWithObjects: vc1, vc2, ..., nil];
Anyway, I found a solution and it was actually quite simple. After creating the Outlet for the TabBarController and linking it together with File's Owner all I had to do was add
self.view = tabViewController.view;
On the viewDidLoad method
In my iphone app, i have a navigation Controller and a tabBar Controller.
The TabBarController has three tabs. In the second and third Tab the NavigationController are added to the viewControllers.
Problem :
In third tab viewController shows the NavigationBar but the in second tab viewController doesnot display navigationBar.
Things I have tried and checked:
1) I checked that all the connections in IB are done properly
2) I checked the size of frame for the view. It doesnot overlap the navigationBar.
3) I also tried using self.navigationController.navigationBar.hidden = NO;
But still it does not show the navigationBar in the second tab.
What should I do?
Please Suggest
Please Help
Thanks!!
We can't do much without looking at your code.
Assuming your TabBarController is properly connected in Interface Builder, you'll need something similar to this:
UIViewController *firstView = [[UIViewController alloc] init];
UIViewController *secondView = [[UIViewController alloc] init];
UIViewController *thirdView = [[UIViewController alloc] init];
UINavigationController *firstNav = [[UINavigationController alloc] initWithRootViewController:secondView];
UINavigationController *secondNav = [[UINavigationController alloc] initWithRootViewController:thirdView];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:firstView, firstNav, secondNav, nil];
Of course, have every view released afterwards.
Hmmm thats a problem i faced too.
If you look at your IB file ,you'll see that you can do a bit of tweaking and acheive it.
i'll post details as soon as i get time.
Oops!!! a big mistake on my part.I did not check the checkbox for "show navigation bar" in inspector for NavigationController. Hope this helps someone.
I want to customize the look and feel of the tab bar of a UITabBarController. I want to change the colors, the way the icon looks when they are selected, and also, most important of all, I want to reduce the size of the custom toolbar.
My approaches for this and the hurdles in it are:
A) The first solution which came to my mind was to create my own viewController which will act like a UITabBarController with buttons in the bottom and add this viewController to the window. Once when user taps a button at the bottom, swap the view in the viewable area with the new viewController's which corresponds to the button now tapped by user.
The problem with this strategy is: since I swap view's the corresponding viewControllers will not get these messages:
viewWillAppear
viewWillDisappear
viewDidAppear
viewDidDisappear
And all the rotation events
B) I could have used the accepted answer's approach in this thread:
Custom UITabBarController Problems with View Controllers and Views
But my tabBar's height is not the same as the default.
Due to the cited reasons above, I cannot use those approaches.
Having said this, I have no special requirement of More tab. I will be having only 5 tabs which will be displayed by the tab bar and hence the re-ordering of tab bar items is out of scope.
Awaiting suggestions and ideas.
I have never attempted something like this but as I see it, you are supposed to send those messages to your child view controllers manually.
It shouldn't be problem to send -viewWill/Did(Dis)Appear to the right controller at the appropriate moment. This is what UITabBarController does, too.
As for rotation events:
In shouldAutorotateToInterfaceOrientation:, forward this message to your child controllers and set your return value depending on their return values (UITabBarController only returns YES if all its child controllers return YES for the requested orientation).
Forward willRotateToInterfaceOrientation:duration:, didRotateFromInterfaceOrientation: and willAnimateRotationToInterfaceOrientation:duration: to the child controllers (at least to the currently visible one) when you receive them.
If you have set the autoresizing masks of your child controllers' views correctly, they you rotate and resize correctly when the system rotates your custom tab bar controller's view. (At least I think that's how it should work.)
Again, I'm not sure if this will work.
You can implement the following code for the creating the custom tab bar in that use to images using the CGRect make.further code is use for the creating the custom tab bar
-(void)applicationDidFinishLaunching:(UIApplication *)application {
// Add the tab bar controller's current view as a subview of the window
tabBarController.delegate = self;
tabBarController = [[UITabBarController alloc] init];
mainDashBoard = [[DashBoard alloc] initWithNibName:#"DashBoard" bundle:nil];
mainSearchView = [[SearchView alloc] initWithNibName:#"SearchView" bundle:nil];
mainMoreView = [[MoreView alloc] initWithNibName:#"MoreView" bundle:nil];
UINavigationController *nvCtr0 = [[[UINavigationController alloc] init] autorelease];
UINavigationController *nvCtr1 = [[[UINavigationController alloc] initWithRootViewController:mainDashBoard] autorelease];
UINavigationController *nvCtr2 = [[[UINavigationController alloc] initWithRootViewController:mainSearchView] autorelease];
UINavigationController *nvCtr3 = [[[UINavigationController alloc] initWithRootViewController:mainMoreView] autorelease];
UINavigationController *nvCtr4 = [[[UINavigationController alloc] init] autorelease];//[[[UINavigationController alloc] initWithRootViewController:nil] autorelease];
tabBarController.viewControllers = [NSArray arrayWithObjects:nvCtr0,nvCtr1,nvCtr2,nvCtr3,nvCtr4,nil];
nvCtr0.tabBarItem.enabled = NO;
nvCtr4.tabBarItem.enabled = NO;
[window tabBarController.view];
}
So, I'm having some issues with my implementation of the Three20 TTLauncherView. I am using their code, not a fork (although I have heard of rodmaz's version), and I can't get it to work properly. This is what my app looks like.
alt text http://img709.imageshack.us/img709/8792/screenshot20100715at409.png
I removed the icon image, that's not the issue. The issue is, at the top there is no Navigation bar at all, and I believe also causes the white strip at the bottom, which appears to have the same dimensions as a Nav Bar. I've spent quite a while looking through their code and can't figure this out at all. It looks like their Navigation bar (as seen in their Catalog example app) stems from the TTTableViewController, or something further up. However, my app starts like the Facebook app does, not into a table, but into the TTLauncherView. So... how do I get the Navigation bar into my TTLauncher view, if it goes "App Delegate -> TTLauncherView Subclass"
Thanks for your help!
Edit:
Added the code I used. I put this in my app delegate, wrapping my first view with the UINavigation Controller, and it worked just as I wanted!
MainViewController *aController = [[MainViewController alloc] initWithNibName:nil bundle:nil]; //my Main view
self.mainViewController = aController;
[aController release]; //release for Memory Management
self.mainViewController.view.frame = [UIScreen mainScreen].applicationFrame;
UINavigationController *navigationController = [[UINavigationController alloc] init];
[navigationController pushViewController:self.mainViewController animated:NO]; //Gets the main view on the screen
[window addSubview:navigationController.view];
You simply wrap the view with a navigation bar before you push the new view. As an example, here is a snippet of my code where I present a modal view controller with a navigation bar.
- (IBAction) showNewNavView: (id) sender
{
// Present it as a modal view and wrap the controller in a navigation controller to provide a navigation bar for the Edit and Save buttons
ModalViewController *addController = [[ModalViewController alloc] initWithNibName:#"ModalViewController" bundle:nil];
addController.delegate = self;
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addController];
navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;
[self presentModalViewController:navigationController animated:YES];
[navigationController release];
[addController release];
}
If you want to add any buttons or set the title of it, you need to do that in the viewDidLoad method of the view that you are pushing (i.e. your TTLauncher view)