Can I change the first screen of a tab item programatically?
For example,
When user is in Tab A, upon tapping a button there, user will be
navigated to Tab C with Screen 1 However, when user is in Tab C, upon
tapping a button here, user will be navigated to Tab C with Screen 2.
Therefore, both screen 1 and 2 will be the first screen of Tab C
depend on where the user comes from.
Can I achieve something like that?
Thanks!
Based on this post How to replace a navigation root controller by tab bar controller in existing iphone app , can change the view controllers by this code:
NSMutableArray * viewControllers = [[NSMutableArray alloc]init];
FirstViewController * firstViewController = [[FirstViewController alloc]initWithNibName:#"FirstViewController" bundle:nil];
UINavigationController * nvc = [[UINavigationController alloc] initWithRootViewController:firstViewController];
[firstViewController release];
[viewControllers addObject:nvc];
[nvc release];
SecondViewController * secondViewController = [[SecondViewController alloc]initWithNibName:#"SecondViewController" bundle:nil];
nvc = [[UINavigationController alloc] initWithRootViewController:secondViewController];
[secondViewController release];
[viewControllers addObject:nvc];
[nvc release];
UITabBarController * tabBarController = [[UITabBarController alloc] init];
tabBarController.viewControllers = viewControllers;
[window addSubview:tabBarController.view];
Related
when we will navigate to another view controller. then using back button popviewcontroller property we can come to first view controller.
but what to do when we using MFSideMenu drawer. while clicking on drawer menu navigate to another screen. then how to come back on first view controller.
for navigating to another viewcontroller. I have used following code.
SCMainMenuViewController *scMainView = [[UIStoryboard storyboardWithName:#"Main" bundle:nil]instantiateViewControllerWithIdentifier:#"scMainMenuController"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:scMainView];
[self.menuContainerViewController setCenterViewController:nav];
[self.menuContainerViewController setMenuState:MFSideMenuStateClosed completion:^{
}];
Try this:
HomeView *Home = [[HomeView alloc] initWithNibName:#"HomeView" bundle:nil];
NSArray *controllers = [NSArray arrayWithObject:Home];
self.navigationController.viewControllers = controllers;
I started using UITabBarController and it is great.
The thing is I have a few views that aren't accessed from the UITabBar
(either presented modal programatically or we want to have a button on the top to jump to them)
The thing is that I want to retain the Tab bar visible in these views.
From my understanding mixing presentViewController and UITabBarController is problematic.
How can I do that? Can I have "hidden" tab bar elements I can reference programatically?
Just to clarify with an example:
Views A,B,C,D are in the tab bar - via the storyboard - everything is peachy.
I NEED to have views E and F clickable from the top navigation (please don't suggest a sliding TabBar or a multiple line UITabBar).
I could just jump to E and F but I want the UITabBar to still be visible so the user can jump from E to A for example.
Just use the good old UINavigationController for every tab and just use [self.navigationController pushViewController:A animated:YES];
That's how the setup looks in code:
SGTabBarViewController *rootVC = [[SGTabBarViewController alloc] init];
SGFirstTabViewController *firstVC = [[SGFirstTabViewController alloc] init];
UINavigationController *navController1 = [[UINavigationController alloc] initWithRootViewController:firstVC];
SGSecondTabViewController *secondVC = [[SGSecondTabViewController alloc] init];
UINavigationController *navController2 = [[UINavigationController alloc] initWithRootViewController:secondVC];
SGThirdTabViewController *thirdVC = [[SGThirdTabViewController alloc] init];
UINavigationController *navController3 = [[UINavigationController alloc] initWithRootViewController:thirdVC];
SGForuthTabViewController *fourhtVC = [[SGForuthTabViewController alloc] init];
UINavigationController *navController4 = [[UINavigationController alloc] initWithRootViewController:fourhtVC];
rootVC.viewControllers = #[navController1, navController2, navController3, navController4];
self.window.rootViewController = rootVC;
[self.window makeKeyAndVisible];
If you want your UITabBar visible on every VC you push just use hidesBottomBarWhenPushed = NO; on it.
However, there is no way to have UITabBar visible on views presented modally.
I have a navigation controller which has view controller(VC1) . This view controller has 3 button out of which 1 directs to a tab bar controller. From tab1 of the tab bar controller a button is there which navigates to a View controller(vc2).
The problem is VC2 is not displaying the tab bar. How can I make my VC2 display the tab bar.
Navigation Controller—> View Controller-->Tab bar Controller —>Tab1 -> View Controller (does not show tab bar)
I am doing this in IOS
Using a tabbarcontroller within a navigation controller is not recommended by Apple. However it is possible to do so.
In the VC1, write the following code.
UITabBarController *tabBarController = [[UITabBarController alloc] init];
MyStartViewController *startController = [[MyStartViewController alloc] initWithNibName:#"MyStartViewController" bundle:Nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:startController];
SecondViewController *viewController2 = [[SecondViewController alloc] initWithNibName:#"SecondViewController" bundle:nil];
self.viewControllers = #[navController, viewController2];
[self.navigationController pushViewController:tabBarController animated:YES];
Now within startController, add a UIButton. And in the button action, push the new VC2 from it.
Button action:
- (IBAction)buttonPressed {
MyViewController2 *vc2 = [[MyViewController2 alloc] initWithNibName:#"MyViewController2" bundle:nil];
[self.navigationController pushViewController:vc2 animated:YES];
}
Hope this will serve your purpose.
My IOS app has a login sequence that cannot be modified, once the sequence is complete I do the following in the app delegate
- (UIViewController*)newRootViewController {
NViewController *nView = [[NViewController alloc]
initWithNibName:#"NViewController"
bundle:nil];
UINavigationController *navVC = [[UINavigationController alloc] initWithRootViewController:nView];
[nView release];
return navVC;
}
Once in nView is it possible to add a tab bar controller or how can I replace nView with a tab bar controller.
You can create a UITabBarController then add your NViewController and other controllers to the tab bar.
NViewController *nView = [[NViewController alloc]
initWithNibName:#"NViewController"
bundle:nil];
//Create my tab bar
UITabBarController* myTabController = [[UITabBarController alloc]init];
//Add my tabs
NSArray* tabs = [[NSArray alloc]initWithObjects:nView, nil];
[myTabController setViewControllers:tabs];
How do you add the Navigation items on the popover (left pane) of the iPad's splitview? This is where the mailboxes/inbox/drafts part of the navigation is in the iPad's builtin email application.
Make the UISplitViewController’s “master” pane a UINavigationController, then just push UIViewControllers on it that have navigationItems.
Here’s a sample setup:
UIViewController *masterController = [[MyCustomMasterController alloc] init…];
[[masterController navigationItem] setTitle:#"Root"];
UINavigationController *navController =
[[UINavigationController alloc] initWithRootController:masterController];
UIViewController *detailController [[MyCustomDetailController alloc] init…];
UISplitViewController *splitView = [[UISplitViewController alloc] init];
[splitView setViewControllers:[NSArray arrayWithObjects:navController,
detailController,
nil]];
And then later on:
UIViewController *subController = [[MyCustomSubController alloc] init…];
[[masterController navigationController] pushViewController:subController
animated:YES];
Pushing a new UIViewController to the UINavigationController’s stack will cause a back button titled “Root” to appear for the MyCustomMasterController view.