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iOS

Posted by wasiq aftab
wasiq aftab
1,994 Points

tabBar Controller

i have created a single application and then created 2 tabs programmatically, then i have created 2 buttons tab 1 and tab 2 here is the code of .m file 

- (IBAction)tab1:(id)sender {
    self.tabBarController.selectedIndex=0;
}

- (IBAction)tab2:(id)sender {
    self.tabBarController.selectedIndex=1;
}

here is the code of my appdelegate.m


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    // Override point for customization after application launch.

self.tabBarController = [[UITabBarController alloc] init];

UIViewController *viewController1 = [[firstViewController alloc] init];

UIViewController *viewController2 = [[secondViewController alloc] init];

self.tabBarController.viewControllers=[NSArray arrayWithObjects:viewController1,viewController2, nil];

 //self.window.rootViewController = self.tabBarController;

self.window.backgroundColor = [UIColor whiteColor];


    return YES;
}

apparently there is no error in this code, if i set the tabbarcontroller as root it shows the tabs but when i want the viewcontroller to be root and buttons pointing to the tabs it doesnt work.

3 Answers

Amit Bijlani
STAFF
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

It's doing exactly what it's supposed to be doing. The whole point of the UITabBarController is to dynamically create and display tabs based on the viewControllers property.

wasiq aftab
wasiq aftab
1,994 Points
wasiq aftab
wasiq aftab
1,994 Points

Amit can you please tell me any snippit code how i can use it. to achive what i want

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

What are you trying to achieve? It's not clear from your post above.

wasiq aftab
wasiq aftab
1,994 Points

i have got 2 buttons on the home screen, i want to link multiple buttons with corresponding tabs, when user press button 1, tab 1 should open, when user press button 2 tab 2 should open.

i tried to achieve this using sagues. i created a single view application and used a tab bar controller in storyboard and then i tried to connect each button with different tab node,

i want to know which approach would be most appropriate ? and whats missing ?

if you can provide me with a link to similar example it would be a big help Thanks.

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Sorry, can you share your project. I'm having a hard time imagining why you would have a button link to a tab. Linking a button a tab seems counter intuitive.

wasiq aftab
wasiq aftab
1,994 Points

HI

Sorry for my Bad Communication. what i am trying to do .

  1. Main Screen which have pattles like windows 8
  2. if some one click on any pattle it will take it to another page/ screen
  3. and on the screen i have the tab view related to that view.

Difficulty:

i have made the home screen with pattles. now i dont know how i open the next scene on clicking a pattle.

can you please tell me how i can do that.

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

You need a navigation controller. Once you have a navigation controller then you can push other controllers.

wasiq aftab
wasiq aftab
1,994 Points

Thanks alot i will try in that way.

wasiq aftab
wasiq aftab
1,994 Points

any recommended link which i will study

ralphmannuni
ralphmannuni
3,022 Points
ralphmannuni
ralphmannuni
3,022 Points

Hey Amit - Again, this is an extra credit example but there is no solution posted anywhere. Futher, Wasiq asked for help 10 months ago and you still didn't reply. Why create extra credit if you guys can't support it?

-R

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Wasiq mentioned above that he was trying to create a Windows 8 like interface. We don't have any iOS extra credit that asks you to do that. We offer Extra Credit assignments so you can challenge yourself and take your knowledge further. You are not required to do them. The goal is take what you have learned and apply that knowledge. We feel it wouldn't help you to learn if we simply provided you with the answer. As a developer you are constantly in unchartered waters and figuring out solutions is what we do and have to get used to. Google and Stack Overflow are sometimes your best friends.

Finally, the forums are here so students can help each other. We try to help as much as we can but we get flooded with support and it's difficult to answer every question. We rely on our moderators and other students to help each other. You also want to avoid replying to really old threads because those students may no longer be around to respond. If you post a new thread asking for help then I doubt you will not get an answer.