iOS Connecting actions (methods) to tab bar item

[jonanders89]

Hello!

I've googled and googled, and dont seem to find any complete answer to my question.

I can't find the solution to how i can add actions to my tab bar items.

I have a Delegate class:

@interface MyProjectAppDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate> {
    UIWindow *window;
    UITabBarController *rootController;

}

and the implementation

#import "MyProjectAppDelegate.h"

@implementation MyProjectAppDelegate

@synthesize window;
@synthesize rootController;

#pragma mark -
#pragma mark Application lifecycle

-(void) applicationDidFinishLaunching:(UIApplication *)application{
	[window addSubview:rootController.view];
	[window makeKeyAndVisible];
}

and i've created seperate classes(with XIB files) for each tab bar item. The switching between views works beautifully. The problem is however, when someone select a view, i want the content in that view to be refreshed.



I've seen the documentation, and especially tried to understand the didSelectItem method, but i cant figure out how its working. Can someone please push me in the right direction? I dont understand how the methods in the delegate class can acess the content in another view?

 

[jnoxx]

2 ways you can "try" to achieve what u wan't, because I don't know what u mean, by "refreshed".

You probably have some code in your viewDidLoad.
you want to put that in the viewWillAppear. That is the first try.
But also in the delegate methods of UITabbarController (if u just Command clicked it..) u see there are some methods u could MAYBE use?

@optional
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;

- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray *)viewControllers
- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray *)viewControllers changed:
- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray *)viewControllers changed:(BOOL)changed;
@end

There are some choices.
Especially the one called, didSelectViewController.
U could maybe add code there..

 

[jonanders89]

Ahh, my question was bad formulated.

What i meant, is that i have a textView in one of my views. That view is selected from a tab bar item. My goal is that whenever a user selects that view from the tab bar, i want to call an action that handles myTextView.

So, i need to add an action to that tabBarItem, but i can acess that action in my Tab Bar, since that action is decleared within another view (another class file)

 

[jonanders89]

Solved with another solution. Added my code for the respective view in the viewWillAppear method instead.