如何从主屏幕重新打开应用程序时刷新标签栏内容？ （iOS / Xcode）

Question

for all of my view controller.m I have the majority of my code in:

- (void)viewDidAppear:(BOOL)animated

So, each time I switch between tab bars all of the info in each view refreshes. (which is good!) Although, when I open the app from the home screen the tab won't update...I have to switch to another tab and back again to get it to load.

Any solutions?

Answer 1

You need to sign up for a notifications to handle it. Register each tab for the notification and a method to handle it. Then just perform your viewDidAppear. It works like a charm.

-(void)viewDidLoad {

   [super viewDidLoad];

   [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(becomeActive:)
                                                     name:UIApplicationDidBecomeActiveNotification
                                                   object:nil];
}

-(void)becomeActive:(NSNotification *)notification {
    // only respond if the selected tab is our current tab
    if (self.tabBarController.selectedIndex == 0) { // Tab 1 is 0 index, Tab 2 is 1, etc 
        [self viewDidAppear:YES];
    }

}

Answer 2

Maybe you can invoke all your refreshing code in

(void)applicationDidBecomeActive:(UIApplication *)application
{
}

this method is in your AppDelegate.

Answer 3

Try putting this in the view controller's m file:

- (IBAction)done:(id)sender {
    [self dismissModalViewControllerAnimated:YES];
}