iOS tabBarItem badge value change from any View

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Im developing an iOS app using objective c. in my app if user is not register then register view controller is rootViewController. if user is register then tabBarController having three tabs is rootViewController. i have to set tabBarItem badge value from any view controller. suppose if i am on third tab and it is having segue with another view controller and i am on that view controller, i have to change the tabBarItem badge value of first view controller from here. in my case the tabBarItem badge value update only i go to that tab as i am using

NSString *upcomingcount=[NSString stringWithFormat:@"%lu",(unsigned long)self.arrbadge.count];
            self.navigationController.tabBarItem.badgeValue=upcomingcount;

in viewwillappear.

is there any way to set the badgeValue from any ViewController? i want to update badge value from any ViewController

plz use this method in your app delegate

 - (void)update_badgeWithViewControllerIndex:(NSInteger)ViewControllerIndex {


            UITabBarController *tabBarController =(UITabBarController*)[[(AppDelegate*)
                                                                         [[UIApplication sharedApplication]delegate] window] rootViewController];


              // Set the tab bar number badge.
              UITabBarItem *tab_bar = [[tabBarController.viewControllers objectAtIndex:ViewControllerIndex] tabBarItem];

              // Show the badge if the count is
              // greater than 0 otherwise hide it.

              if ([badgeValue > 0) {
                  [tab_bar setBadgeValue:badgeValue]; // set your badge value
              }

              else {
                  [tab_bar setBadgeValue:nil];
              }



    }

for use this method in every viewController create

@property (nonatomic,strong) AppDelegate *appDelegate;




self.appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

  [self.appDelegate update_badgeWithViewControllerIndex:yourViewControllerIndex];

How to set a badge value on a UITabBarController item, This is only displayed if the current view controller is part of a UITabBarController. A UITabBarItem has a badge value which is that little red� Im developing an iOS app using objective c. in my app if user is not register then register view controller is rootViewController. if user is register then tabBarController having three tabs is rootViewController. i have to set tabBarItem badge value from any view controller. suppose if i am on third tab and it is having segue with another view

You can use KVO to observe the change in your upcomingcount and update your badge value.

    -(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context{

        if ([keyPath isEqualToString:NSStringFromSelector(@selector(upcomingcount))]) {
            //SET BADGE VALUE HERE

        }

}

How to add a badge to your UITabBarItem, Learn Swift coding for iOS with these free tutorials. You can put a badge over any of your tab bar items, and doing so is a great way to To try it out, add this code to any view controller that's inside a tab bar controller: How to localize your iOS app � How to change your app icon dynamically with� A tab bar operates strictly in radio mode, where one item is selected at a time—tapping a tab bar item toggles the view above the tab bar. You can also specify a badge value on the tab bar item for adding additional visual information—for example, the Messages app uses a badge on the item to show the number of new messages.

func setBadge(){
        let viewconrollers = self.tabBarController?.viewControllers
        viewconrollers![3].tabBarItem.badgeValue = "Your String value"
        viewconrollers![3].tabBarItem.badgeColor = UIColor.green
    }


//call setBadge() method from view controller's viewdidload method.

// select your give number it the view controllers array for providing badge on the desired tab 

UITabBarItem, API Changes: None You can also specify a badge value on the tab bar item for adding additional visual information—for example, In iOS v5.0 and later, you can customize the appearance of tab bars by setting item label text attributes For more information about appearance and behavior configuration, see Tab Bars. Item: Actual toolbar item in which will add the badge Value: Actual number of the badge (Is a string so you can set numbers and texts, but just tested with 2 digits numbers :P). BackgroundColor: To set the badge background color TextColor: To set the badge text color

Using UITabBarAppearance for Tab Bar Changes in iOS 13, With iOS 13, Apple finally made some long overdue changes to the background color and selected/unselected tab bar item colors: but no longer works as consistently with iOS 13 (although it still will stacked for portrait iPhone view and inline for landscape iPhone view Find out what you're worth. To ensure the tab bar item is configured, you can either override this property and add code to create the bar button items when first accessed or create the items in your view controller' s initialization code. The default value is a tab bar item that displays the view controller' s title.

How to Change/Remove Badge Values from Cells in More , When I try change the badge value using different methods such as 'self. navigationController.tabBarItem.badgeValue = nil' etc but nothing happens or the badge� The solution is simple. Every UIViewController instance (or a subclass thereof) has a tabBarItem property of type UITabBarItem!. This property is used by the tab bar controller to configure the tabs in its tab bar. The title of a view controller's tab is fetched from the view controller's tabBarItem property.

Tab Bar Customization iOS Tutorial, Tab Bars provides the ability to quickly switch between different sections of an app. In this tutorial the look viewDidLoad() // Do any additional setup after loading the view, typically from a nib. guard let tabBar = self.tabBarController? Here a blue badge is created with the value of "123". Build and Run the� Even better, these badges can be anything you want - you can use a number if you like, but you can also use short words like “NEW” or even ASCII symbols like a star. To try it out, add this code to any view controller that’s inside a tab bar controller: tabBarItem.badgeValue = "NEW"

Comments
  • not working!! still badge updates only if we go on that view controller. thanks for the response
  • in fact i have tried the other way round also. created protocol of view controller and your method and delegate the method to AppDelegate.m , include .h file of my current view controller in AppDelegate.h declare the protocol and now xcode giving the strange error "" Cannot find protocol declaration for .......""".