CODEWITHSUNDEEP
iosswift
Hiro Shaw
Hiro Shaw

Reputation: 395

How to intercept tab bar selection?

If users touch any tab bar items, an alert is needed to present to confirm users' real intention.

Users can press OK to proceed the tab transitioning, or Cancel to stay on where they were.

However, methods like

tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController)

or 

tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController)

seem to be impossible to intercept tab transitioning.

Any solutions to work around such issue?

Upvotes: 2

Views: 551

Answers (1)

stevenpcurtis
stevenpcurtis

Reputation: 2001

Implement

UITabBarControllerDelegate

on your viewcontroller and there is a callback

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item

So you can then deal with the changes.

Alternatively find out the current selected tab with

tabBarController.tabBar.selectedItem.tag

Upvotes: 3

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