how to get the event that switch tab menu on iphone
Solution 1
If you are using storyboard, do this
in didFinishLaunchingWithOptions
UITabBarController *tabBar = (UITabBarController *)self.window.rootViewController;
[tabBar setDelegate:self];
Also in AppDelegate, keep <UITabBarControllerDelegate>
And then
-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{
//Write your code here
}
Solution 2
Implement UITabBarControllerDelegate
e.g. in your app delegate's applicationDidFinishLaunching
- (void)applicationDidFinishLaunching:(UIApplication *)application
{
tabBarController.delegate = self;
[window addSubview:tabBarController.view];
}
Then implement either:
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController;
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;
The first method is called before the view switch and gives you a chance to 'veto' the view switch by returning NO
The second method is called after the view switch has taken place
Solution 3
Better late than never. In case of swift 4 you can do it in the following way.
tabBarViewController.delegate = self
And implement UITabBarDelegate
in your class.
You will get the callback in
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
//Stuff to do
}
Solution 4
Have a look at the following method in UITabBarControllerDelegate:
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
Tells the delegate that the user selected an item in the tab bar.
Solution 5
Is UITabBarControllerDelegate
what you're looking for, particularly -tabBarController:didSelectViewController:
?
Yan
Updated on August 30, 2020Comments
-
Yan over 3 years
I'm trying to figure out how to catch the event that controls the switch tabs on the
UITabBarController
. How could I accomplish this?