如何在ios中对这些tabBar项执行操作

Question

[items addObject:[[UITabBarItem alloc]
                      initWithTitle:@" Add Contacts" image:[UIImage imageNamed:@"images.jpeg"] selectedImage:[UIImage imageNamed : @"checkBox.jpeg"]]];

[items addObject:[[UITabBarItem
                       alloc]initWithTitle:@"Contacts" image:[UIImage imageNamed:@"images.jpeg"] selectedImage:[UIImage imageNamed : @"checkBox.jpeg"]]];

Answer 1

You can't directly add selectors to UITabBarItem .

You can achieve the functionality through - (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item delegate method.

Add tags to your UITabBarItem and implement the delegate method like:

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
    if(item.tag == yourTag)
    {
        // so your stuff here
    }
}

Answer 2

如果我们使用UITabBarController，则需要实现UITabBarControllerDelegate方法。

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;

Answer 3

Set up uitabbarviewcontroller in storyboard and define particular class. Each tabbar set index in inspector field uitabbarviewcontroller.

Then initial view controller in viewdidload method write this code.

I think helpful this code.

UITabBar *tabBar = self.tabBarController.tabBar;
UITabBarItem *item0 = [tabBar.items objectAtIndex:0];

[item0 setTitle:@"Home"];
[item0 setFinishedSelectedImage:[UIImage imageNamed:@"home_btn_hred.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"home_btn.png"]];
[item0 setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                               [UIColor darkGrayColor], UITextAttributeTextColor,
                               nil] forState:UIControlStateNormal];
[item0 setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                               [UIColor redColor], UITextAttributeTextColor,
                               nil] forState:UIControlStateSelected];