Swift: How to execute an action when UITabBarItem is pressed

Currently I have a Tab Bar Controller that is connected to a tableview controller. I'm trying to go to the top of the tableview when I press the tab bar item. I know how to get to the top of the tableview. I just don't know how to do an action when the item is pressed.

You should use UITabBarDelegate with method didSelectItem. Use it as any standard delegate:

class yourclass: UIViewController, UITabBarDelegate {
    func tabBar(tabBar: UITabBar, didSelectItem item: UITabBarItem) {
        //This method will be called when user changes tab.
    }
}

And do not forget to set your tab bar delegate to self in view controller.

Here is an answer to this question

Basically you do this:

• Make sure your view controller is subscribed to the UITabBarDelegate
• Set tags in IB for each tab bar item

• Implement the didSelectItem method, something like this:

  -(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
      if(item.tag == 1) {
         // Code for item 1
      }
      else if(item.tag == 2) {
         // Code for item 2
      }
  }
  

This will give you access to each tab item tapped event. Hope it helps!

In Swift:

func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
    if(item.tag == 1) {
        // Code for item 1
    } else if(item.tag == 2) {
        // Code for item 2
    }
}