Tap tab bar to scroll to top of UITableViewController

Question

Tapping the tab bar icon for the current navigation controller already returns the user to the root view, but if they are scrolled way down, if they tap it again I want it t

Answer 1

I found the scrollRectToVisible method works better than the setContentOffset.

Swift:

After you catch the click on the tab bar from the delegate, something like below:

func tabBarController(tabBarController: UITabBarController, didSelectViewController viewController: UIViewController) {
 if (viewController.isKindOfClass(SomeControllerClass) && tabBarController.selectedIndex == 0) 
      {
        viewController.scrollToTop()
      }
 }

Now for the scrollToTop function inside the controller:

func scrollToTop()
{
    self.tableView.scrollRectToVisible(CGRectMake(0,0,CGRectGetWidth(self.tableView.frame), CGRectGetHeight(self.tableView.frame)), animated: true)
}