Tap TabBarItem to scrollToTop

Question

How can it be done ?

I tried everything I could find on stack overflow and nothing worked for me. I would like a solution that will work like Instagram. If you scrolled down tap the TabBarItem to go to the top .( I generally use tableviewControllers and not view controllers if that matters the code)

Any help will be appreciated

In swift 2.2 thank you!

What i tried:

//Using the UiTabBarDelegate
class BarsViewController: UITableViewController,UISearchResultsUpdating,UISearchBarDelegate,UISearchDisplayDelegate,UITabBarControllerDelegate,UITabBarDelegate{

    func tabBar(tabBar: UITabBar, didSelectItem item: UITabBarItem) {
            if(item.tag == 1) {
                //your code for tab item 1
                
            tableView.scrollToTop(true)
            
            }
            else if(item.tag == 2) {
                //your code for tab item 2
            }
            else if(item.tag == 4) {
                //your code for tab item 4
                self.tabBarItem.badgeValue = nil
                
                tableView.scrollToTop(true)        }
        }
    }
    
    extension UITableView {
        func scrollToTop(animated: Bool) {
            setContentOffset(CGPoint.zero, animated: animated)
        }
    }

score 1 · Answer 1 · answered Mar 04 '17 at 22:49

1

In your button action, call tableView.scrollToRow(IndexPath(row: 0, section:0), at scrollPosition: .top, animated: true)

answered Mar 04 '17 at 22:49

creeperspeak

5,403
1
17
38

i had to fix he line to this : `tableView.scrollToRow(NSIndexPath(row: 0, section:0), at, scrollPosition: .top, animated: true)` and i get an error `use of unresolved identifier 'at'` – Newbie Questions Mar 11 '17 at 18:30
Yes, you added an extra comma after "at". My code is in swift 3, so you'll need to change it if you're on an older version. – creeperspeak Mar 11 '17 at 18:38

score 0 · Answer 2 · edited May 23 '17 at 12:25

0

Select your tableView and look at the attributes inspector on the right and make sure scrollsToTop is selected or try self.yourTableView.scrollsToTop = true

If you want to scroll to top on an action create an extension like this,

extension UITableView {
func scrollToTop(animated: Bool) {
    setContentOffset(CGPoint.zero, animated: animated)
 }
}

then in the tabbar or button call the function like this,

tableView.scrollToTop(animated: true)

This is in swift 3 but I received the info from this answer and was written in an earlier version of swift, scroll to top of tableView

edited May 23 '17 at 12:25

Community

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1

answered Mar 04 '17 at 22:42

K-2SO

233
1
12

Doesn't work i want when i scrolled down i press the tabbarbutton and it will scroll back up – Newbie Questions Mar 05 '17 at 00:16
I will look into it but you are talking about the statusbar not a tabbar right? – K-2SO Mar 05 '17 at 07:14
im talking about the tabbar.I want when im scrolled down in my tableviewcontroller i will press the current tabbarbutton that is selected and it will scroll to the top exactly what happens when you tap the status bar but if you press the current barbuttonitem... you got it? – Newbie Questions Mar 05 '17 at 07:17
Cool.I will try it in the upcoming weekend as i just returned to the army. – Newbie Questions Mar 05 '17 at 15:20
No @K-2SO it didnt – Newbie Questions Mar 09 '17 at 08:19
you set your delegates and all that stuff in your viewcontroller right? TableView and Tabbar? – K-2SO Mar 09 '17 at 08:47
Yea i did@K-2SO – Newbie Questions Mar 09 '17 at 09:17

Tap TabBarItem to scrollToTop

What i tried:

2 Answers2