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I have 3 viewControllers:

VcA: I read data with observers from database and pass with segue to VcB.

VcB: I read data and display it, with a button I call VcC to update data passing data with segue.

VcC: a STATIC tableview in which I update data and save them.

The problem is that when I dismiss after saved VcC and go back in VcB all data is old, even if in firebase all data are perfectly updated.

In VcB for example I read the Title like this:

 var groupName: String?

than in didAppear:

 Name.title = groupName

Anyway if I also go back from VcB to VcC all data of the table are the old data.

To be more clear:

I call the database in VcA

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click the name in the table and pass the data to Vcb, all is fine for now, title and other vars are ok

enter image description here

now I click EDIT and call to VcC, the table where I update the data, make change and save,

enter image description here

after save VcC dismiss and I go back to VcB -> title is still p2 but in firebase not!

enter image description here

I click again on EDIT to return to VcC (the edit table), title is the old one

enter image description here

I think that I have to recall data from db... anyway to do it without refresh the data from firebase?

I know that if I go back to VcA after save all is fine but I really need to go to VcB, how can I do?

I found many threads, this is the most similar but not exact situation... Reload tableView after dismiss a viewController

Jason Aller
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HaVaNa7
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1 Answers1

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If I can follow this correctly.

VcC:

protocol %NAME%Delegate
{
    func reloadData()
}


class VcC: UIViewController /*(or table)*/{
    var mDelegate : %NAME%Delegate?


    //in the func you use to dismiss self (VcC)
    //mDelegate?. reloadData()

}

VcB:

class VcB: UIViewController /* (or table)*/,%NAME%Delegate  {
    func reloadData(){
       tableView.reloadData()
       //OR
       //Observer for Firebase here to gather the new information. Make sure to reset all datasources if you do this.
    }
}
Torewin
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  • thnx but in VcB I have a simple ViewController not a table, the table is in VcC only – HaVaNa7 Oct 16 '17 at 07:52
  • It’ll work regardless. I just didn’t know which class to add. It’ll work with ‘view’ and ‘table’. – Torewin Oct 16 '17 at 12:01
  • I did it but when I arrive at VcB the title is still the old one maybe a problem with my dismiss method? _ = navigationController?.popViewController(animated: true) – HaVaNa7 Oct 16 '17 at 13:04
  • Make sure you're calling `mDelegate?.reloadData()` before the dismiss method. https://stackoverflow.com/questions/12561735/what-are-unwind-segues-for-and-how-do-you-use-them Here is a perfect example of what you are trying to accomplish. Very detailed answer. – Torewin Oct 16 '17 at 15:19