It helps a bit, but this way I change the Table View Cell Background "forever" to black, I just want to change it for one second, when it is clicked.

Unfortunately it still does not work. Maybe because I worked with the storyboard ? I linked the table view cell to another view, it works, but if I click on the the table view cell it gets light grey for just a moment before it shows the next page. Thanks to you it changes back to the original color when I go back. tableView.reloadRows(at: indexesToRedraw, with: .fade) was the line of code, which caused that. Should I try to get rid of the link in the storyboard and try it with code ?

        let indexesToRedraw = [indexPath]         selectedIndex = indexPath         array[indexPath.row] = true         tableView.reloadRows(at: indexesToRedraw, with: .fade)         sleep(1)         array[indexPath.row] = false         tableView.reloadRows(at: indexesToRedraw, with: .fade)         performSegue(withIdentifier: "shownext", sender: indexesToRedraw)    }         let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)         cell.textLabel?.text = array[indexPath.row]         if selectedIndex == indexPath {             if array[indexPath.row] {                 cell.backgroundColor = UIColor.black             }             else{                 cell.backgroundColor = UIColor.blue             }             cell.setSelected(true, animated: true)         } I basically did what you proposed, but the cell still turns light grey when clicked, I think somewhere in my code I did a basic mistake, but I can not figure it out. Thanks a lot for helping me this far.

Hi, thank you for your answer! I go from A2-> using TabBar clicking on B -> B1->B2-> usingTabBar clicking on A -> and now get to A2, but I always want my TabBar to go to A1/B1, your first solution might work, but "popToRootViewController" does not work, what do you mean by that ?

Xcode "says" this function does not exist. Where exactly did you place this function? In the TabBarController or in the ViewController from A1? import UIKit class MyTabBarViewController: UITabBarController {     override func viewDidLoad() {         super.viewDidLoad()     }     override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {         let rootView = self.viewControllers         [self.selectedIndex] as! UINavigationController         rootView.popToRootView // here the editor says that it does not work/exist //     } I made a class for the tab bar Controller and connected it to the storyboard. And what do you mean with IB ?

Thank you! I just made a new line, where no one was requested. Now it works like it should

I want a to do a popover window and that works if I have no Navgation Controller, because the new View appears over the old one. B1->B2 If I set the background color of B2 to Clear Color and put a Label with a blue background color on it. The program does what I want. The tricky part now is that I want to include this simple behavior to my project, which needs a NavController.

Sorry, I am not very good at explaining my problem. But your first answer works really good, after a few difficulties. Thank you, the solution was much simpler than I thought it could be

Thank you all ! With sudo gem install cocoapods it worked!

Yes table_entries ist the data source. I appending for each loaded data set the name, because I do not know how to get to the result(s) afterwards.

Okay thank you ! But how I reload the table ? Is there a function for it ?

Thanks for your answer! I am running the app on the iOS Simulator, the saved date is gone. I saved new data and closed and reopened xcode and the saved data were still there. Maybe it was just because of the update? @Claude31 I close the app sometimes in the simulator and sometimes in xcode. func saveProcedures(){         guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else{             return         }         let context = appDelegate.persistentContainer.viewContext         let entityname = "Fruits"         guard let newEnity = NSEntityDescription.entity(forEntityName: entityname, in: context) else {             return         }         let newProcedure = NSManagedObject(entity: newEnity, insertInto: context)         let size = "5-7cm"         let caption = "Orange"         newProcedure.setValue(size, forKey: "size")         newProcedure.setValue(caption, forKey: "caption")         do {             try context.save()             print("saved fruit")         } catch  {             print(error)         }     }     func loadProcedure (){         guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else{             return         }         let context = appDelegate.persistentContainer.viewContext         let entityName = "Fruits"         let request = NSFetchRequest<NSFetchRequestResult>(entityName: entityName)         do {             let results = try context.fetch(request)             for r in results{                 if let result = r as? NSManagedObject{                     guard let importance = result.value(forKey: "size") as? String else {                         return                     }                     guard let protocol_caption = result.value(forKey: "caption") as? String else {                         return                     }                     self.fruitsArray.append(caption)                     print("loaded")                 }             }             print ("done")             print (fruitsArray)         } catch  {             print(error)         }     }

I call this function right before I perform the segue with code // function with code for loading the data from core data print("loaded  " +&#9;caption)                     self.caption = caption                     self.size = size as! String                     self.text = text as! String                 }             }             print ("fertig")         } catch  {             print(error)         }         let vc =  ThirdViewController()         vc.initializer(caption : caption, size : size, text : text) //        Segue wird ausgeführt         performSegue(withIdentifier: "shownext", sender: indexesToRedraw)     }

I call saveProcedures() in the view did load of the view where I want to add data. The same with load Procedure(), if I dont want to add more data I make save Procedure a comment in the viewdidload(). Thank you for your advice, I will try it out!

Thank you now it works!