I call this function right before I perform the segue with code // function with code for loading the data from core data print("loaded  " +	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)     }

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)         }     }

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

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.

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

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

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.

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

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 ?

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 ?

        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.

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 ?

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.