How to update existing object in core data ? [Swift]

Question

I have preloaded data from a .csv file into coredata. I am fetching the data in the following way

var places:[Places] = []

in viewDi

Answer 1

Your current code is:

if let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext {

            let place : Places = Places()
            place.isFavourite = cell.isFavouriteLabel.text
             do{
                try managedObjectContext.save()
            } catch let error as NSError{
                print(error)

            }
          }

That would create a new place (if it worked), but you need to update an existing one.

You have the places returned from managedObjectContext.executeFetchRequest.

So you need to get something like places[index_of_the_cell_in_question].isFavourite = cell.isFavouriteLabel.text

and then managedObjectContext.save().