Delete Data from Coredata Swift

Question

In my tableViewController I have the following. And I am trying to get delete an item to work.

var myData: Array = []

override func tableV         


        

Answer 1

Not sure what your question is but you have to delete the object from the NSManagedObjectContext instance. So in your commitEditingStyle function:

let moc = appDelegate.managedObjectContext // or something similar to get the managed object context
moc.delete(data)  // your NSManagedObject

Answer 2

Update on my coding issue with executing a delete of data in swift and coredata. This the code I ended up with that worked.

override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
        switch editingStyle {
        case .Delete:
            // remove the deleted item from the model
            let appDel:AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
            let context:NSManagedObjectContext = appDel.managedObjectContext!
            context.deleteObject(myData[indexPath.row] as NSManagedObject)
            myData.removeAtIndex(indexPath.row)
            context.save(nil)

           //tableView.reloadData()
            // remove the deleted item from the `UITableView`
            self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
        default:
            return

        }
}

EDIT Above for Swift 2.2 and Xcode 7.3.1

override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    switch editingStyle {
    case .Delete:
        // remove the deleted item from the model
        let appDel:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
        let context:NSManagedObjectContext = appDel.managedObjectContext
        context.deleteObject(myData[indexPath.row] )
        myData.removeAtIndex(indexPath.row)
        do {
            try context.save()
        } catch _ {
        }

        // remove the deleted item from the `UITableView`
        self.tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
    default:
        return
    }
}

Also need was these two lines of code to be corrected.

    var myData: Array<AnyObject> = []
let managedObjectContext = (UIApplication.sharedApplication().delegate as AppDelegate).managedObjectContext