具有相同名称的核心数据删除对象

Question

//taken from Core Data    
var items:NSMutableArray = ["Item 1","Item 2","Item 1","Item 3"]

    func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
         if(editingStyle == .Delete){
            let itemName = items.objectAtIndex(indexPath.row) as String
            //delete all rows in core data with this item name
         }
    }

How to delete all rows in Core Data which have field name "itemName" ?

Answer 1

Create an NSFetchRequest and set an NSPredicate with your item name. Executing this fetch request gives you an array of all NSManagedObjects with that predicate.

Then iterate over that array and call the NSManagedObjectContext 's method deleteObject(object)

let fetchRequest = NSFetchRequest(entityName: "yourEntityName")
fetchRequest.includesSubentities = false
fetchRequest.returnsObjectsAsFaults = false

fetchRequest.predicate = NSPredicate(format:"name == '\(itemName)'")

var error: NSError?

// moc is your NSManagedObjectContext here
items = moc.executeFetchRequest(fetchRequest, error: &error)!

for item in items {
    moc.deleteObject(item)
}

Answer 2

try this

  if let index = find(items, items.objectAtIndex(indexPath.row))

              {
                 items.removeAtIndex(index)

              }