cocoacore-datainterface-buildernsarraycontrollernssegmentedcontrol

Using NSSegmentedControl with CoreData

I have a Core Data app that works to add or remove one of a Client's many Appointments with buttons bound in IB to my appointments ArrayController. The appointments content is derived from whichever Client is selected in a feed list. I wish to use a SegmentedControl, and as far as I could tell, this requires I programmatically add and remove the objects in appointments. I have successfully managed to add an Appointment using Marcus Zarra’s code from his book Core Data on p54, but I am at a loss to remove a selected Appointment. I am using a custom table cell, which I suspect might be complicating matters.

In short, I wish to programmatically achieve the equivalent of an ArrayController’s remove: method on a selected object.

Can anyone help, please?

Solution

  • Get the current selection from you ArrayController bound to your UI

    - (NSArray *)selectedObjects

    delete those objects using the context 

    -(void) deleteObject:(NSManagedObject*) object

    Sample:

    NSArray* objectsToDelete = [NSArray arrayWithArray:[arrayController selectedObject]];
for (NSManagedObject* objectToDelete in objectsToDelete)
{
  [arrayController.managedObjectContext deleteObject:objectToDelete];
}