Comments on: Drag and Drop Rearranging in Table Views with Core Data

By: Metadata | Core Data Framework – z czym to się je?

Metadata | Core Data Framework – z czym to się je? — Mon, 15 Mar 2010 21:42:52 +0000

[...] Building Core Data Application Cocoa for Scientists: iTunes-ifying a Core Data App Drag and Drop Rearranging in Table Views with Core Data [...]

By: Tobidobi

Tobidobi — Fri, 12 Feb 2010 09:51:32 +0000

Great article, Tim. Thank you!

By: admin

admin — Fri, 29 Jan 2010 14:35:06 +0000

Thanks, Glen; I now remember that I found the bug shortly after posting the code and completely forgot to update it.

Quite a lot going on recently, but normal service should be resumed again soon

By: Glen Harding

Glen Harding — Thu, 28 Jan 2010 21:27:13 +0000

Thanks for this, it saved me a huge amount of time. But I had a small problem when moving items at the beginning of the table backwards. For example: an item at the start of the list with viewPosition=0, and moving it back to position 3 – where my table has 5 items in it.

This would cause the viewPosition sequence to skip a number – 0,1,2,4,5. This problem in turn actually stops you from dragging an item to the end of the table. In my case with 5 items, dragging the item to the end of the list in the table would only ever put it 2nd last.

The way I got around this was to make a simple change in tableView:acceptDrop

change

tempRow = row;
to
tempRow = row – 1;

Hope this helps anybody else experiencing this little problem.

But many thanks again for this post – can’t tell you how much work it saved

By: Ellie

Ellie — Mon, 07 Dec 2009 05:54:56 +0000

Thanks for the clear post! This was very helpful.

By: Andrew Greaney

Andrew Greaney — Sat, 29 Aug 2009 18:08:06 +0000

Being very new to Core Data, I found this tutorial very helpful.

One problem I came across was I want to use this in a non-document based Core Data Application.

Could you explain what changes need to be made?

Thanks.

By: Simon Strandgaard

Simon Strandgaard — Sat, 15 Aug 2009 22:36:17 +0000

Reordering rows inside a table. It sounds like something that NSTableView can do out of the box, just by setting a value to YES somewhere, so I wasn’t sure where to begin. Your article shed light on this. Thank you for writing such a verbose article.

By: Mark Knopper

Mark Knopper — Tue, 28 Jul 2009 19:40:56 +0000

Thanks for posting this. It was great to find specific instructions with code on how to do drag & drop for rearranging rows in a table view. I was able to use it in my app and it works fine.

By: Technoboria » links for 2009-04-16

Technoboria » links for 2009-04-16 — Thu, 16 Apr 2009 17:46:25 +0000

[...] Drag and Drop Rearranging in Table Views with Core Data | Blog @ Tim Isted "More core data fun. Trying to get a table with drag-and-drop reordering working myself, so this will help no end. There is very little information on this stuff out there." [...]

By: Jonathan Sterling

Jonathan Sterling — Sat, 21 Feb 2009 19:03:14 +0000

Great guide. I don’t know if it is my fault, but there is one problem. When I drag items, they don’t drag to the place I tell them to. How do I solve this problem?