Disable NSUndoManager grouping invocations on document load

Question

NSUndoManager groups invocations together that happen in the same runloop.

I want to load a document that contains the undo history within it.

As such, I create a document and apply the invocations one-by-one, these however all get added very quickly, resulting in a single undo.

Is there a way I can change the NSUndoManagers runloop or something else so that I get separate undo invocations?

I have tried disabling groupsByEvent and creating my own beginUndoGrouping but it doesn't seem to work

It seems that I need to wrap a beginUndoGrouping() and endUndoGrouping() around all of my "add" operations, I'm not sure If I feel this is correct behaviour though. My thinking is that a top level beginUndoGrouping should affect all subsequent "adds" to the undo manager... — Chris, Jan 05 '15 at 22:11

score 1 · Answer 1 · answered Jan 05 '15 at 15:57

1

Have you tried closing the toplevel group and opening it again after you added your invocations? E.g.:

undoManager.endUndoGrouping()

// add your undo invocations

undoManager.beginUndoGrouping()

answered Jan 05 '15 at 15:57

lassej

There is no top level grouping to close, so I just get a crash with that method – Chris Jan 05 '15 at 21:15

1 Answers1