Undo/redo with a UITextView (iOS/iPHone)

Question

I have a view where a UITextView always has focus. What I want to do is extend the built-in undo/redo behavior to support undo/redo for when I programmatically set the text

Answer 1

OK, figured it out:

The issue with #1 is as outlined in the update to my original post.

Issues #2 and #3 were just me using the NSUndoManager incorrectly. My final unClear method (which gets called on undos is as follows:

-(void)undoClear:(NSString *)textToRestore
{   
    NSString *textBackup = [self.myTextView.text copy];

    self.myTextView.text = textToRestore;

    if ([self.myTextView.undoManager isUndoing])
    {
        // Prepare the redo.
        [[self.myTextView.undoManager prepareWithInvocationTarget:self] undoClear:@""];     
    }
    else if ([self.myTextView.undoManager isRedoing])
    {
        [[self.myTextView.undoManager prepareWithInvocationTarget:self] undoClear:textBackup];
    }

    [textBackup release];
}

It's working as it should now.