How can I replace text in UITextView with NSUndoManager support?

Question

I want to be able to replace some text in an UITextView programatically, so I wrote this method as an UITextView category:

- (void) replaceCharactersInRange:(NSR         


        

Answer 1

After having stumbled over this issue and getting grey hair of it, I finally found a satisfying solution. It's a bit tacky, but it DOES work like a charm. The idea is to use the working copy&paste support that UITextView offers! I think you might be interested:

- (void)insertText:(NSString *)insert
{
    UIPasteboard *pboard = [UIPasteboard generalPasteboard];

    // Clear the current pasteboard
    NSArray *oldItems = [pboard.items copy];
    pboard.items = nil;

    // Set the new content to copy
    pboard.string = insert;

    // Paste
    [self paste: nil];

    // Restore pasteboard
    pboard.items = oldItems;
    [oldItems release];
}

EDIT: Of course you can customize this code to insert text at any position in the text view. Just set the selectedRange before calling paste.