How to create a new instance of an NSDocument with NSDocumentController?

Question

I tried

[[NSDocumentController sharedDocumentController] duplicateDocumentWithContentsOfURL:nil
                                                                            copying:NO
                                                                        displayName:nil
                                                                              error:NULL] ;

but it is not working. I have the error

typeForContentsOfURL:error: must be overridden for your application to support non-'file:' URLs.

Answer 1

Did you try like this below:-

   [[NSDocumentController sharedDocumentController]newDocument:self];