> On Feb 14, 2017, at 1:24 PM, Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > On Feb 14, 2017, at 00:26 , Daryle Walker <dary...@mac.com > <mailto:dary...@mac.com>> wrote: >> >> But I can’t call the “super” versions of those other initializers from >> within my override. > > This is the essence of your problem. Your “override” cannot be a convenience > initializer because convenience initializers cannot call “up” to the > superclass, and it cannot be a designated initializer because designated > initializers cannot call convenience initializers. For one solution, see here: > > > http://stackoverflow.com/questions/38908902/overwriting-nsdocuments-initcontentsofoftype-in-swift > > <http://stackoverflow.com/questions/38908902/overwriting-nsdocuments-initcontentsofoftype-in-swift> > > Answering the same question in another way, look at the comments for > init(type:) in the NSDocument header file: > >> "Initialize a new empty document of a specified type, and return it if >> successful. If not successful, return nil after setting *outError to an >> NSError that encapsulates the reason why the document could not be >> initialized. The default implementation of this method just invokes [self >> init] and [self setFileType:typeName].” > > > This tells you exactly what the superclass convenience initializer does, and > the fact that it’s in the header file makes the behavior a public API > contract. So, you are allowed to implement your own subclass convenience > initializer (that throws) which does *not* invoke super, but simply does what > the super method is documented to do. (That’s basically the solution given on > Stack Overflow.)
This is what I did; repeat the three initializers. Apple’s code will call my versions instead of the ones in NSDocument, right? The given notes don’t say how to get the modification date, but I got it from the StackOverflow article you mentioned. For the initializer that can take a “URL?” for a decoy file, which modification date are you supposed to use? My code uses “(urlOrNil ?? contentsURL)” to decide. Is that right? — Daryle Walker Mac, Internet, and Video Game Junkie darylew AT mac DOT com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
