> On 5 Feb 2016, at 16:10, Keary Suska <cocoa-...@esoteritech.com> wrote: > > >> On Feb 5, 2016, at 8:45 AM, Dave <d...@looktowindward.com> wrote: >> >> Hi All, >> >> I have written a Test App that demonstrates the problem, please let me know >> if you’d like a copy. >> >> I’m not sure if its a bug or not and if not a bug then how to make it work. >> Everyone keeps telling me its possible but no one seems to know how to make >> it work. >> >> According to the (few) docs I found on it, its possible too, but again it >> doesn’t actually tell you how to do it. >> >> I’ll use up a DTS incident on this but they will take forever to respond and >> I jwish I knew for certain whether this is *SUPPOSED* to work or not. It >> doesn’t actually say in black and white one way or the other. > > I would like to see a copy, as I am curious why it isn’t working. The issue > isn’t that no-one knows how, it is that it is simply supposed to work. There > shouldn’t be anything you need to do to encode a complex graph. > > However, I can see that *decoding* the graph could be difficult. The decoding > of any single object happens in the -initWithCoder: implementation of that > object. One would think that until that method is exited, NSCoder cannot know > that the object exists. Therefore If any of its child objects reference it, > how can the coder know which object to use? I don’t know how, or if, > NSKeyedUnarchiver handles this situation.
It works now. It handles it by doing at least two passes. The first pass it creates a dictionary of all “Unique” Objects, and then on the second pass substitutes references to keys in the dictionary……. > You may have to handle it yourself—i.e. do not encode “parent” properties and > instead set the property value in the parents’ -initWithCoder:. I knew it would handle it, I just thought there was some magic you had to somehow provide, but this “magic” is provided by the Archiver/Unarchiver *if* you don’t inadvertently break the self-referential nature of the original network. All the Best Dave _______________________________________________ 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
