On Aug 4, 2010, at 20:18, Quincey Morris wrote:

> On Aug 4, 2010, at 19:48, Gideon King wrote:
> 
>> 1. User initiates import of file of type "fred"
>> 2. I pick that up in -readFromURL:ofType:error:, and spawn a process which 
>> converts files of type "fred" to type "myfiletype", the native file type of 
>> the application. Let's say that it is stored in a file called 
>> /MyImports/file.mytype.
>> 3. Still in -readFromURL:ofType:error:, I call super, telling it to load the 
>> converted file, and then call [self setFileURL:nil]; [self 
>> setFileType:@"myfiletype"];
> 
> I don't have any answers, but I was going to contribute some questions, then 
> I realized that I don't quite understand the above. Apologies if you 
> explained this in your original post.
> 
> What's the mechanism that gets to step 1 in the above -- File | New? File | 
> Open? File | Import? (Meaning, by the first two, the standard actions that 
> get dispatched to NSDocumentController.)
> 
> I assumed, from your statement that readFromURL:ofType:error: is invoked, 
> that this was coming from a File | Open of the file to be converted. Is the 
> file needing conversion a Core Data store? Or a non-Core Data file of some 
> kind? (If the latter, I'm not sure why you think its safe to use 
> NSPersistentDocument.)

One other preliminary question:

Am I correct in assuming that the intention of setting fileURL to nil is to (in 
effect) make the imported document untitled, so that the user will be asked for 
a location to save it, at the next save?


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