Re: How to cancel a loading document in NSDocument's readFromURL:ofType:error method ?
Re: How to cancel a loading document in NSDocument's readFromURL:ofType:error method ?
- Subject: Re: How to cancel a loading document in NSDocument's readFromURL:ofType:error method ?
- From: Mike Abdullah <email@hidden>
- Date: Thu, 09 Feb 2012 22:53:47 +0000
On 9 Feb 2012, at 20:23, Gilles Celli wrote:
> Mike, Kyle,
>
> Thanks for the quick answers!
>
> Yes I'm targeting Mac OS X 10.6 and later so canConcurrentlyReadDocumentsOfType: is a welcome addition, I completely forgot that.
>
> Strangely if I put the method canConcurrentlyReadDocumentsOfType: inside my NSDocument I get a warning when trying to open a document (It seems to be a QuickLook error ?) on Mac OS X 10.7.3:
>
> [QL] QLError(): +[QLSeamlessDocumentOpener seamlessDocumentOpenerForURL:] should only be called in the main thread
Maybe try setting a breakpoint on QLError to see when it gets called?
>
> Now for the cancel question: If I take the more traditional approach to cancel the operation inside readFromURL, should I fire up a new thread to check the flag's status ?
What would this gain you? You set the cancel flag on the main thread. And you have a worker thread for reading the document supplied by the system, so why add another thread to the mix?
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