Re: Threading - How its done?
Re: Threading - How its done?
- Subject: Re: Threading - How its done?
- From: John Calhoun <email@hidden>
- Date: Tue, 6 May 2008 17:43:08 -0700
On May 6, 2008, at 4:51 PM, Karl von Moller wrote:
Does anyone know whether there is a way to get progress info from a
PDF loading into a view - percentage/bytes loaded for example?
No, I can think of no way to do this.
Be careful with threading and PDF... PDFKit classes are ultimately
based on CFPDFDocumentRef and CGPDFPageRef — these are not thread
safe. You cannot for example search for text in a PDFDocument while
rendering a PDFPage from that same PDFDocument. Or even render two
different PDFPages from the PDFDocument.
You can however have several CGPDFDocumwentRefs that point to the same
underlying file/data working on separate threads. You want separate
PDFDocument objects though:
PDFDocument *mainPDFDocument = [[PDFDocument alloc] initWithUR:
someURL];
PDFDocument *threadPDFDocument = [[PDFDocument alloc] initWithUR:
someURL];
Note, same URL, different PDFDocument instance.
John Calhoun—_______________________________________________
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