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Re: Copying large files with progress indicator
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Re: Copying large files with progress indicator


  • Subject: Re: Copying large files with progress indicator
  • From: Mike Abdullah <email@hidden>
  • Date: Tue, 1 Aug 2006 01:06:37 +0100

OK, that rather surprises me - why haven't Apple done a decent file copying system in Cocoa yet! Maybe I should file a request.

So, I downloaded MoreFilesX. It's readme says quite a bit about the HFD+ APIs. Am I right in thinking that the code will use the HFS+ if suitable, but that it will still work for non-HFS+ operations?

Assuming that this is OK, I've had a look at the command FSCopyFork - I assume that's the one you meant? However, I know very little of this Carbon style stuff and so I'm a little confused :(

The function requires a source reference number, a destination reference number, a copy buffer, and a copy buffer size.

I understand the first two and how to sort them out (I think!), but I haven't a clue where to start with the buffer stuff. Any chance you could nudge me in the right direction? I've googled around, but not found any examples yet.

Mike.

On 31 Jul 2006, at 18:32, Scott Ribe wrote:

So basically what I am asking is, what is the best strategy for
copying large files in Cocoa and providing full progress feedback and
the ability to cancel the operation?  (Without resorting to an NSTask
also!)

There really isn't a Cocoa option. You'd have to write a lower- level copy
function yourself, probably having it use performSelectorOnMainThread to
post updates back to the UI. Fortunately, the myriad details you'd need to
take care of when copying a file are handled in sample code. Look for
MoreFilesX, specifically FSCopyObject...


--
Scott Ribe
email@hidden
http://www.killerbytes.com/
(303) 722-0567 voice



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