Re: FSCopyAsync Example + Updating UI
Re: FSCopyAsync Example + Updating UI
- Subject: Re: FSCopyAsync Example + Updating UI
- From: Mike Abdullah <email@hidden>
- Date: Mon, 23 Oct 2006 13:53:04 +0100
OK, it's actually fairly simple to do this in reality Mark. I've got
part of my app up and running doing what you want, mainly due to
various other bits of help from people on this list.
OK, so first you need a callback function, something like:
static void MAFileOperationAsyncCallback(FSFileOperationRef fileOp,
const FSRef *currentItem,
FSFileOperationStage stage,
OSStatus error,
CFDictionaryRef statusDictionary,
void *info)
To start the copy, use the FSCopyObjectAsync function. You need to
feed it information about the source and destination FSRefs. Also,
specify your callback function and a callback interval - I find 0.5
works pretty well. Most importantly though, you need to supply with
that function a pointer to an object uniquely identifying that
particular operation.
Then, use something like this to actually schedule your callback
function:
FSFileOperationScheduleWithRunLoop(fileOpeRef,
[[NSRunLoop currentRunLoop] getCFRunLoop],
(CFStringRef)NSDefaultRunLoopMode);
After that you should be all set. In your callback function, use the
*info pointer to find the object identifying that particular copy
operation and call whatever methods you like in order to update a
progress bar.
The best thing of all is that you don't even have to run this in a
separate thread!
Mike.
On 23 Oct 2006, at 00:02, Mark Manes wrote:
Greetings,
I am looking for an example of how to properly implement
FSCopyAsync that allows me to update the status of the UI during
the callback. Clearly I can't call a method within the callback as
I don't have the objects necessary. I see people discuss the use of
NSRunLoop -- but I don't quite get it.
I'd love a working example that copied files and updated the
progress using NSProgressIndicator.
Seems like a pretty common thing that people might want to do--I am
sure it would benefit many of someone would take the time to show a
good example.
PS: I did see the Apple documetnation on FSCopyAsync and in fact I
have the code working that copies the files properly. I just want
to tell my user what is going on. :)
Many thanks in advance!
-mark=
Mark D. Manes
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