Re: accessing newly-created files
Re: accessing newly-created files
- Subject: Re: accessing newly-created files
- From: "Louis C. Sacha" <email@hidden>
- Date: Thu, 15 Apr 2004 14:08:29 -0700
Hello...
Perhaps something like the following would work?
NSImage *theImage = nil;
while (!theImage)
{
[NSThread sleepUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.01]];
theImage = [[NSImage alloc]
initWithContentsOfFile:@"/the/path/to/the/file.img"];
}
Note that if you use the sleepUntilDate: method on the main thread
continuously (or with a long time interval) you will get the spinning
beachball cursor.
Hope that helps,
Louis
I use a system call to execute a program which creates an image file
that I want to display directly after it is written. For some
reason, it seems to tell the OS to write the file, and then it
returns before the file is actually written. So when my next call
attempts to read the file, I get an error. I got around this by
calling the standard C sleep function; however, sleep only takes
increments of seconds. 1 second was plenty of time for the ~30K file
to be written, but I'd rather not wait that long, and it's not a
good way of handling things. Rather, I would like to perform a check
for the status of the file to make sure it's all there before
attempting a read operation. Is there a way to do this?
David
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