Steve,
Can you run an NSOpenPanel with a completion handler block, and in that block,
call a method on a background thread to actually perform the file read
operation?
As a test, I put this together. I called the selectAFile method and chose a 4GB
text file. The open panel was dismissed after about a second, the file read
completed after four seconds:
-(void)selectAFile
{
// Get and configure an open panel.
NSOpenPanel * myOpenPanel = [NSOpenPanel openPanel];
[myOpenPanel setCanChooseDirectories:NO];
[myOpenPanel setAllowedFileTypes:[NSArray arrayWithObject:@"txt"]];
// Run the panel.
[myOpenPanel beginWithCompletionHandler:^(NSInteger result)
{
if (result==NSFileHandlingPanelOKButton)
{
// User clicked OK, do the actual file read in a background thread.
[self performSelectorInBackground:@selector(openAFileURL:)
withObject:myOpenPanel.URL];
}
}];
}
-(void)openAFileURL:(NSURL *)aFileURL
{
// Read the contents of the file at aFileURL into a string.
NSString * fileString = [NSString stringWithContentsOfURL:aFileURL
encoding:NSUTF8StringEncoding error:nil];
// Log the result.
if (fileString) {
NSLog(@"Successfully read file: %@", [aFileURL lastPathComponent]);
} else {
NSLog(@"Could not load file: %@", [aFileURL lastPathComponent]);
}
}
--
Bryan Vines
On Aug 12, 2013, at 6:27 PM, "Mills, Steve" <smi...@makemusic.com> wrote:
> I haven't been able to find any info about this, but I might be searching for
> the wrong thing. How can we get rid of the Open dlog so it doesn't hang
> around while the document is being read? It's an incredibly annoying design.
>
> Steve via iPad
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