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PONSTask waitUntilExit hanging app on jailbroken iOS
 

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    <p>So I've got NSTask to run a script which generates a list of something, into a txt, which I read from. But if I use my current code (below), the alert pops up before the NSTask is finished, thus resulting in a blank alert. I've tried <code>waitUntilExit</code> but that makes the button that invokes this action freeze, but the UI doesn't lock up itself.</p> <pre><code>- (void) runSupported { stask = [[NSTask alloc] init]; [stask setLaunchPath:@"/bin/bash"]; NSString *script; script = [[[NSBundle mainBundle] bundlePath] stringByAppendingString:@"/apps.sh"]; NSArray *sargs = [NSArray arrayWithObjects:script, @"-txt", nil]; [stask setArguments: sargs]; [stask launch]; NSString *apps; apps = [NSString stringWithContentsOfFile:@"/var/mobile/supported.txt" encoding:NSUTF8StringEncoding error:nil]; NSFileManager *fm = [NSFileManager defaultManager]; if ([fm fileExistsAtPath:apps]) { UIAlertView *supported = [[UIAlertView alloc] initWithTitle:@"App List" message:apps delegate:self cancelButtonTitle:@"Ok!" otherButtonTitles:nil]; [supported show]; [supported release]; } else { UIAlertView *supported = [[UIAlertView alloc] initWithTitle:@"App List" message:@"Error generating list." delegate:self cancelButtonTitle:@"Ok!" otherButtonTitles:nil]; [supported show]; [supported release]; } } </code></pre> <p>Any idea how I'd have the NSTask finish before invoking the alert? Thanks.</p> <p>Edit: Code with NSNotification:</p> <pre><code>-(IBAction) supported { stask = [[NSTask alloc] init]; [stask setLaunchPath:@"/bin/bash"]; NSString *script; script = [[[NSBundle mainBundle] bundlePath] stringByAppendingString:@"/apps.sh"]; NSArray *sargs = [NSArray arrayWithObjects:script, @"-txt", nil]; [stask setArguments: sargs]; [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(taskEnded:) name: NSTaskDidTerminateNotification object: nil]; [stask launch]; } - (void)taskEnded:(NSNotification *)notification { if (stask == [[notification object] terminationStatus]) { NSString *apps; apps = [NSString stringWithContentsOfFile:@"/var/mobile/supported.txt" encoding:NSUTF8StringEncoding error:nil]; NSFileManager *fm = [NSFileManager defaultManager]; if ([fm fileExistsAtPath:apps]) { UIAlertView *supported = [[UIAlertView alloc] initWithTitle:@"Apps" message:apps delegate:self cancelButtonTitle:@"Ok!" otherButtonTitles:nil]; [supported show]; [supported release]; } else { UIAlertView *supported = [[UIAlertView alloc] initWithTitle:@"Apps" message:@"Error generating list." delegate:self cancelButtonTitle:@"Ok!" otherButtonTitles:nil]; [supported show]; [supported release]; } } else { NSLog(@"Task failed."); } } </code></pre>
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    1. USRowland Shaw
    1. USMitochondria
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      1. VTUpMod
    1. COWhat plateform are you targeting, iPhone or Mac? NSTask is not allowed on iOS, and UIAlertView does not exists on Mac.
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      1. USGuillaume
    2. COiOS. Jailbroken, to be exact.
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      1. USMitochondria
 

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