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POexecution stops on [textView insertText:] without exception!
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copied!<p>I am writing a very simple OSX app. In this app, there is a main thread that keeps updating some stuff, then calculates some statistics and prints them on a textView.</p> <p>While developing, i used the same received IBAction to perform this cycle. I got it all working, then switched to NSThread to prevent the UI from locking while computing.</p> <p>As soon as i did that, the app started running very few cycles (about 7-8), then the whole app freezes without any exception. By debugging, i noticed that it freezes when trying to print statistics on the textView, and i have absolutely no clue about how to solve this. It works if not inside a thread... Anyone can help? Code below. Thanks in advance :)</p> <pre><code>-(IBAction) Evolve:(id)sender{ NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; [NSThread detachNewThreadSelector:@selector(Evolve) toTarget:self withObject:nil]; [pool drain]; } </code></pre> <p>And this is the whole cycle</p> <pre><code>-(void) Evolve{ NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; srandom(time(NULL)); //Tag 0: Minimo, Tag 1: Massimo int tagMinMax = [MinMax selectedTag]; //Tag 0: Rimpiazza sempre, Tag 1: Rimpiazza solo se migliori int tagRimpiazzo = [[Rimpiazzo selectedItem] tag]; int PopNum = [tf_popNum intValue]; int maxGen = [tf_maxGen intValue]; int target = [tf_targetVal intValue]; int chromosomeLength = [tf_chromosomeLength intValue]; Environment *env = [[Environment alloc] init]; NSMutableArray *pop = [[NSMutableArray alloc] init]; for (int i = 0; i < PopNum; i++) { [pop addObject:[[Individual alloc] initWithRandomGenesWithChromosomeLength:chromosomeLength]]; } [env setPopulation:pop]; [pop release]; BOOL earlyBestFound = NO; Individual *earlyBest = nil; int i=0; float best, avg; while (i<maxGen && !earlyBestFound) { NSLog(@"while"); NSArray *parents = [env selectParents]; NSLog(@"parents selected"); NSMutableArray *offspring = [[NSMutableArray alloc] init]; for (int i = 0; i < [parents count]; i+=2) { if (i+1<[parents count]) { NSLog(@"beginning SEX"); Individual *parent1 = [parents objectAtIndex:i]; Individual *parent2 = [parents objectAtIndex:i+1]; NSArray *children = [parent1 kCrossOverWithOtherIndividual:1 individual:parent2]; Individual *child1 = [children objectAtIndex:0]; Individual *child2 = [children objectAtIndex:1]; NSLog(@"children born"); if (tagRimpiazzo!=0) { if (([child1 fitness] > [parent1 fitness] && tagMinMax == 0)||([child1 fitness] < [parent1 fitness] && tagMinMax == 1)) { child1 = parent1; } if (([child2 fitness] > [parent2 fitness] && tagMinMax == 0)||([child2 fitness] < [parent2 fitness] && tagMinMax == 1)) { child2 = parent2; } } NSLog(@"Replacement happened"); [offspring addObject:child1]; [offspring addObject:child2]; } } NSLog(@"Calculating statistics"); avg = 0; for(Individual *X in offspring){ if (([X fitness] > best && tagMinMax == 1)||([X fitness] < best && tagMinMax == 0)) { best = [X fitness]; } avg += [X fitness]; if ([X fitness]==target) { earlyBestFound = YES; earlyBest = X; } } avg = avg/(float)PopNum; [env setPopulation:offspring]; NSLog(@"Releasing some memory"); [offspring release]; NSLog(@"Printing statistics"); NSString *toPrint = [NSString stringWithFormat:@"Fine generazione: %d avg: %.2f best: %.2f \r\n", i,avg,best]; [textView insertText:toPrint]; i++; } NSLog(@"Fine"); NSString *toPrint = [NSString stringWithFormat:@"Fine! best: %.2f - avg: %.2f \r\n", i,avg,best]; [textView insertText:toPrint]; [env release]; [pool drain]; } </code></pre> <p>P.S. Sorry if the english's not perfect, i'm italian :)</p>

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