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PO
 

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    <p>If you have a long text file to parse, the framework classes will take long time. You can't change that. And you can't change that they will never call back during work to tell you about their progress.</p> <p>Your only chance is to perform text file splitting on your own and set your progress as you dig yourself through your textfile. You can split a textfile with regular expressions. The "\w+" collect words with at least one character.</p> <p>If you set the progress bar in a heavy working method you have to give it some time to refresh the screen once in a while. See the "futuredate magic" below.</p> <p>Maybe the following can act as a starting point - in the code below the content of the text file is stored in the NSString "content".</p> <pre><code>NSError *error = NULL; NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"\\w+" options:NSRegularExpressionCaseInsensitive error:&amp;error]; [regex enumerateMatchesInString:content options:0 range:NSMakeRange(0, [content length]) usingBlock:^(NSTextCheckingResult *match, NSMatchingFlags flags, BOOL *stop){ // push one match to the dictionary [dictionary addObject:[content substringWithRange:match.range]]; // update the progress bar NSDate* futureDate = [NSDate dateWithTimeInterval:0.001 sinceDate:[NSDate date]]; [[NSRunLoop currentRunLoop] runUntilDate:futureDate]; self.progressbar.progress = (float) match.range.location/content.length; }]; </code></pre> <p>Note that the code is not optimized for speed. For example you should not update the progress bar with <em>every</em> token. Depending on how much tokens you have - count the detected ones and update the pgogress bar every 100 matches, or so...</p>
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    1. POHow to make UIProgressView to show progress of NSArray loading from file (iPhone)?
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    1. COI'm not sure if your solutinon makes sense. You posited that there exists `NSString *content` with the text file already loaded, but it doesn't. And creating it takes time I'd like to show with progress bar.
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    2. COOK. How "big" is your textfile? Mine loads 4MB in a splitsecond on the device. But the actual parsing takes 90% of the time.
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    3. COYou had the same starting situation: `NSString *filePath = [NSString stringWithContentsOfFile`. So I think showing progress is important not on loading. Try the solution. If also loading takes to long have a look at reading with streams as clarified [here](http://stackoverflow.com/questions/1044334/objective-c-reading-a-file-line-by-line?answertab=votes#tab-top). Good luck!
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