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POMethod gets called two times
 

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  1. POMethod gets called two times
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    <p>I am doing a NSURLConnection that downloads a file only if there is a new one (checked with the last-modified date). But to accomplish this I am using two methods with two different NSURLRequests and NSURLConnection. Well, they do the same. </p> <pre><code> - (IBAction)uppdatera:(id)sender { checkHeaders = YES; NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.forellgatan.se/site/ftp_files/Kapareskolan.zip"] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.0]; NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { self.receivedData = [[NSMutableData data] retain]; } else { UIAlertView *connectFailMessage = [[UIAlertView alloc] initWithTitle:@"Ingen internetanslutning! 1" message:@"Anslut dig till internet för att ladda ner!" delegate: self cancelButtonTitle:@"Ok" otherButtonTitles: nil]; [connectFailMessage show]; [connectFailMessage release]; } } - (void)downloadNewFile { NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.forellgatan.se/site/ftp_files/Kapareskolan.zip"] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10.0]; NSURLConnection *theConnection2 = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection2) { self.receivedData = [[NSMutableData data] retain]; } else { UIAlertView *connectFailMessage = [[UIAlertView alloc] initWithTitle:@"Ingen internetanslutning! 2" message:@"Anslut dig till internet för att ladda ner!" delegate: self cancelButtonTitle:@"Ok" otherButtonTitles: nil]; [connectFailMessage show]; [connectFailMessage release]; } checkHeaders = NO; self.progressView.hidden = NO; } </code></pre> <p>It goes through the didReceiveResponse method:</p> <pre><code>- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { if (checkHeaders == YES) { NSHTTPURLResponse *test = (NSHTTPURLResponse *)response; if ([test respondsToSelector:@selector(allHeaderFields)]) { NSDictionary *metaData = [test allHeaderFields]; NSString *lastModifiedString = [metaData objectForKey:@"Last-Modified"]; NSString *savedString = [[NSUserDefaults standardUserDefaults] stringForKey:@"LastModified"]; if (![lastModifiedString isEqualToString:savedString]) { [self downloadNewFile]; } else if ([lastModifiedString isEqualToString:savedString]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Ingen uppdatering tillgänglig" message:@"Det finns ingen uppdatering att hämta just nu." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil]; [alert show]; [alert release]; } NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults]; [standardUserDefaults setObject:lastModifiedString forKey:@"LastModified"]; [standardUserDefaults synchronize]; } } [self.receivedData setLength:0]; self.fileSize = [[NSNumber numberWithLong: [response expectedContentLength]] retain]; } </code></pre> <p>Last the connectionDidFinishLaunching method:</p> <pre><code> - (void)connectionDidFinishLoading:(NSURLConnection *)connection { if (checkHeaders == NO) { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *basePath = ([paths count] &gt; 0) ? [paths objectAtIndex:0] : nil; [self.receivedData writeToFile:[basePath stringByAppendingPathComponent:@"Kapareskolan.zip"] atomically:YES]; [self unzipDownloadedFile]; self.progressView.hidden = YES; NSLog(@"Finished..."); } [connection cancel]; } </code></pre> <p>I know the didFinishLaunching method gets called twice, but I want to know how I could get so the method doesn't get called twice if there is an update?</p> <p>I know it's a lot asked and much code here but just give me a hint and I'll be very thankful. </p>
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