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PONSURLConnection returns data but I cannot read it
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  1. PONSURLConnection returns data but I cannot read it
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    copied!<p>This is another simple question who'se answer escapes me after a hour on Google...</p> <p>A user is typing something into a text field and upon this field loosing focus, I launch an NSURLConnection....</p> <pre><code>NSString *usernameTry = [sender text]; NSLog(@"username field = %@",usernameTry); NSString *content = [@"http://www.siebenware.de/Rhythm/user/checkusername.php?username=" stringByAppendingString:usernameTry]; content = [content stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:content] cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:5.0]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [connection start]; NSLog(@"%@",content); </code></pre> <p>Then I wait for the response....</p> <pre><code>- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@"Received Response"); if ([response isKindOfClass:[NSHTTPURLResponse class]]) { NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response; int status = [httpResponse statusCode]; if (!((status &gt;= 200) &amp;&amp; (status &lt; 300))) { NSLog(@"Connection failed with status %@", status); [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } } } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { [resultsData appendData:data]; NSString *resultsString = [[NSString alloc] initWithData:resultsData encoding:NSUTF8StringEncoding]; NSLog(@"received data %@ %i",resultsString,[resultsString length]); if ([resultsString isEqualToString: @"FAIL"]){ NSLog(@"failed to retrieve data"); }else{ resultsObjects = [[resultsString componentsSeparatedByString:@":"] mutableCopy]; if([resultsObjects objectAtIndex:0]==@"usernamecheck"){ if ([resultsObjects objectAtIndex:1]==username.text) { if ([resultsObjects objectAtIndex:2]==@"NG"){ //set the check marker to bad [usernameVer setImage:[UIImage imageNamed:@"redcross.png"]]; }else{ //set the check market to good [usernameVer setImage:[UIImage imageNamed:@"greentick.png"]]; } } } } } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog([NSString stringWithFormat:@"Connection failed: %@", [error description]]); UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:@"Unable to retrieve data" message:[NSString stringWithFormat:@"Error code %i",[error code]] delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; } </code></pre> <p>I see the response arrive in didReceiveResponse and am getting 18 bytes of data (which is correct).</p> <p>However didReceiveData says that the 'data' is null. I know I am missing something exceptionally simple, and I promise to kick myself once this is cleared up.</p> <p>Regards Chris H</p>
 

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