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PONSInputStream does not call Delegate (stream:handleEvent:)
 

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    <p>I searched the web for a long time...I didn't find an answer for my issue, so I decided to post here. I try to establish a connection to a NNTP-server using NSStream.</p> <p>In a test-program, I open the streams and send a message. The delegate-method (<code>stream:handleEvent:</code>) is called twice for the output-stream (<code>NSStreamEventOpenCompleted</code>, <code>NSStreamEventHasSpaceAvailable</code>) but <strong>never</strong> for the input-stream!</p> <p>Why does the input stream never call the delegate? Any ideas?</p> <p>Basically, the code looks like this:</p> <p>init and open streams:</p> <pre><code>CFReadStreamRef tmpiStream; CFWriteStreamRef tmpoStream; CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)SERVER, PORT, &amp;tmpiStream, &amp;tmpoStream); iStream = (__bridge NSInputStream *) tmpiStream; oStream = (__bridge NSOutputStream *)tmpoStream; [iStream setDelegate:self]; [oStream setDelegate:self]; [iStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [oStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [iStream open]; [oStream open]; </code></pre> <p>send message:</p> <pre><code>NSData *data = [[NSData alloc] initWithData:[messageString dataUsingEncoding:NSASCIIStringEncoding]]; [oStream write:[data bytes] maxLength:[data length]]; </code></pre> <p>receive messages:</p> <pre><code>-(void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode { NSLog(@"EventCode: %i", eventCode); //switch-case-statement...(using constants - NSStreamEventOpenCompleted...) } </code></pre> <p>The class which contains that code inherits from NSObjects and implements <code>NSStreamDelegate</code>. (iOS5 with ARC)</p> <p>Thx for any help!</p> <p>EDIT: I just tried "polling" after opening streams like this - it's working:</p> <pre><code>while (![iStream hasBytesAvailable]) {} uint8_t buffer[1024]; int len; NSString *str = @""; while ([iStream hasBytesAvailable]) { len = [iStream read:buffer maxLength:sizeof(buffer)]; if (len &gt; 0) { NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSISOLatin1StringEncoding]; if (output != nil) { str = [str stringByAppendingString:output]; } } } NSLog(@"Response: %@", str); </code></pre> <p>But, for sure, I still need a better (async) solution ;)</p>
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