Socket connection stream opened called two times - iphone

Question

I have implemented socket connection in my project and it is working fine.
But my problem is that I want to send a string request on opening completion of socket.
Delegate is working fine.
- (void)initNetworkCommunication
{
lastString=#"";
isSocketAuthorized=NO;
NSLog(#"$$$$$$$$$$$$$$$$$$$$$$$$$============socket connection INITIALISED....");
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;
CFStreamCreatePairWithSocketToHost(NULL,(CFStringRef)#"XXX.XX.XXX.XX",XXXX, &readStream, &writeStream);
inputStream = (__bridge NSInputStream *)readStream;
outputStream = (__bridge NSOutputStream *)writeStream;
[inputStream setDelegate:self];
[outputStream setDelegate:self];
[inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream open];
[outputStream open];
}
- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
switch (eventCode) {
case NSStreamEventOpenCompleted:{
NSLog(#"Stream opened");
[self performSelectorInBackground:#selector(sendAuthRequest) withObject:nil];
}
break;
case NSStreamEventHasBytesAvailable:
{
if (aStream == inputStream) {
uint8_t buffer[1024];
int len;
while ([inputStream hasBytesAvailable]) {
len = [inputStream read:buffer maxLength:sizeof(buffer)];
if (len > 0) {
NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSASCIIStringEncoding];
if (nil != output) {
// NSLog(#"server said: %#", output);
[self messageReceived:output];
}
}
}
}
}
break;
case NSStreamEventErrorOccurred:
NSLog(#"Can not connect to the host!");
break;
case NSStreamEventEndEncountered:
{
[aStream close];
[aStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
}
break;
default:
NSLog(#"Unknown event");
}
}
But stream open is called twice.Why so? can anyone help me.
Thanks.

Answer 1

After a long time of spending my brain over the problem , I come to know that I am actually calling open stream two times.First time for Input Stream and second time for Output Stream.And at last I got the solution to fire my method once in a no of event called,I used condition for NSStream class kind.
case NSStreamEventOpenCompleted:{
if ([aStream isKindOfClass:[inputStream class]]) {
NSLog(#"Input stream opened");
}else{
NSLog(#"output stream opened");
[self performSelectorInBackground:#selector(sendAuthRequest) withObject:nil];
}
}