How to add data for NSOutputStream? - objective-c

Question

I want to convert a UIImage to an NSOutputStream and send it to a server through socket.
#import "Connection.h"
#implementation Connection
-(void) open: (NSString *) h : (int) p
{
strHost = h;
intPort = p;
[NSStream getStreamsToHost:objHost
port:intPort
inputStream:&receiveStream
outputStream:&sendStream];
[receiveStream retain];
[sendStream retain];
[receiveStream setDelegate:self];
[sendStream setDelegate:self];
[receiveStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[sendStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[receiveStream open];
[sendStream open];
printf("Open.\n");
}
- (void) stream: (NSStream *) stream handleEvent: (NSStreamEvent) eventCode
{
printf("EVENT: Start.\n");
switch(eventCode)
{
case NSStreamEventOpenCompleted:
{
printf("EVENT: Open completed.\n");
if(stream == receiveStream)
{
printf("Receiving...\n");
}
if(stream == sendStream)
{
printf("Sending...\n");
NSString * strBuffer = [NSString stringWithFormat:#"GET / HTTP/1.0\r\n\r\n"];
const uint8_t * rawstring = (const uint8_t *)[strBuffer UTF8String];
[sendStream write:rawstring maxLength:strlen(rawstring)];
}
break;
}
case NSStreamEventEndEncountered:
{
printf("EVENT: End encountered.\n");
break;
}
case NSStreamEventHasSpaceAvailable:
{
printf("EVENT: Has space available.\n");
break;
}
case NSStreamEventHasBytesAvailable:
{
printf("EVENT: Has bytes available.\n");
break;
}
case NSStreamEventErrorOccurred:
{
printf("EVENT: Error occurred.\n");
break;
}
case NSStreamEventNone:
{
printf("EVENT: None.\n");
break;
}
}
printf("EVENT: End.\n");
}
-(void) close
{
[receiveStream close];
[sendStream close];
printf("Closed.\n");
}
#end
My question is where can I add code like "sendStream = ..."?
Another question is that I can convert UIImage to NSData using:
NSData *imageData = UIImageJPEGRepresentation(imageView.image, 90);
But how to convert the imageData to NSOutputStream's instance?

Answer 1

My question is where can I add code like "sendStream = ..."?
You're already assigning sendStream with the getStreamsToHost:port:inputStream:outputStream: message. That method returns the two streams by reference.
… how to convert the imageData to NSOutputStream's instance?
You don't need to convert the data to a stream, you need to tell a stream to write the data.
Try NSOutputStream's write:maxLength: method. You'll need to pass the bytes and length from the data object.