How to properly open and close a NSStream on another thread

问题

I have an application that connects to a server using NSStream on another thread. The application also closes the connection should the user decide to log out. The problem is that I am never able to successfully close the stream or the thread upon having the user disconnect. Below is my code sample on how I approach creating a thread for my network and trying to close the stream:

+ (NSThread*)networkThread
{
    static NSThread *networkThread = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        networkThread = [[NSThread alloc] initWithTarget:self selector:@selector(networkThreadMain:) object:nil];

        [networkThread start];
    });

    return networkThread;
}

+ (void)networkThreadMain:(id)sender
{
    while (YES)
    {
        @autoreleasepool {
            [[NSRunLoop currentRunLoop] run];
        }
    }
}

- (void)scheduleInThread:(id)sender
{
    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
    [inputStream open];
}

- (void)closeThread
{    
    [inputStream close];
    [inputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
    [inputStream release];
    inputStream = nil;
}

Call made when trying to connect the inputstream:

[self performSelector:@selector(scheduleInThread:) onThread:[[self class] networkThread] withObject:nil waitUntilDone:YES];

Any advice is greatly appreciated.

来源：https://stackoverflow.com/questions/10980874/how-to-properly-open-and-close-a-nsstream-on-another-thread