NSThread sleepfortimeinterval blocks main thread

Question

I want to simulate a communication with a server. As the remote server will have some delays I want to use a background thread that has on it

 [NSThr         


        

Answer 1

Swift:

let nonBlockingQueue: dispatch_queue_t = dispatch_queue_create("nonBlockingQueue", DISPATCH_QUEUE_CONCURRENT)
dispatch_async(nonBlockingQueue) {
    NSThread.sleepForTimeInterval(1.0)
    dispatch_async(dispatch_get_main_queue(), {
        // do your stuff here
    })
}

Answer 2

Try create a method in your thread class called sleepThread

-(void)sleepThread
{
   [NSThread sleepForTimeInterval:timeoutTillAnswer];
}

Then to make it sleep from your main thread

[self.botThread performSelector:@selector(sleepThread) onThread:self.botThread withObject:nil waitUntilDone:NO];

To send updated to your main thread from your bot thread.

dispatch_async(dispatch_get_main_queue(), ^{
    [MainClass somethinghasUpdated];
});

Side Note

To create the RunLoop I think all you need to do is

// Run the Current RunLoop
[[NSRunLoop currentRunLoop] run];

Answer 3

It blocks whatever thread sleepForTimeInterval is running on. Run it on another thread to simulate your server delay like this:

dispatch_queue_t serverDelaySimulationThread = dispatch_queue_create("com.xxx.serverDelay", nil);
dispatch_async(serverDelaySimulationThread, ^{
     [NSThread sleepForTimeInterval:10.0];
     dispatch_async(dispatch_get_main_queue(), ^{
            //Your server communication code here
    }); 
});