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
    })
}