Implementing next threading solutions in Swift / Objective-C

Question

I started to learn programming for iOS and I want to find out how to implement next Java functions with threads in Swi

Answer 1

For 2, I would use serial queue:

dispatch_queue_t myQueue;

And implement my queue as of below:

myQueue = dispatch_queue_create("my_serial_queue", DISPATCH_QUEUE_SERIAL);

dispatch_async(myQueue, ^{
    for (int i = 0; i < 10000; i++) {
        usleep(100);
    }
    NSLog(@"Task 1 done");
});

dispatch_async(myQueue, ^{
    NSLog(@"Task 2 done");
});