Question

I have a requirement that when application install on device then it will never show any screen and start a thread in background for 30 seconds. When complete that time then it will show a screen in application.

I mean to say that when we install an application on device then it show a Black Screen for a moment and read

applicationDidFinishLaunching

after that it will don’t show any screen. And in background we have start a thread for 30 seconds when that time period will complete then it will show a new view.

How do that? what is proper way to do that?

Thanks in advance

Answer 1

When your app installs on device as per my understanding there is no way your app can start a background thread. You app is not active in the first place.

Once your app is invoked by the user, then you can start a background thread & do what needs to be done. Best way to start background threads in iOS is blocks –

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    //do background task
    dispatch_async(dispatch_get_main_queue(), ^{
        // update UI after task is done.
    });
});

This block based threading is perfect as GCD takes care of evenly distributing your task in case of multi-core processors, queuing tasks, memory handling of threads etc. all of this is handled for you.