Quick and dirty debug timer

For those occasions when you need to check something some state at regular intervals.

Just drop this snippet at the top of your file:

static dispatch_source_t timer;
void DebugTimer(dispatch_block_t block)
{
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    double interval = 1;
    timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
    dispatch_source_set_timer(timer, dispatch_time(DISPATCH_TIME_NOW, (int64_t)interval * NSEC_PER_SEC), (int64_t)interval * NSEC_PER_SEC, (1ull * NSEC_PER_SEC) / 10);
    dispatch_source_set_event_handler(timer, block);
    dispatch_resume(timer);
}

And then call this procedure, for example, in viewDidLoad:

DebugTimer(^{
    NSLog(@"What is wrong with you? %@", vipView);
});

Remember, this is just for debugging purposes.