Objective C equivalent to javascripts setTimeout?

Question

I was wondering whether there is a solution to raise an event once after 30 seconds or every 30 seconds in CocoaTouch ObjectiveC.

Answer 1

Take a look at the NSTimer class:

NSTimer *timer;
...
timer = [[NSTimer scheduledTimerWithTimeInterval:30.0 target:self selector:@selector(thisMethodGetsFiredOnceEveryThirtySeconds:) userInfo:nil repeats:YES] retain];
[timer fire];

Somewhere else you have the actual method that handles the event:

- (void) thisMethodGetsFiredOnceEveryThirtySeconds:(id)sender {
   NSLog(@"fired!");
}