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

The performSelector: family has its limitations. Here is the closest setTimeout equivalent:

dispatch_time_t delay = dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC * 0.5); dispatch_after(delay, dispatch_get_main_queue(), ^(void){     // do work in the UI thread here }); 

EDIT: A couple of projects that provide syntactic sugar and the ability to cancel execution (clearTimeout):

• https://github.com/Spaceman-Labs/Dispatch-Cancel
• https://gist.github.com/zwaldowski/955123