How to Wait in Objective-C and Swift

Question

I want to change my UILabel\'s text after 2 seconds.

I tried setting my UILabel\'s text to \"A text\", and use sleep(2) a

Answer 1

You can accomplish this with a timer, e.g.

   NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:4.0 target:self selector:@selector(eventToFire:) userInfo:nil repeats:YES]; // Fire every 4 seconds.

   ...

   - (void)eventToFire:(NSTimer*)timer {
      // Do Something
   }