cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   fisher024
   Member

   Hi, I am looking for example about scheduler, anyone could help me?

   Posted 2 years ago #
2. 

   artem
   Member

   I'm using it like this:

   //function
   -(void)tick:(ccTime)dt
   {
   //your code goes here
   // example ivar+=1; blah blah

   }

   Then call the scheduler like this:

   [self schedule: @selector(tick:) interval:2]; //specify interval in seconds

   Hope this helps

   Posted 2 years ago #
3. 

   PhilM
   Member

   have you looked at the demos in the main cocos2d download? Theres plenty that make use of schedules. Artem shows you the base bits above otherwise.

   Posted 2 years ago #
4. 

   fisher024
   Member

   thanks guys, that are helpful.

   but I have another question, how can I stop the scheduler under specific condition?
   for example,

   - (void)createEnemy:(ccTime)dt {
   //do some stuff
   }
   and then,

   [self schedule:@selector(createEnemy:) interval: 1] // create an enemy every second

   so, suppose I just need 5 enemies in all, what can I do to stop creating?

   Posted 2 years ago #
5. 

   fisher024
   Member

   I am waiting for your help

   Posted 2 years ago #
6. 

   fisher024
   Member

   I find a way. I add a counter in createEnemy and put this schedule into the main loop, so I can do a test in the main loop. code like this:

   static int counter=0;

   -(void)createEnemy;(ccTime)dt {
   //do some stuff
   counter++;
   }

   // main loop
   if(counter < 5) {
   [self schedule:@selector(createEnemy:) interval: 1];
   }
   else {[self unschedule:@selector(createEnemy:)];}

   it does work for me, is this OK?

   Posted 2 years ago #
7. 

   PhilM
   Member

   I think that means you re-scheduling the selector every run of your main loop. You only need it to run once.

   You could do it...
   if (counter == 0) {
   start schedule...
   }
   else if (counter == 5) {
   stop schedule...
   }

   Or, probably a better way, would be to trigger the schedule in your init or some other run once method, and check for the value of counter within your createEnemy method, and cancel it there if its 5 or whatever. This keeps your main loop less cluttered and processing less code each frame.

   Posted 2 years ago #
8. 

   fisher024
   Member

   if (counter == 0) {
   start schedule...
   }
   else if (counter == 5) {
   stop schedule...
   }
   I tried to put the test like this way, it did not work, so I add another schedule in init

   Posted 2 years ago #

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