Control the speed in my game?

Question

How can I control the speed of my player? I use the method didSimulatePhysics()to move:

   if(([self childNodeWithName:@"hero"].position.x >= 180)
   &&
   (self.touchedHero == YES)
    && _canMove ==YES){

    [[self childNodeWithName:@"hero"]setPosition:CGPointMake(180, [self childNodeWithName:@"hero"].position.y)];

    [self.world setPosition:CGPointMake(self.world.position.x-5, self.world.position.y)];

But this method depends on the performance of the device, and when I launch my application on the iOs device, the speed is very unstable, sometimes it goes very fast and sometimes it slows down, how can I control this speed ???

Answer 1

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