iphone - how to apply animation for CCSprite -

am started 1 cocos2d game.in checking collision , if collision occurs creating animation using following code.animation code called not showing animation.what error this.please me solve.

-(void)check_collision:(cctime)dt {   for(polygonsprite *sprite in _cache)   {     if(cgrectintersectsrect(sprite.boundingbox,monkey.boundingbox))     {       if(sprite != monkey)       {       nslog(@"collision collision collision.......%@",sprite);       id s2 = [ccscaleto actionwithduration:0.5 scalex:1.5 scaley:1.5];       id fun = [cccallfuncn actionwithtarget:self selector:@selector(spritedone:)];       [sprite runaction:[ccsequence actions:s2,fun,nil]];       [self unschedule:@selector(check_collision:)];     }   } } 

}

try this,

[self schedule:@selector(check_collision:)interval:1];  -(void) check_collision: (cctime) t {    for(polygonsprite *sprite in _cache)    {        if(cgrectintersectsrect(sprite.boundingbox,monkey.boundingbox))        {            if(sprite != monkey)            {                id s2 = [ccscaleto actionwithduration:0.1 scalex:2 scaley:2];                id fun = [cccallfuncn actionwithtarget:self  selector:@selector(spritedone)];                [car.sprite runaction:[ccsequence actions:s2,fun,nil]];                [self unschedule:@selector(check_collision:)];            }        }     } }  -(void) spritedone {     // function logic goes here.. } 

hope helps.. thank you