Question

Would you know how to change the value of flashPosX ? A “log” in changeFlashPosX works fine, but the value does not change:

-(void)changeFlashPosX{
    CCLOG(@"change");
    flashPosX = random() % 300;
    CCLOG(@"rando : %f", flashPosX);
}

-(void)animFlash{
    CCScaleTo *to1 = [CCScaleTo actionWithDuration:.2 scale:1];
    CCScaleTo *to0 = [CCScaleTo actionWithDuration:.6 scale:0];
    CCMoveTo *moveTo = [CCMoveTo actionWithDuration:0.1 position:ccp(flashPosX, flash.position.y)];
    CCCallFunc *callChange = [CCCallFunc actionWithTarget:self selector:@selector(changeFlashPosX)];
    CCSequence *seq = [CCSequence actions:to1, to0, callChange, moveTo, nil];
    //CCAction *repeatSeq = [CCRepeatForever actionWithAction:seq];
    CCRepeatForever *repeatSeq = [CCRepeatForever actionWithAction:seq];
    [flash runAction:repeatSeq];
}

The output :

rando : 164.000000
change
rando : 217.000000
change
rando : 241.000000
change
rando : 75.000000

Answer 1

Try this:

CCMoveTo *moveTo = [CCMoveTo actionWithDuration:0.1 position:ccp(random() % 300, flash.position.y)];

If it works, then the issue is either with the scope and/or retention of your flashPosX variable, or with the routine loop called by the CCSequence.

Also, try this:

CCRepeatForever *repeatSeq = [CCRepeatForever actionWithAction:seq];