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Hi everyone,
i just stumbled upon a small problem.Maybe it is something obvious but after 10 hours straight programming my head is banging and i couldn't find the answer ... (did search but nothing came up in the forum)
is there a way in Cocos2d to schedule a method and pass it parameters ?
something like :
[self schedule:@selector(dance:) interval:1.0 parameters:@"polka!"];
Thank you,
John
try with CallFuncND... its' not the same but it might help you.
bradparks
Member
i haven't used it, but isn't NSInvocation something you can use to do this?
http://stackoverflow.com/questions/313400/nsinvocation-for-dummies
http://cocoawithlove.com/2008/03/construct-nsinvocation-for-any-message.html
Let us know if it works out!
Hmmm ... nope NSInvocation is awkward for this specific scenario.
But CCCallFuncND is fine.
I created an object (NSObject derivative) whose attributes are the method parameters.
I allocate 20 of them at the initialization of the scene and release them on the scene's dealloc. Each time i need to use one i get the next unused and pass it as the data parameter of CCCallfuncND. When the handler method is called the data gets passed along and at the end i mark that object as used. It is quick and dirty but a lot easier than NSInvocation (i would have to create a method for each parameter set !) and doesn't do any allocations/deallocations in the middle of the action.
When i get it tested i will try to post some code here.
Thank you both for your answers.
Also:
another big Thank You to Riq for Cocos2d. The quality and stability of the engine is incredible. I just made a donation and i wish i could donate more ... I don't know how many people donate, but as a full time programmer i know that this is a FINE piece of work. Every one using it should consider donating ...
Hi,
I have a similar question. I tried the CCCallFuncND solution, but I can't specify the interval using that...?
These are my codes:
In init func:
for(int i=0; i<[enemies count]; i++)
{ Enemy *enemy = [enemies objectAtIndex:i];
[enemy move];
[self addChild: enemy];
}
[self schedule:@selector(addBullets:) interval: 0.1];-(void)addBullets:(ccTime)dt
{ for(int i=0; i<[enemies count]; i++)
{ [self addBullet: [enemies objectAtIndex: i]];
}
}-(void)addBullet: (Enemy*) enemy
{ if([enemy.bullets.bulletType isEqualToString:@"aiming"])
{ [self addAimingBullet: enemy];
}
}-(void)addAimingBullet: (Enemy*) enemy
{ // do stuff
}I want to move "[self schedule:@selector(addBullets:) interval: 0.1];" into the for loop in the main func, passing along enemy, so I can just skip the loop through each enemies in the Add Bullets, 'coz I'd like to have different intervals for different types of enemies.
Any ideas?
Thanks.
@purplelilgirl: you can't specify a time interval with CCCallFuncND but you can run it in a CCSequence with a CCDelayTime.
[mySprite runAction [CCSequence actions:[CCDelayTime actionWithDuration:2],[CCCallFuncND ...],nil]];
that will run the selector after 2 seconds.
@pabloruiz55: oh no wonder... but what if I want it to run every second?
Can I repeat a runAction?
Or...
Can I do something like this?
id action = [CCCallFuncND actionWithTarget:self selector:@selector(addAimingBullet:) data:(Enemy*) enemy];
[self schedule:@selector(action:) interval: 0.1];Or equivalent to that? 'coz that crashes.
Thanks.
@pabloruiz55: oh no wonder... but what if I want it to run every second?
Can I repeat a runAction?
Or...
Can I do something like this?
id action = [CCCallFuncND actionWithTarget:self selector:@selector(addAimingBullet:) data:(Enemy*) enemy];
[self schedule:@selector(action:) interval: 0.1];
Or equivalent to that? 'coz that crashes.Thanks.
Came across this thread via searching on how to do something similar to you purplelilgirl - the way I have got this to work for me (scheduling repeating methods via runAction) is by doing the following:
id actionDelay = [CCDelayTime actionWithDuration:5];
id actionDone = [CCCallFuncN actionWithTarget:self selector:@selector(startgameLogic:)];
[self runAction:[CCSequence actions:actionDelay, actionDone, nil]];then I have my method "startgameLogic" that initiates 5 seconds after the start of this scene (because of the delay above). In this startgameLogic method (which only fires once), I then initiate my "real" "gameLogic" method by doing:
-(void)startgameLogic: (id)sender {
[self schedule:@selector(gameLogic:) interval:0.2 + ([sharedGameState difficulty]) - 0.3];
}Hope this helps. If anyone has any better ideas please post them :) This seems to work well for me. I am also quite sure you could use:
id action = [CCRepeatForever actionWithAction:in conjunction with CCCallFuncND though :)
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