cocos2d for iPhone

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

1. 

   dnsolo
   Member

   Hi all,

   I've set up an IntervalAction and want to pass an AtlasSprite
   reference to another method, but when the action runs I receive
   the following runtime error...

   'unrecognized selector sent to instance'

   I think there's probably something wrong with my syntax,
   can anyone advise, thanks? My code is below:

   -(void) impact: (AtlasSprite*) target {
   IntervalAction *impactSequence = [Sequence actions:
   [DelayTime actionWithDuration:5],
   [CallFunc actionWithTarget:self selector:@selector(moveTarget:target:)],
   nil];
   }

   -(void) moveTarget: (AtlasSprite*) target {
   // Do stuff with the received AtlasSprite 'target' reference
   }

   Posted 2 years ago #
2. 

   woebtz
   Member

   Can you try-

   [CallFunc actionWithTarget:self selector:@selector(moveTarget:)]

   I think "moveTarget:target:" would refer to a method matching:

   - (void) moveTarget: (type) var1 target: (type) var2;

   Posted 2 years ago #
3. 

   dnsolo
   Member

   Hi woebtz,

   Thanks, but I'm not clear about what you're suggesting (I'm an objective c newbie!)

   Posted 2 years ago #
4. 

   Codemattic
   Moderator

   Use CallFunc to call a method with no extra parameters:

   [CallFunc actionWithTarget:self selector:@selector(myMethod)]
   
   - (void) myMethod {...}

   Use CallFuncN to call a method with one extra parameter which is the node that the action is controlling. Notice the extra colon after myMethod!:

   [CallFuncN actionWithTarget:self selector:@selector(myMethod:)]
   
   - (void) myMethod: (id)node {...}

   Use CallFuncND when you also want to pass some extra data:

   [CallFuncN actionWithTarget:self selector:@selector(myMethod:data:) data:pointerToSomeData]     
   
   - (void) myMethod: (id)node data: (void*)d {...}

   hth, Codemattic

   Posted 2 years ago #
5. 

   Osiris
   Member

   I'm Hopeless....

   This is the callback function I think I need.

   [CallFuncND actionWithTarget:self selector:@selector(myMethod:data:) data:pointerToSomeData]     
   
   - (void) myMethod: (id)node data: (void*)d {...}

   but can someone supply my a quick example with the "@selector(myMethod:data:) data:pointerToSomeData]" part? the pointers and objects are where I get confused.

   but I have a function called "-(void)removeMonsterSprite:(NSInteger) monsterIndex {"

   and I want to supply it the tag in the CallFuncND function.

   Thanks.

   Posted 2 years ago #
6. 

   Osiris
   Member

   I just tried a variation:

   id action3 = [CallFuncN actionWithTarget:self selector:@selector(removeMonsterSprite:)];

   with the rest of the actions (which work fine) and its callback is:

   -(void)removeMonsterSprite:(id) monsterId {
   
   	//Sprite *monster = (Sprite *)[self getChildByTag:20+monsterIndex];
   
   	[monsterId setVisible:NO];
   	[monsterId setScale:0.1];
   	[monsterId setPosition:CGPointMake(240, 160)];
   
   	iScore--;
   	monsterCount--;
   
   	[monsterId release];
   }

   (I know I should step away before I hurt someone...)

   The preceeding compiled, but it froze when one of my monsters hit that callback in the action.

   Posted 2 years ago #
7. 

   Codemattic
   Moderator

   why are you releasing monsterId?

   Posted 2 years ago #
8. 

   Osiris
   Member

   because I dont know any better?

   It didn't work anyway,... just locked up the phone. :)

   Im very green, but trying very hard.

   Posted 2 years ago #
9. 

   Codemattic
   Moderator

   Put as the first line of removeMonsterSprite:

   NSLog([monsterId description]);

   so we can see what type of object is being sent to the method.

   You could set a breakpoint there and step until you crash so you can see exactly what line is blowing up.

   I assume iScore and monsterCount are globals?

   "Im very green, but trying very hard."

   its the only way :) good luck!

   Posted 2 years ago #
10. 

    dnsolo
    Member

    Hi all,

    After much trial and error (and thanks to Codemattic :) I've finally got my 'CallFuncND' code working.

    To clarify to other developers, I wanted to pass a single 'AtlasSprite' reference to another method from within an action Sequence.

    Here's the code that works...

    // Creating the action sequence
    id myActions = [Sequence actions:
    [DelayTime actionWithDuration:1.5], // Replace with your own actions as required
    [CallFuncND actionWithTarget:self selector:@selector(myEffects:data:) data:(AtlasSprite*)mySprites[0]],
    nil];

    // Running the action sequence
    [mySprites[0] runAction: myActions];

    // The method we want to call directly from the action sequence (using 'CallFuncND' as above)
    - (void) myEffects: (id)node data: (AtlasSprite*)mySprite {
    // Do something with your 'mySprite' reference here...
    }

    Posted 2 years ago #
11. 

    artakus
    Member

    can I pass integer OR float using CallFuncN or callFuncND? How to do that? like this?

    //Calling
    
    intvalue = 100;
    
    [CallFuncND actionWithTarget:self selector:@selector(myEffects:data:) data:(NSInteger *) intvalue,nil];
    
    //function
    
    -(void)myEffects:(NSInteger *)intvalue
    
    {
    
        NSLog(@"intvalue: %d", invalue);
    
    }

    AM I RIGHT? HOW TO PASS integer or any datatype using CallFunc? Anyone?

    Posted 2 years ago #
12. 

    Clain
    Member

    There's no nil at the end of the CallFuncND above. And the myEffects method should have the following signature :
    - (void)myEffects:(id)sender data:(NSInteger *)intvalue
    Otherwise it's ok and should work fine.

    Posted 2 years ago #
13. 

    artakus
    Member

    Thanks. And.. If My method is on another Class Example method soldierGoodBreath. How to call it using CallFuncND

    Example I use Sprite to call it:

    [sprite runAction:[CallFuncND actionWithTarget:self selector@selector([setAnimate soldierGoodBreath]:data:) data:(CocosNode *) [self getChildByTag:tagSprite]]]

    I already try it but not success. Can we use @selector to call method in another class like above?

    Posted 2 years ago #
14. 

    artakus
    Member

    Ahh sorry I got it!. the actionWithTarget should be the object of the another class

    and the selector should be like this

    selector: @selector(soldierBreath:data)

    Thanks

    Posted 2 years ago #

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