Question

I have a child layer that I’m adding to the scene which contains a menu, it is initialized like so:

- (id) init
{
if((self=[super init]))
{
    CGSize winSize = [[CCDirector sharedDirector] winSize];

    CCMenuItemImage* attackButton = [CCMenuItemImage
                                    itemFromNormalImage:@"btnAttack.png" 
                                    selectedImage:@"btnAttack.png"
                                    target: self
                                    selector:@selector(attack)];

    CCMenu* menu = [CCMenu menuWithItems:attackButton,  nil];
    menu.position = ccp(winSize.width-80,winSize.height-140);
    [menu alignItemsHorizontally];
    [self addChild:menu];   

}
return self;
}

This crashes with a SIGABRT error unless I change the target: to ‘nil’. Why is this not working and how can I fix it?

Answer 1

This should crash if you don’t have attack: defined in your class.
Do you really need a parameter to attack?

Easy steps to check if that’s your problem:

1) remove the param, change the code to:

target: self
selector:@selector(attack)];

2) add the attack method, and check the console output:

-(void)attack
{
   NSLog(@"test");
}

To better understand where is the problem, show the breakpoints in your navigator bar, click the plus button and add exception breakpoint … so when the app crashes (if still does) you can see the call stack and see what’s wrong