Question

I have a function that returns a variable and I want to know how to return an array the issue is it isn’t an NSArray it is just an average C array like this…

-(b2Fixture*) addFixturesToBody:(b2Body*)body forShapeName:(NSString*)shape
{
    BodyDef *so = [shapeObjects objectForKey:shape];
    assert(so);
       FixtureDef *fix = so->fixtures;
    int count = -1;
    b2Fixture *Fixi[4];
    while(fix)
    {

        count++;
        NSLog(@"count = %d",count);
        Fixi[count]= body->CreateFixture(&fix->fixture);
        if (Fixi[count]!=0) {
            NSLog(@"Fixi %d is not 0",count);
        }
        if (body->CreateFixture(&fix->fixture)!=0) {
            NSLog(@"body %d is not 0",count);
        }

        fix = fix->next;

    }

    return *Fixi;

}

If you see some variable types you don’t know it’s because I’m using cocos2d framework to make a game but I’m returning a variable of b2Fixture… This code compiles however only saves the value of the first block of the array “fixi[0]” not the whole array like I want to pass

anyhelp 🙂 thankyou

Answer 1

You can’t return a local array. You’ll need to do some kind of dynamic allocation or pull a trick like having the array inside a structure.

Here is a link to an in-depth article that should help you out.