if anyone else wants to know i used the following code in my level dealloc method

for (b2Body* b = world->GetBodyList(); b; b = b->GetNext())
{

if ([b->GetUserData() isKindOfClass:[Platform class]]) {
//Synchronize the AtlasSprites position and rotation with the corresponding body
world -> DestroyBody(b);
}
}

So now i just load a subclass of CClayer to load my platform objects with reference to the main world then to load a new one i simply remove the child then re ad with reference to a new tiled map. This tute has made it easy stuff

Try checking the class type. Example: [myObject isKindOfClass:[Platform class]]

I’m confused. You said that “…but all the others except the one it removed are still there”. They are there because you didn’t remove it (which you said above). You need to remove them all if you want to clear out the whole thing.

for (b2Body* b = world->GetBodyList(); b; b = b->GetNext())
{
if (b->GetUserData() == platform) {
//Synchronize the AtlasSprites position and rotation with the corresponding body
world -> DestroyBody(b);
}
}

Which successfully removes a single platform and then i load my next platforms but all the others except the one it removed are still there as Box2d Bodys.

Im sure it is something i am not getting with how to call box2d bodys but im not sure.

Thanks for your help.