GetBodyCount() always returning 0 in Box2d?

问题

I am using the cocos2d-iphone + Box2d engine, I have a simple call in Box2d to create a body:

b2Body *crateBody = world->CreateBody(&crateBodyDef);

Then I am printing the newly incremented body count variable through:

CCLOG(@"There are %0.0f bodies in the world.", world->GetBodyCount());

However, GetBodyCount() always returns 0? I know the body count variable is being incremented, as when I debug and step into CreateBody(..) m_BodyCount is incrementing, and my inspector returns 1 respectfully. I do not understand how with world->GetBodyCount() simply running a return m_BodyCount could this be failing and returning 0?

Hope somebody can help! Cheers.

I am using SVN rev. r31

Graham

回答1:

Is GetBodyCount() returning an int? If so, you should use %d in the format string.

来源：https://stackoverflow.com/questions/2116497/getbodycount-always-returning-0-in-box2d