1.创建有个有物理特性的场景

auto s = Sence::createWithPhysics();

s->getPhysicsWorld()->setGravity(Vec2(0,-50));

auto l = Layer::create();

s->addChild(l);

2.设置物理世界的边界

auto edge = Node::create();

setContentSize(Size());

setPhysicsBody(PyhsicsBody::createEdgeBox(Size()));

edge->setPosition(Point());

3.添加英雄并设置英雄的刚体属性

auto sp = Sprite::create();

sp->setContentSize(Size());

SetPyhsicsBody(PhysicsBody::createBox(Size()));