Cocos2d iphone CCPhysisByTypeStatic不工作

我没有使用花栗鼠，但只有PhysicsEngine，Cocos2dv3

_physicsNode = [CCPhysicsNode node];
_physicsNode.collisionDelegate = self;
_physicsNode.gravity=ccp(0,-165);
_physicsNode.debugDraw = TRUE;
[self addChild:_physicsNode];

CCNode *handAttachPoint=[CCNode node];
handAttachPoint.physicsBody.type=CCPhysicsBodyTypeStatic;
handAttachPoint.position=ccp(self.contentSize.width/8,self.contentSize.height/2);
handAttachPoint.physicsBody = [CCPhysicsBody bodyWithCircleOfRadius:1.0 andCenter:handAttachPoint.anchorPointInPoints];
//handAttachPoint.physicsBody.collisionMask=@[];
[_physicsNode addChild:handAttachPoint];

我希望节点handAttachPoint在窗口中是静态的，但它仍在下降..：(

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感谢您的帮助！！

您在这里的订单错了：

handAttachPoint.physicsBody.type = CCPhysicsBodyTypeStatic;

...

handAttachPoint.physicsBody = [CCPhysicsBody bodyWithCircleOfRadius:1.0
                               andCenter:handAttachPoint.anchorPointInPoints];

在第一行中，尚未分配physicsBody，属性为nil。分配static在那里不起任何作用，它将被忽略。在初始化和分配physics body后，必须执行此分配