应用你的冲动后：

[node.physicsBody applyAngularImpulse:theImpulse];

只需将角速度钳制到最大速度，其最大速度取决于您想要允许车轮的速度旋转：

Simply clamp the angular velocity to a maximum speed whose value depends on how fast you want to allow the wheel to spin:

const CGFloat maxAngularVelocity = 2.5;
node.physicsBody.angularVelocity = MIN(node.physicsBody.angularVelocity, maxAngularVelocity);