如何在应用了这样的冲动后停止精灵：
player.physicsBody!.applyImpulse(CGVectorMake(50,0))
是否有可能使运动在一段时间内减少？ (2秒)
解决方法
为了阻止physicsBody的移动,你可以使用’velocity’变量,如下所示：
//this will reset the x,y based velocity to a halt/stop player.physicsBody?.velocity = CGVectorMake(0,0) //if you would also like to stop any rotation that may be present player.physicsBody?.angularVelocity = 0
要解决第二个问题,你应该研究’linearDamping’来影响速度,’angularDamping’来影响angularVelocity(旋转).这些physicsBody参数允许您在施加脉冲后随时间减慢速度(类似于摩擦).
//These values should be set when creating the physicsBody. //should experiment with these values to get the desired effect. player.physicsBody?.linearDamping = 1.10 player.physicsBody?.angularDamping = 0.25
