NullReferenceException: Object reference not set to an instance of an objectBullet.Update () (at Ass...
NullReferenceException: Object reference not set to an instance of an object
Bullet.Update () (at Assets/Scripts/Bullet.cs:20)
老师,这个第22课时,我的子弹能追踪敌人但是报错,而且子弹还会不消失的落在地上,不知道为啥,代码也没错啊