You are trying to create a MonoBehaviour using the 'new' keyword. This is not allowed. MonoBeha...

先说严重性

image.png

造成LogStringToConsole高调用（不排除有一部分是代码打印的）

You are trying to create a MonoBehaviour using the 'new' keyword.  
This is not allowed.  MonoBehaviours can only be added using AddComponent(). 

该错误出自unity的Editor.log日志中

macOS   ~/Library/Logs/Unity/Editor.log
Windows C:\Users\username\AppData\Local\Unity\Editor\Editor.log

word is poor show me the code,问题原因就是在B类中通过New 的方式使用A component
虽然console不会报错，但会给性能带来比较大的影响，component毕竟是毕竟耗性能的

public class A : MonoBehaviour {
  ... 
}

private A a = new A();
public class B: MonoBehaviour {
  ... 
}