使脚本的所有实例都在编辑模式下执行。
默认情况下，仅在播放模式下执行 MonoBehaviour。
通过添加此属性，MonoBehaviour 任何实例的回调函数都将在 Editor 未处于播放模式时执行。
这些函数不像它们在播放模式下那样被不断调用。
- Update is only called when something in the scene changed.
- OnGUI is called when the Game View recieves an Event.
- OnRenderObject and the other rendering callback functions are called on every repaint of the Scene View or Game View.
另请参阅：runInEditMode。
// The PrintAwake script is placed on a GameObject. The Awake function is
// called when the GameObject is started at runtime. The script is also
// called by the Editor. An example is when the scene is changed to a
// different scene in the Project window.
// The Update() function is called, for example, when the GameObject transform
// position is changed in the Editor.
using UnityEngine;
[ExecuteInEditMode]
public class PrintAwake : MonoBehaviour
{
void Awake()
{
Debug.Log("Editor causes this Awake");
}
void Update()
{
Debug.Log("Editor causes this Update");
}
}