Unity2019.3API教程（四）Component类

Component类

1. 官方定义
class in UnityEngine/Inherits from:Object/Implemented in:UnityEngine.CoreModule
属于UnityEngine命名空间下，继承自Object类，与之前的Object类和GameObject类一样属于核心模块。

2. 官方描述
Base class for everything attached to GameObjects.
Note that your code will never directly create a Component. Instead, you write script code, and attach the script to a GameObject. See Also: ScriptableObject as a way to create scripts that do not attach to any GameObject.
此类要对比下GameObject类，GameObject类是场景中所有实体的基类，而Component类是挂载在实体身上所有组件的基类，官方强调脚本是一个组件，但是脚本不可以直接挂载到实体上，当然官方介绍的ScriptableObject类是一种不附加到实体上的方法，后续再做介绍。

3. 属性
gameObject：The game object this component is attached to. A component is always attached to a gameobject.
语法：public GameObject gameObject;
获取自身物体，Component类比较特殊，除了gameobjec