Unity3D如何获取GameObject上的Component

获取Component方式

1.直接将脚本挂载到 Light上，可以直接getComponent方式获取。

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class Test : MonoBehaviour {

     GameObject go;
     Light light;

     // Use this for initialization
     void Start () {
         go = new GameObject("name");

         //脚本挂载在Directional Light下，获取light方式
         light = GetComponent();

         light.color = Color.green;

     }

     // Update is called once per frame
     void Update () {

     }
 }

2.挂载在其他GameObject上,获取Light，可将脚本Light设置为public属性，脚本上拖动相应组件到上面

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class Test : MonoBehaviour {

     GameObject go;
     public Light light;

     // Use this for initialization
     void Start () {
         go = new GameObject("name");

         light.color = Color.green;

     }

     // Update is called once per frame
     void Update () {

     }
 }

3.先找到对应GameObject，再获取组件

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;

 public class Test : MonoBehaviour {

     GameObject go;
     GameObject goLight;

     Light light;

     // Use this for initialization
     void Start () {
         go = new GameObject("name");
         goLight = "color:#ff0000;">GameObject.Find("gameobject'name");//遍历Hierarchy下面全部的对象
         light = goLight.GetComponent();
         light.color = Color.green;

     }

     // Update is called once per frame
     void Update () {

     }
 }

注意：如果场景下包含相同的对象名字，则需要给GameObject.Find()方法可以传入绝对路径。栗子：Find（gm/gm1/Light）

 ///
 /// 寻找物体
 ///
 /// 作为父物体的transform
 /// 寻找的物体的名称
 /// 找到的物体
 void FindChild(Transform trans,string findname,ref Transform _trans)
 {

     if(trans.name.Equals(findname)){
         _trans = trans.transform;
         return;
     }

     if(trans.childCount != 0){
         for (int i = 0, len = trans.childCount; i < len; i++)
         {
             FindChild(trans.GetChild(i),findname,ref _trans);
         }
     }

 }