GameObject.Find()
优点：使用简单方便
不会因为重名而报错，同时查找的是自上而下的第一个物体缺点不能查找被隐藏的物体，否则出现“空引用异常”，这是很多新人在查找出现空引用bug的原因。
全局查找(遍历查找)，查找效率低，很消耗性能。代码演示：using System.Collections;
using System.Collections.Generic;using UnityEngine;public class GameObjectFind : MonoBehaviour {
private GameObject thing;
void Start () {
thing = GameObject.Find("C4");
thing.name = "thing"; }}1
2345678910111213141516Transform.Find()，通过Transform组件查找子物体。用这个方法查找物体时，根节点一定要处于“显示”状态，不能被隐藏。用它查找孙物体及孙孙物体，一定要使用“绝对路径”，否则出现“空引用异常”。代码演示：using System.Collections;
using System.Collections.Generic;using UnityEngine;public class TransformFind : MonoBehaviour {
private Transform m_Transform;
private GameObject one; private GameObject two;void Start () {
m_Transform = gameObject.GetComponent<Transform>();
one = m_Transform.Find("D2").gameObject; two = m_Transform.Find("D2/D3").gameObject;Debug.Log(one.name);
Debug.Log(two.name);}
}1
2345678910111213141516171819202122GameObject.FindGameObjectWithTag()和GameObject.FindGameObjectsWithTag()，通过Tag标签查找物体。GameObject.FindGameObjectsWithTag()：通过Tag标签查找到一组物体，返回一个数组。GameObject.FindGameObjectWithTag()：查找到这类tag标签，自上而下第一个物体。代码演示：
using System.Collections;
using System.Collections.Generic;using UnityEngine;public class TagFind : MonoBehaviour {
private GameObject thing;
private GameObject[] things; void Start () {things = GameObject.FindGameObjectsWithTag("Player");
thing = GameObject.FindGameObjectWithTag("Player");Debug.Log(things.Length);
Debug.Log(thing.name); } }1
2345678910111213141516171819FindObjectsOfType()FindObjectsOfTypeAll()：返回指定类型的对象列表。代码演示：
using System.Collections;
using System.Collections.Generic;using UnityEngine;public class FindObjectOfType : MonoBehaviour {
private GameObject[] things;
private GameObject thing;void Start (http://www.my516.com) {
things = FindObjectsOfType<GameObject>();
thing = FindObjectOfType<GameObject>();Debug.Log("第一个" + thing.name);
for(int i = 0; i < things.Length; i++) { Debug.Log(things[i].name); } }}---------------------