Version: 2021.3

GameObject.FindGameObjectsWithTag

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public static GameObject[] FindGameObjectsWithTag (string tag);

参数

tag 在搜索 GameObjects 时所针对的标签的名称。

描述

返回标签为 tag 的活动 GameObjects 的数组。如果未找到任何 GameObject,则返回空数组。

标签在使用前必须在标签管理器中加以声明。如果此标签不存在,或者传递了空字符串或 null 作为标签,则将抛出 UnityException

// Instantiates respawnPrefab at the location
// of all game objects tagged "Respawn".

using UnityEngine; using System.Collections;

public class ExampleClass : MonoBehaviour { public GameObject respawnPrefab; public GameObject[] respawns; void Start() { if (respawns == null) respawns = GameObject.FindGameObjectsWithTag("Respawn");

foreach (GameObject respawn in respawns) { Instantiate(respawnPrefab, respawn.transform.position, respawn.transform.rotation); } } }

另一个示例:

// Find the name of the closest enemy

using UnityEngine; using System.Collections;

public class ExampleClass : MonoBehaviour { public GameObject FindClosestEnemy() { GameObject[] gos; gos = GameObject.FindGameObjectsWithTag("Enemy"); GameObject closest = null; float distance = Mathf.Infinity; Vector3 position = transform.position; foreach (GameObject go in gos) { Vector3 diff = go.transform.position - position; float curDistance = diff.sqrMagnitude; if (curDistance < distance) { closest = go; distance = curDistance; } } return closest; } }

另一个示例,测试空数组:

using UnityEngine;

// Search for game objects with a tag that is not used

public class Example : MonoBehaviour { void Start() { GameObject[] gameObjects; gameObjects = GameObject.FindGameObjectsWithTag("Enemy");

if (gameObjects.Length == 0) { Debug.Log("No game objects are tagged with 'Enemy'"); } } }
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