GameObject.SetActive

参数

描述

根据给定的值 true 或 /false/，激活/停用 GameObject。

GameObject 可能因为父项未处于活动状态而处于非活动状态。在这种情况下，调用 SetActive 不会激活它，而是仅设置此 GameObject 的本地状态，该状态可使用 GameObject.activeSelf 加以检查。当所有父项均处于活动状态时，Unity 便可以使用此状态。

停用 GameObject 将禁用每个组件，包括附加的渲染器、碰撞体、刚体和脚本。例如，Unity 将不再调用附加到已停用 GameObject 的脚本的 Update() 方法。当 GameObject 收到 SetActive(true) 或 SetActive(false) 时，将调用 OnEnable 或 /OnDisable/。

using UnityEngine;

// GameObject.SetActive demo.
//
// Show a column of cubes. Any cube can be clicked by the mouse
// and have SetActive set to false. The cubes beneath the hidden
// cube will not have SetActive set to false, but will not be
// shown.  This is the feature of SetActive. Also, the cubes have
// SetActive set back to true 2 seconds after they are hidden.

public class Example : MonoBehaviour
{
    private GameObject[] gameObjects;
    private int numberOfGameObjects = 5;
    private float delay = 2.0f;

    void Awake()
    {
        // Create some GameObjects.
        gameObjects = new GameObject[numberOfGameObjects];

        for (int i = 0; i < numberOfGameObjects; i++)
        {
            // Create, place in the world, and set name.
            gameObjects[i] = GameObject.CreatePrimitive(PrimitiveType.Cube);
            gameObjects[i].transform.position = new Vector3(0.0f, -1.5f * i, 0.0f);
            gameObjects[i].name = i.ToString();

            // The first GameObject is the top parent, so ignore it for now.
            if (i > 0)
            {
                gameObjects[i].transform.parent = gameObjects[i - 1].transform;
            }
        }
    }

    private float startTime = 0.0f;
    private bool increaseTime = false;

    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            RaycastHit hitInfo = new RaycastHit();
            bool hit = Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hitInfo);

            // Set GameObject SetActive to false when
            // hit by a mouse click.
            if (hit)
            {
                hitInfo.transform.gameObject.SetActive(false);

                startTime = 0.0f;
                increaseTime = true;
            }
        }

        // Show the GameObjects when time exceeds delay.
        if (increaseTime)
        {
            startTime += Time.deltaTime;
            if (startTime > delay)
            {
                for (int i = 0; i < numberOfGameObjects; i++)
                {
                    // Note that some of the GameObjects
                    // might have true already.
                    gameObjects[i].SetActive(true);
                }

                increaseTime = false;
            }
        }
    }

    // Show time.
    void OnGUI()
    {
        GUIStyle fontSize = new GUIStyle(GUI.skin.GetStyle("label"));
        fontSize.fontSize = 24;
        GUI.Label(new Rect(10, 10, 250, 50), "Time: " + startTime.ToString("F2"), fontSize);
    }
}