【Unity100个实用小技巧】世界Canvas自动隐藏，包含子物体

using UnityEngine;
 
public class AutoHide : MonoBehaviour
{
    public float alphaSpeed = 1f;          //渐隐渐显的速度
    private float m_UIAlpha = 1;             //初始化时让UI显示
    private CanvasGroup m_CanvasGroup;
    // Use this for initialization
    void Start()
    {
        m_CanvasGroup = this.GetComponent();
    }
 
    // Update is called once per frame
    void Update()
    {
        if (m_CanvasGroup == null) return;
 
        if (m_UIAlpha != m_CanvasGroup.alpha)
        {
            m_CanvasGroup.alpha = Mathf.Lerp(m_CanvasGroup.alpha, m_UIAlpha, alphaSpeed * Time.deltaTime);
 
            GetComponent().SetAllSceneModelAlpha(m_CanvasGroup.alpha);
 
            if (Mathf.Abs(m_UIAlpha - m_CanvasGroup.alpha) <= 0.01f)
            {
                m_CanvasGroup.alpha = m_UIAlpha;
            }
        }
    }
 
    /// 
    /// 显示
    /// 
    public void UIFadeInEvent()
    {
        m_UIAlpha = 1;
        if (m_CanvasGroup != null)
        {
            m_CanvasGroup.blocksRaycasts = true;      //可以和该对象交互
        }
    }
 
    /// 
    /// 隐藏
    /// 
    public void UIFadeOutEvent()
    {
        m_UIAlpha = 0;
        if (m_CanvasGroup != null)
        {
            m_CanvasGroup.blocksRaycasts = false;     //不可以和该对象交互
        }
    }
}