unity 通过OnMouseEnter()，OnMouseExit()实现鼠标悬停时各种效果（UI+3D物体）一、3D物体二、UI

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我是靠谱客的博主仁爱乌龟，这篇文章主要介绍unity 通过OnMouseEnter()，OnMouseExit()实现鼠标悬停时各种效果（UI+3D物体）一、3D物体二、UI，现在分享给大家，希望可以做个参考。

OnMouseEnter() 鼠标进入

OnMouseExit() 鼠标离开

一、3D物体

OnMouseEnter()，OnMouseExit()都是通过collider触发的，且碰撞器不能是trigger，鼠标进入，或离开collider时，自动调用这两个函数。

另外，OnMouseOver()类似，与OnMouseEnter()区别是，OnMouseOver()会当鼠标在该物体上collider内时，每帧调用1次，OnMouseEnter()仅在鼠标进入时调用1次。

二、UI

UI部分通过eventTrigger组件实现类似功能

复制代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;//使用text，image组件
public class eventTriggrtTest : MonoBehaviour {

public Image image;
    float ColorAlpha = 0f;//图片透明程度
    public float speed = 0.75f;

bool flag = false;
    private void Start()
    {
        image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
    }
    void Update()
    {
    //    Debug.Log("OnMouseEnter");
        if(flag == true)
        {
            if (ColorAlpha <= 0.75)
            {
                ColorAlpha += Time.deltaTime * speed;
                image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
            }

}
           Debug.Log(ColorAlpha);
    }
    public void OnMouseEnter()
    {
        flag = true;
    }
    public void OnMouseExit()
    {
        //    Debug.Log("OnMouseExit");
        flag = false;
            ColorAlpha = 0;
            image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
       
    }

}

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;//使用text，image组件
public class eventTriggrtTest : MonoBehaviour {

    public Image image;
    float ColorAlpha = 0f;//图片透明程度
    public float speed = 0.75f;

    bool flag = false;
    private void Start()
    {
        image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
    }
    void Update()
    {
    //    Debug.Log("OnMouseEnter");
        if(flag == true)
        {
            if (ColorAlpha <= 0.75)
            {
                ColorAlpha += Time.deltaTime * speed;
                image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
            }

        }
           Debug.Log(ColorAlpha);
    }
    public void OnMouseEnter()
    {
        flag = true;
    }
    public void OnMouseExit()
    {
        //    Debug.Log("OnMouseExit");
        flag = false;
            ColorAlpha = 0;
            image.GetComponent<Image>().color = new Color(255, 255, 255, ColorAlpha);
       
    }

   
}