MonoBehaviour.OnMouseOver()

Description

当鼠标悬停在 GUIElement 或 Collider 上时，每帧调用一次。

OnMouseEnter 在鼠标处于该对象上方的第一帧调用。 然后，每帧都调用 OnMouseOver，直到移开鼠标 - 此时，调用 OnMouseExit。

在属于 Ignore Raycast 层的对象上，不调用该函数。

当且仅当 Physics.queriesHitTriggers 为 true 时，才在标记为触发器的碰撞体上调用该函数。

OnMouseOver 可以作为协同程序使用 - 在函数中使用 yield 语句即可。 该事件将发送到附加到 Collider 或 GUIElement 的所有脚本。

//Attach this script to a GameObject to have it output messages when your mouse hovers over it.
using UnityEngine;

public class OnMouseOverExample : MonoBehaviour
{
    void OnMouseOver()
    {
        //If your mouse hovers over the GameObject with the script attached, output this message
        Debug.Log("Mouse is over GameObject.");
    }

    void OnMouseExit()
    {
        //The mouse is no longer hovering over the GameObject so output this message each frame
        Debug.Log("Mouse is no longer on GameObject.");
    }
}

另一个示例：

// This second example changes the GameObject's color to red when the mouse hovers over it
// Ensure the GameObject has a MeshRenderer

using UnityEngine;

public class OnMouseOverColor : MonoBehaviour
{
    //When the mouse hovers over the GameObject, it turns to this color (red)
    Color m_MouseOverColor = Color.red;

    //This stores the GameObject’s original color
    Color m_OriginalColor;

    //Get the GameObject’s mesh renderer to access the GameObject’s material and color
    MeshRenderer m_Renderer;

    void Start()
    {
        //Fetch the mesh renderer component from the GameObject
        m_Renderer = GetComponent<MeshRenderer>();
        //Fetch the original color of the GameObject
        m_OriginalColor = m_Renderer.material.color;
    }

    void OnMouseOver()
    {
        // Change the color of the GameObject to red when the mouse is over GameObject
        m_Renderer.material.color = m_MouseOverColor;
    }

    void OnMouseExit()
    {
        // Reset the color of the GameObject back to normal
        m_Renderer.material.color = m_OriginalColor;
    }
}