Version: 2020.3

描述

当鼠标悬停在 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 可以是协程,在函数中只是使用 yield 语句。 此事件将发送至附加到 Collider 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; } }
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