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; } }