Unity
EventSystem.IsPointerOverGameObject
EventSystem.IsPointerOverGameObject:1)功能简述public bool IsPointerOverGameObject();public bool IsPointerOverGameObject(int pointerId);pointerId:Pointer (touch / mouse) ID.Is the pointer with the given ID over an EventSystem object?If you use IsPointerOverGameObject() without a parameter, it points to the 'left mouse button' (pointerId = -1); therefore when you use IsPointerOverGameObject for touch, you should consider passing a pointerId to it.2)使用举例 using UnityEngine; using System.Collections; using UnityEngine.EventSystems;public class MouseExample : MonoBehaviour{ void Update() { // Check if the left mouse button was clicked if (Input.GetMouseButtonDown(0)) { // Check if the mouse was clicked over a UI element if (EventSystem.current.IsPointerOverGameObject()) { Debug.Log('Clicked on the UI'); } } } }
打开Unity,新建一个工程,具体如下图
在场景中,新建一个“Cube”和“Button”,调整各自大小及布局,具体如下图
在工程中新建脚本“EventSystemsTest”,双击脚本或者右键“Open C# Project”打开脚本,具体如下图
在脚本“EventSystemsTest”上编写代码,在Update函数里,按下鼠标左键,发射一条射线,然后使用“EventSystem.current.IsPointerOverGameObject()”的返回值来判断是碰到UI还是场景物体,其中返回TRUE是碰到UI,具体代码和代码说明图下图
“EventSystemsTest”脚本的具体内容如下:using UnityEngine;using UnityEngine.EventSystems;public class EventSystemsTest : MonoBehaviour { // Update is called once per frame void Update () { if (Input.GetMouseButtonDown(0)) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHit hitInfo; if (Physics.Raycast(ray, out hitInfo)) { if (EventSystem.current.IsPointerOverGameObject() == true) { Debug.Log(' the UI'); } else { Debug.Log(' the Cube'); hitInfo.collider.GetComponent
脚本编译正确,回到Unity界面,在场景中,新建一个“GameObject”,把脚本“CursorTest”赋给“GameObject”,具体如下图
运行场景,在游戏视图中,按下鼠标左键,首先是点击UI的效果,然后是点击场景物体的效果,控制台Console打印,具体如下图
到此,《Unity UGUI技巧 之 区分鼠标点击UI还是场景物体》讲解结束,谢谢
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