Unity触摸 射线穿透UI解决

unity API 之EventSystem.current.IsPointerOverGameObject()

命名空间 ：UnityEngine.EventSystems

官方描述：

public bool IsPointerOverGameObject();

public bool IsPointerOverGameObject(int pointerId);        //触摸屏时需要的参数，即检测触碰的手值

Is the pointer with the given ID over an EventSystem object?

代码：

using UnityEngine;              
using System.Collections;
using UnityEngine.EventSystems;      //备上空间名public class MouseExample : MonoBehaviour
{void Update(){// Check if the left mouse button was clickedif (Input.GetMouseButtonDown(0)){// Check if the mouse was clicked over a UI elementif (EventSystem.current.IsPointerOverGameObject())    //检测是否点击了UI上的物件，返会bool值{Debug.Log("Clicked on the UI");}}}
}当使用触屏时，官方给出了另外一份代码

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;public class TouchExample : MonoBehaviour
{void Update(){// Check if there is a touchif (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)       //检测手值的触碰// Check if finger is over a UI elementif (EventSystem.current.IsPointerOverGameObject(Input.GetTouch(0).fingerId))   //监视是否触碰UI{Debug.Log("Touched the UI");}}}
}

总结：可以用此API避免在画面中点击到UI的物件又同时点到Game中的物件触发的一些情况;在触屏中可以判断点击的手指并执行相应的函数事件。