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。
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