x | 第一个对象。 |
y | 要与第一个对象进行比较的对象。 |
比较两个对象引用,判断它们是否引用同一个对象。
using UnityEngine;
public class Example : MonoBehaviour { public Collider target; void OnTriggerEnter(Collider trigger) { if (trigger == target) { print("We hit the target trigger"); } } }
如果没有目标,则及早退出。
using UnityEngine;
public class Example : MonoBehaviour { public Transform target; void Update() { // Early out if the target is gone if (target == null) { return; } } }
与 null
进行比较时要小心。
例如:
using UnityEngine;
public class Example : MonoBehaviour { void Start() { GameObject go = new GameObject(); Debug.Log(go == null); // false
Object obj = new Object(); Debug.Log(obj == null); // true } }
实例化 GameObject 会将其添加到场景中,因此它已完全初始化 (!destroyed)。实例化一个简单的 UnityEngine.Object 则没有这样的语义,因此它将保持“destroyed”状态,这将导致语句变成 true
与 null
进行比较。
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