Version: 2017.3 (switch to 2017.4)
LanguageEnglish
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.

Object.operator ==

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

public static operator ==(x: Object, y: Object): bool;
public static bool operator ==(Object x, Object y);

Parameters

x The first Object.
y The Object to compare against the first.

Description

Compares two object references to see if they refer to the same object.

    var target : Collider;
    function OnTriggerEnter (trigger : Collider) {
        if (trigger == target)
            print("We hit the target trigger");
    }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Collider target; void OnTriggerEnter(Collider trigger) { if (trigger == target) print("We hit the target trigger"); } }

Get early out if there is no target.

    var target : Transform;
    function Update () {
        // Early out if the target is gone
        if (target == null)
            return;
    }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Transform target; void Update() { if (target == null) return; } }

Be careful when comparing with null.

e.g.

GameObject go = new GameObject();
Debug.Log (go == null); // false

Object obj = new Object(); Debug.Log (obj == null); // true

Instatiating a GameObject adds it to the scene so it's completely initialized (!destroyed). Instantiating a simple UnityEngine.Object has no such semantics, so the it stays in the 'destroyed' state which compares true to null.

对文档有任何疑问,请移步至开发者社区提问,我们将尽快为您解答