Object.bool

描述

该对象是否存在？

The three examples below give the same result.

using UnityEngine;

public class Example : MonoBehaviour
{
    // check if there is a rigidbody attached to this transform
    void Start()
    {
        if (GetComponent<Rigidbody>() == true)
        {
            Debug.Log("Rigidbody attached to this transform");
        }
    }
}

...等同于...

using UnityEngine;

public class Example : MonoBehaviour
{
    // check if there is a rigidbody attached to this transform
    void Start()
    {
        if (GetComponent<Rigidbody>())
        {
            Debug.Log("Rigidbody attached to this transform");
        }
    }
}

...which is also the same as this...

using UnityEngine;

public class Example : MonoBehaviour
{
    // check if there is a rigidbody attached to this transform
    void Start()
    {
        if (GetComponent<Rigidbody>() != null)
        {
            Debug.Log("Rigidbody attached to this transform");
        }
    }
}