Collider.isTrigger

# [Collider](https://docs.unity3d.com/cn/2019.4/ScriptReference/Collider.html).isTrigger

public bool **isTrigger** ;

## 描述

碰撞体是不是触发器？

触发器不向传入 [Rigidbody](https://docs.unity3d.com/cn/2019.4/ScriptReference/Rigidbody.html) 注册碰撞，而是在刚体进入或退出触发器体积时发送 [OnTriggerEnter](https://docs.unity3d.com/cn/2019.4/ScriptReference/Collider.OnTriggerEnter.html)、[OnTriggerExit](https://docs.unity3d.com/cn/2019.4/ScriptReference/Collider.OnTriggerExit.html) 和 [OnTriggerStay](https://docs.unity3d.com/cn/2019.4/ScriptReference/Collider.OnTriggerStay.html) 消息 。

```
using UnityEngine;

public class Example : MonoBehaviour
{
    Collider m_ObjectCollider;

void Start()
    {
        //Fetch the GameObject's Collider (make sure they have a Collider component)
        m_ObjectCollider = GetComponent<Collider>();
        //Here the GameObject's Collider is not a trigger
        m_ObjectCollider.isTrigger = false;
        //Output whether the Collider is a trigger type Collider or not
        Debug.Log("Trigger On : " + m_ObjectCollider.isTrigger);
    }

void OnMouseDown()
    {
        //GameObject's Collider is now a trigger Collider when the GameObject is clicked. It now acts as a trigger
        m_ObjectCollider.isTrigger = true;
        //Output to console the GameObject’s trigger state
        Debug.Log("Trigger On : " + m_ObjectCollider.isTrigger);
    }
}
```