GameObject.GetComponentInChildren

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

public [Component](https://docs.unity3d.com/cn/2019.4/ScriptReference/Component.html) **GetComponentInChildren** (Type **type**);

public [Component](https://docs.unity3d.com/cn/2019.4/ScriptReference/Component.html) **GetComponentInChildren** (Type **type**, bool **includeInactive**);

## 参数

| type | 要检索的组件的类型。 |
| ------ | ---------------------- |

## 返回

**Component** 匹配类型的组件（如果找到）。

## 描述

使用深度首次搜索返回 GameObject 或其任何子项中类型为 `type` 的组件。

仅当在活动 GameObject 上发现组件时才返回该组件。

```
using UnityEngine;

public class GetComponentInChildrenExample : MonoBehaviour
{
    // Disable the spring on the first HingeJoint component found on any child object

void Start()
    {
        HingeJoint hinge = gameObject.GetComponentInChildren(typeof(HingeJoint)) as HingeJoint;

if (hinge != null)
            hinge.useSpring = false;
        else
        {
            // Try again, looking for inactive GameObjects
            HingeJoint hingeInactive = gameObject.GetComponentInChildren(typeof(HingeJoint), true) as HingeJoint;

if (hingeInactive != null)
                hingeInactive.useSpring = false;
        }
    }
}
```

---

public T **GetComponentInChildren** (bool **includeInactive**= false);

## 返回

**T** 匹配类型的组件（如果找到）。

## 描述

通用版本。有关更多详细信息，请参阅[通用函数](https://docs.unity3d.com/cn/2019.4/Manual/GenericFunctions.html)页面。

```
using UnityEngine;

public class GetComponentInChildrenExample : MonoBehaviour
{
    // Disable the spring on the first HingeJoint component found on any child object

void Start()
    {
        HingeJoint hinge = gameObject.GetComponentInChildren<HingeJoint>();

if (hinge != null)
            hinge.useSpring = false;
        else
        {
            // Try again, looking for inactive GameObjects
            HingeJoint hingeInactive = gameObject.GetComponentInChildren<HingeJoint>(true) as HingeJoint;

if (hingeInactive != null)
                hingeInactive.useSpring = false;
        }
    }
}
```