GameObject.GetComponent 获取组件

# [GameObject](GameObject.html).GetComponent 获取组件

function *GetComponent* (*type* : Type) : [Component](../Component/Component.html)

*Description* 描述

Returns the component of Type type if the game object has one attached, null
if it doesn't. You can access both builtin components or scripts with this
function.
如果这个游戏物体包含一个类型为 type 的组件，则返回它。如果没有则为空。通过这个函数，你可以访问内建的组件或者脚本的组件。

GetComponent is the primary way of accessing other components. From
javascript the type of a script is always the name of the script as seen in the
project
view.
GetComponent 是访问别的组件的原始方法，对 javascript 来说，脚本的类型就是项目视图里面看到的脚本名称。

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Start() {
		Transform curTransform;
		curTransform = gameObject.GetComponent<Transform>();
		curTransform = gameObject.transform;
	}
	void Update() {
		ScriptName other = gameObject.GetComponent<ScriptName>();
		other.DoSomething();
		other.someVariable = 5;
	}
}
```

```
function Start () {
	var curTransform : Transform;

curTransform = gameObject.GetComponent(Transform);
	// 这里等同于:
	curTransform = gameObject.transform;
}

function Update () {
	// 为了访问附属于这个游戏物体的别的脚本里共有的变量很函数
	// (脚本名称是javascript文件的名称)
	var other : ScriptName = gameObject.GetComponent(ScriptName);
	// 调用这个脚本上的一个DoSomething函数
	other.DoSomething ();
	// 设置别的脚本实例上的另外一个变量
	other.someVariable = 5;
}
```

• function *GetComponent* (*type* : string) : Component

*Description* 描述

Returns the component with name type if the game object has one attached,
null if it doesn't.

如果游戏物体有一个附加组件，则返回名为 type 的组件，如果没有则为空。

It is better to use GetComponent with a Type instead of a string for
performance reasons. Sometimes you might not be able to get to the type however,
for example when trying to access a C# script from Javascript. In that case you
can simply access the component by name instead of type. Example:

由于性能原因，最好使用 Type 的 GetComponent，而不是用字符串。不过有时你可能无法得到 Type，例如当你从 Javascript 访问 C#脚本时，这个时候你可以简单通过名字而不是 type 来访问组件。例如：

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void Update() {
		ScriptName other;
		other = gameObject.GetComponent("ScriptName") as ScriptName;
		other.DoSomething();
		other.someVariable = 5;
	}
}
```

```
function Update () {
	// To access public variables and functions
	// in another script attached to the same game object.
	// (ScriptName is the name of the javascript file)
	//在另一个脚本附加相同的游戏物体，访问公共变量和函数
	//（ScriptName是javascript的文件名）
	var other : ScriptName;
	other = gameObject.GetComponent("ScriptName");
	// Call the function DoSomething on the script
	//调用函数做一些事情
	other.DoSomething ();
	// set another variable in the other script instance
	//设置在other脚本实例的另一个变量
	other.someVariable = 5;
}
```