unity实现按键控制人物移动

在unity开发中我们经常会用到按键实现某些功能，如wasd控制人物的移动，具体怎么实现呢？代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class KeysMove : MonoBehaviour
{
// Start is called before the first frame update
void Start()
{

}

// Update is called once per frame
void Update()
{
control();

}
public void control()
{
if (Input.GetKey(KeyCode.W))
{
this.transform.Translate(Vector3.forward);
//gameObject.transform.Translate(0, 0, move, Space.Self);

}
else if (Input.GetKey(KeyCode.S))//按键盘s向下移动
{
this.transform.Translate(Vector3.back);
}

if (Input.GetKey(KeyCode.A))//按键盘a向左移动
{
this.transform.Translate(Vector3.left);
}
else if (Input.GetKey(KeyCode.D))//按键盘d向右移动
{
this.transform.Translate(Vector3.right);
}
}

}