Unity 2D物体移动

方法1：使用transform.Translate()函数

using UnityEngine;

public class MoveDemo : MonoBehaviour
{
    private void Update()
    {
        GetInput();
    }

    //获取键盘输入的操作
    public void GetInput()
    {
        if (Input.GetKey(KeyCode.W))
        {
            this.gameObject.transform.Translate(Vector3.forward * Time.deltaTime);
        }
        if (Input.GetKey(KeyCode.S))
        {
            this.gameObject.transform.Translate(Vector3.down * Time.deltaTime);
        }
        if (Input.GetKey(KeyCode.A))
        {
            this.gameObject.transform.Translate(Vector3.left * Time.deltaTime);
        }
        if (Input.GetKey(KeyCode.D))
        {
            this.gameObject.transform.Translate(Vector3.right * Time.deltaTime);
        }
    }
}

方法2：使用Rigidbody2D组件

using UnityEngine;

public class MoveDemo : MonoBehaviour
{
    public float moveSpeed = 3.0f;

    Rigidbody2D rb2d;
    Vector2 inputPos;

    private void Start()
    {
        rb2d = gameObject.GetComponent();
        inputPos = new Vector2();
    }

    private void Update() { }

    //获取物理操作
    private void FixedUpdate()
    {
        MoveObject();
    }

    public void MoveObject()
    {
        //获取键盘操作的水平数值
        inputPos.x = Input.GetAxisRaw("Horizontal");
        //获取键盘操作的垂直数值
        inputPos.y = Input.GetAxisRaw("Vertical");
        //向量归一，使其移动速度一致。
        inputPos.Normalize();
        //移动速率
        rb2d.velocity = inputPos * moveSpeed;
    }
}

方法1：transform.localPosition

using UnityEngine;

public class MoveDemo : MonoBehaviour
{
    private void FixedUpdate()
    {
        MoveRigth();
    }

    //移动
    public void MoveRigth()
    {
        Vector2 pos = gameObject.transform.localPosition;
        //向右 * 每帧数时间
        pos += Vector2.right * Time.deltaTime;
        //移动
        gameObject.transform.localPosition = pos;
    }
}

方法2：使用Rigidbody2D组件

using UnityEngine;

public class MoveDemo : MonoBehaviour
{
    //速度
    public float moveSpeed = 3.0f;

    Rigidbody2D rb2d;

    private void Start()
    {
        //获取Rigidbody2D组件
        rb2d = gameObject.GetComponent();
    }

    private void Update() { }

    //获取物理操作
    private void FixedUpdate()
    {
        MoveRigth();//
    }

    //向右移动
    public void MoveRigth()
    {
        //速率
        rb2d.velocity = Vector2.right * moveSpeed;
    }
}