物体来回移动，两点之间

前期我会写一些基础的东西，后期会加深，我也在慢慢深造，嘿嘿，今天写物体来回移动

using UnityEngine;

using System.Collections;

using UnityEngine.UI;

public class BallMove : MonoBehaviour {

    public int A;

  void Start () {

       

       }

    // Update is called once per frame

    void Update() {

        A++;

        if (A<200)

       {

       //当达到最右边时的最远距离

            transform.position = new Vector3(transform.position.x + 3f * Time.deltaTime, transform.position.y, 0);

        }

        //当达到最右边时的最远距离并且回到原点时

        if (A>200&&A<400)

        {

           transform.position = new Vector3(transform.position.x - 3f * Time.deltaTime, transform.position.y, 0);

        }

        if (A>400)

        {

         //原点继续出去

            A = 0;

        }

  }

}