Unity2D模拟控制位移

 using UnityEngine;
 using System.Collections;

 public class PlayerController : MonoBehaviour {

     public float speed = 10f;
     public Vector2 playerSize;

     void Update () {
         float v = Input.GetAxis("Vertical");
         float h = Input.GetAxis("Horizontal");

         transform.Translate(new Vector3(h * Time.deltaTime * speed, v * Time.deltaTime * speed, 0f));

         //检查坐标是否离开屏幕
         transform.position = transform.position.x <  + playerSize.x /  ? new Vector3( + playerSize.x / , transform.position.y, transform.position.z) : transform.position;
         transform.position = transform.position.x > Screen.width - playerSize.x /  ? new Vector3(Screen.width - playerSize.x / , transform.position.y, transform.position.z) : transform.position;
         transform.position = transform.position.y <  + playerSize.y /  ? new Vector3(transform.position.x,  + playerSize.y / , transform.position.z) : transform.position;
         transform.position = transform.position.y > Screen.height - playerSize.y /  ? new Vector3(transform.position.x, Screen.height - playerSize.y / , transform.position.z) : transform.position;

     }

     void OnGUI()
     {
         GUI.Label(new Rect(10f, 10f,200f, 100f), transform.position.ToString());
     }
 }

控制UI的移动，可以使用在2D类移动上