简单的虚拟摇杆控制移动（NGUI）

一、用NGUI创建虚拟摇杆贴图

先创建一个sprite作为背景叫做JoyStick 并添加一个BoxCollider，再创建一个sprite child作为虚拟摇杆中间的按钮，叫做button

二、通过虚拟摇杆获得x，y偏移值

 using UnityEngine;
 using System.Collections;

 public class JoyStick : MonoBehaviour
 {

     private bool isPress = false;
     private Transform button;

     //从虚拟摇杆的得到的x，y偏移值-1到1之间
     public static float h = ;
     public static float v = ;
     void Awake()
     {
         button = transform.FindChild("button");
     }
     void OnPress(bool isPress)
     {
         this.isPress = isPress;
         if (!isPress)
         {
             button.localPosition = Vector2.zero;
             h = ;
             v = ;
         }
     }

     void Update()
     {
         if (isPress)
         {
             Vector2 touchPos = UICamera.lastEventPosition - new Vector2(, );
             float distance = Vector2.Distance(Vector2.zero, touchPos);
             if (distance > )//虚拟摇杆按钮不能超过半径
             {
                 touchPos = touchPos.normalized * ;
             }
             button.localPosition = touchPos;

             h = touchPos.x / ;
             v = touchPos.y / ;
         }
     }
 }

三、通过偏移控制移动 主角添加了character controller

 using UnityEngine;
 using System.Collections;

 public class PlayerMove : MonoBehaviour
 {
     private CharacterController cc;
     public float speed = 3f;

     void Awake()
     {
         cc = GetComponent<CharacterController>();
     }

     // Update is called once per frame
     void Update ()
     {
         //键盘控制
         float h = Input.GetAxis("Horizontal");
         float v = Input.GetAxis("Vertical");

         //虚拟摇杆控制
         if (JoyStick.h !=  || JoyStick.v != )
         {
             h = JoyStick.h;
             v = JoyStick.v;
         }

         if (Mathf.Abs(h) > 0.1f || Mathf.Abs(v) > 0.1f)
         {
             Vector3 targetDir = new Vector3(h, , v);
             transform.LookAt(targetDir + transform.position);
             cc.SimpleMove(targetDir * speed);
         }

     }
 }