Unity3D实现虚拟按钮控制人物移动效果

using System.Collections;using UnityEngine;using UnityEngine.EventSystems;using UnityEngine.UI; public class MyJoystick : MonoBehaviour, IPointerDownHandler, IPointerUpHandler {  public Canvas canvas; public static float h;  //h和v的值传回给player脚本，使得物体移动 public static float v;  private bool isPress = false; //Button按钮是否按下 private Vector2 touchPos = Vector2.zero; //按下的位置  void Update() {  if (isPress)  {   RectTransformUtility.ScreenPointToLocalPointInRectangle(canvas.transform as RectTransform,    Input.mousePosition, null, out touchPos);    //根据Canvas和Image的Rectransform位置相减得出   touchPos += new Vector2(427, 299);     float distance = Vector2.Distance(Vector2.zero, touchPos);    if (distance > 52) { //限制Button不能超出Image位置（两者位置相减得出52）    touchPos = touchPos.normalized*52;    transform.localPosition = touchPos;   }   else   {    transform.localPosition = touchPos;   }    h = touchPos.x / 52;   v = touchPos.y / 52;  }  }  //鼠标按下时触发 public void OnPointerDown(PointerEventData eventData) {  isPress = true; }  //鼠标按键弹起时触发 public void OnPointerUp(PointerEventData eventData) {  isPress = false;  transform.localPosition = Vector3.zero; } }

using System.Collections;using System.Collections.Generic;using UnityEngine; public class PlayerMove : MonoBehaviour {  public float speed = 0.1f;  private float h = 0; private float v = 0;  void Update() {  //首先检测虚拟按键有没有移动，没有再选择键盘输入  if (Mathf.Abs(MyJoystick.h) > 0 || Mathf.Abs(MyJoystick.v) > 0) {   h = MyJoystick.h;   v = MyJoystick.v;  }  else{   h = Input.GetAxis("Horizontal");   v = Input.GetAxis("Vertical");  }  //玩家位置移动  if (Mathf.Abs(h) > 0.1 || Mathf.Abs(v) > 0.1) {   Vector3 targetDir = new Vector3(h, 0, v);   transform.position += targetDir * speed;    transform.LookAt(transform.position+targetDir);  }   }}