Unity实现简单摇杆的制作 Unity实现简单摇杆的制作

利用UGUI制作一个简单摇杆，效果图

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1、首先建立两个Image,然后将其中一个为父物体，另一个为子物体，并且调整好大小:

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ps:将子物体的锚点设置为居中
2、在父物体上写个JoyStick.cs脚本：

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using UnityEngine; using UnityEngine.EventSystems; using System.Collections; public class JoyStick : MonoBehaviour, IDragHandler, IEndDragHandler, IBeginDragHandler{public static float h, v; //传出hvpublic float maxDis; //最大距离 private RectTransform childRectTrans; private Coroutine coroutine = null; void Start(){childRectTrans = transform.GetChild(0) as RectTransform; }public void OnBeginDrag(PointerEventData eventData){if (coroutine != null){StopCoroutine(coroutine); coroutine = null; }}public void OnDrag(PointerEventData eventData){Vector3 outPos; if (RectTransformUtility.ScreenPointToWorldPointInRectangle(this.transform as RectTransform, eventData.position, eventData.pressEventCamera, out outPos)){childRectTrans.position = outPos; //限制拖拽距离childRectTrans.anchoredPosition = Vector2.ClampMagnitude(childRectTrans.anchoredPosition, maxDis); //或者利用子物体和父物体的距离判断是否超过最大距离，当距离大于等于最大的距离时候，//计算父物体和子物体的向量，然后利用向量*最大距离来限制拖拽距离//if (Vector2.Distance(childRectTrans.position, this.transform.position) > maxDis)//{//Vector2 dir = (childRectTrans.position - this.transform.position).normalized; //childRectTrans.anchoredPosition = dir * maxDis; //}GetHV(); }} public void OnEndDrag(PointerEventData eventData){//当结束拖动，要将物体归0,为了加一点缓冲效果//(1)可以使用dotween等补间动画插件,会减少很多//rectTransform.DoAnchoredPos(Vector2.zero,0.5f); //(2)或者使用携程这里使用携程if (coroutine == null)coroutine = StartCoroutine(IEToZeroPos(childRectTrans, 0.1f)); }private void GetHV(){h = childRectTrans.anchoredPosition.x / maxDis; v = childRectTrans.anchoredPosition.y / maxDis; }private IEnumerator IEToZeroPos(RectTransform rectTransform, float duartion){if (duartion == 0f){yield return null; rectTransform.anchoredPosition = Vector2.zero; GetHV(); coroutine = null; yield break; }Vector2 currentpos = rectTransform.anchoredPosition; float offx = currentpos.x / duartion; float offy = currentpos.y / duartion; while (rectTransform.anchoredPosition != Vector2.zero){yield return null; rectTransform.anchoredPosition = new Vector2(rectTransform.anchoredPosition.x - offx * Time.deltaTime, rectTransform.anchoredPosition.y - offy * Time.deltaTime); GetHV(); if (rectTransform.anchoredPosition.sqrMagnitude < 8f){rectTransform.anchoredPosition = Vector2.zero; GetHV(); coroutine = null; break; }}}}

另外附上Cube上面的脚本

private void Update(){Vector3 dir = new Vector3(JoyStick.h, 0, JoyStick.v); if (dir.sqrMagnitude > 0){transform.Translate(dir * 3f * Time.deltaTime,Space.World); Quaternion targatRotate = Quaternion.LookRotation(dir, Vector3.up); transform.rotation = Quaternion.Slerp(transform.rotation, targatRotate, 3 * Time.deltaTime); }}

加个使用doTween的吧

using UnityEngine; using UnityEngine.EventSystems; using System.Collections; using DG.Tweening; public class JoyStick : MonoBehaviour, IDragHandler, IEndDragHandler, IBeginDragHandler{public static float h, v; //传出hvpublic float maxDis; //最大距离 private RectTransform childRectTrans; private Coroutine coroutine = null; void Start(){childRectTrans = transform.GetChild(0) as RectTransform; }public void OnBeginDrag(PointerEventData eventData){if (coroutine != null){StopCoroutine(coroutine); coroutine = null; }}public void OnDrag(PointerEventData eventData){Vector3 outPos; if (RectTransformUtility.ScreenPointToWorldPointInRectangle(this.transform as RectTransform, eventData.position, eventData.pressEventCamera, out outPos)){childRectTrans.position = outPos; //限制拖拽距离childRectTrans.anchoredPosition = Vector2.ClampMagnitude(childRectTrans.anchoredPosition, maxDis); //或者利用子物体和父物体的距离判断是否超过最大距离，当距离大于等于最大的距离时候，//计算父物体和子物体的向量，然后利用向量*最大距离来限制拖拽距离//if (Vector2.Distance(childRectTrans.position, this.transform.position) > maxDis)//{//Vector2 dir = (childRectTrans.position - this.transform.position).normalized; //childRectTrans.anchoredPosition = dir * maxDis; //}GetHV(); }} public void OnEndDrag(PointerEventData eventData){//当结束拖动，要将物体归0,为了加一点缓冲效果//(1)可以使用dotween等补间动画插件,会减少很多rectTransform.DoAnchoredPos(Vector2.zero,0.5f).OnUpdate(GetHV); }private void GetHV(){h = childRectTrans.anchoredPosition.x / maxDis; v = childRectTrans.anchoredPosition.y / maxDis; }}

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