目錄

• • 簡介
  • UGUI實(shí)現(xiàn)虛擬搖桿原理
  • 功能實(shí)現(xiàn)
  • 資源下載

簡介

虛擬搖桿在手游中是重要組成部分，Unity的UGUI可很容易實(shí)現(xiàn)虛擬搖桿功能。大致分成三部分介紹。第一部分介紹如何通過UGUI實(shí)現(xiàn)虛擬搖桿功能。第二部分介紹如何通過虛擬搖桿控制物體移動和旋轉(zhuǎn)。第三部分介紹如何用Entitas、Ecs框架結(jié)合JobSystem實(shí)現(xiàn)虛擬搖桿功能。

UGUI實(shí)現(xiàn)虛擬搖桿原理

• 利用IBeginDragHandler,IDragHandler,IEndDragHandler接口實(shí)現(xiàn)對控件拖動事件的監(jiān)聽
• 在OnDrag事件中利用函數(shù)RectTransformUtility.ScreenPointToLocalPointInRectangle設(shè)置拖拽位置

功能實(shí)現(xiàn)

• 布局（最外層為panel，JoyStick為背景圖片，Handle_Ridged為中間圓盤）
  
• 代碼

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.EventSystems; using System;[RequireComponent(typeof(RectTransform))] public class JoyStickHandle : MonoBehaviour,IBeginDragHandler,IDragHandler,IEndDragHandler{public event Action OnBeginDragEvent = delegate { }; public event Action<Vector2> OnDragEvent = delegate(Vector2 vector2) { };public event Action OnEndDragEvent = delegate { };public RectTransform rtJoyStick;private Transform tfHandle;private float radius = 0f;private float limit = 0f;private Vector2 targetPos;public Vector2 TargetPos{get { return targetPos; }private set { }}// Use this for initializationvoid Start (){tfHandle = this.GetComponent<RectTransform>();radius = (rtJoyStick.rect.xMax - rtJoyStick.rect.xMin) / 2;limit = radius * radius;}public void OnBeginDrag(PointerEventData eventData){if (OnBeginDragEvent != null){OnBeginDragEvent();}}public void OnDrag(PointerEventData eventData){if (RectTransformUtility.ScreenPointToLocalPointInRectangle(rtJoyStick, eventData.position,eventData.pressEventCamera, out targetPos)){DealDragEvent();}}private void DealDragEvent(){if (targetPos.sqrMagnitude > limit){targetPos = targetPos.normalized * radius;}tfHandle.localPosition = targetPos;if (OnDragEvent != null){OnDragEvent(targetPos);}}public void OnEndDrag(PointerEventData eventData){tfHandle.localPosition = Vector3.zero;targetPos = Vector2.zero;if (OnEndDragEvent != null){OnEndDragEvent();}} }

資源下載

https://download.csdn.net/download/eie08027/10750360

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