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using UnityEngine.EventSystems; namespace UnityEngine.UI { /// <summary> /// 解决嵌套使用ScrollRect时的Drag冲突问题。请将该脚本放置到内层ScrollRect上(外层的ScrollRect的Drag事件会被内层的拦截) /// </summary> public class MultiScroll : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler { [SerializeField] private ScrollRect scroll_parent; private ScrollRect scroll_this; private float angle; [SerializeField] private bool horizontalOrVertical; private bool direction; void Awake() { scroll_this = GetComponent<ScrollRect>(); if (scroll_parent == null) scroll_parent = GetComponentsInParent<ScrollRect>()[1]; } public void OnBeginDrag(PointerEventData eventData) { scroll_parent.OnBeginDrag(eventData); } public void OnDrag(PointerEventData eventData) { scroll_parent.OnDrag(eventData); //判断拖动方向,防止水平与垂直方向同时响应导致的拖动时整个界面都会动 angle = Vector2.Angle(eventData.delta, Vector2.up); direction = angle > 45f && angle < 135f; if (direction) { //Horizontal scroll_parent.enabled = !horizontalOrVertical; scroll_this.enabled = horizontalOrVertical; } else { //Vertical scroll_this.enabled = !horizontalOrVertical; scroll_parent.enabled = horizontalOrVertical; } } public void OnEndDrag(PointerEventData eventData) { scroll_parent.OnEndDrag(eventData); scroll_parent.enabled = true; scroll_this.enabled = true; } } }