UGUI滑动多选

使用EventTrigger来实现

只能检测挂载EventTrigger组件的子对象

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

public class EventTriggerController : MonoBehaviour
{

    void Awake()
    {
        
        EventTrigger eventTrigger = gameObject.AddComponent<EventTrigger>();

        EventTrigger.TriggerEvent pointerDown = new EventTrigger.TriggerEvent();
        EventTrigger.TriggerEvent move = new EventTrigger.TriggerEvent();
        EventTrigger.TriggerEvent pointeUp = new EventTrigger.TriggerEvent();

        pointerDown.AddListener(OnPointerDown);
        move.AddListener(OnMove);
        pointeUp.AddListener(OnPointerUp);

        eventTrigger.triggers.Add(new EventTrigger.Entry() { eventID = EventTriggerType.PointerDown, callback = pointerDown });
        eventTrigger.triggers.Add(new EventTrigger.Entry() { eventID = EventTriggerType.Drag, callback = move });
        eventTrigger.triggers.Add(new EventTrigger.Entry() { eventID = EventTriggerType.PointerUp, callback = pointeUp });

    }


    private void OnPointerDown(BaseEventData eventData)
    {
        GetRaycastResult((eventData as PointerEventData).position);
    }

    private void OnMove(BaseEventData eventData)
    {
        GetRaycastResult((eventData as PointerEventData).position);
    }

    private void OnPointerUp(BaseEventData eventData)
    {
        GetRaycastResult((eventData as PointerEventData).position);
    }

    private List<RaycastResult> GetRaycastResult(Vector2 pos)
    {
        List<RaycastResult> raycastResults = new List<RaycastResult>();

        PointerEventData eventData = new PointerEventData(EventSystem.current);
        eventData.position = pos;
        EventSystem.current.RaycastAll(eventData, raycastResults);

        for (int i = 0; i < raycastResults.Count; i++)
        {
            Debug.Log($"射线碰到了UI对象:{raycastResults[i].gameObject.name}");
        }
        return raycastResults;
    }
}

示例.jpeg