UI界面事件监听

事件监听方法

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;
using System;
using UnityEngine.UI;
/// 

/// 按钮监听
/// 
public class EventTriggerListener : UnityEngine.EventSystems.EventTrigger
{
    public delegate void VoidDelegate(GameObject go);
    public VoidDelegate onClick;
    public VoidDelegate onDown;
    public VoidDelegate onEnter;
    public VoidDelegate onExit;
    public VoidDelegate onUp;
    public VoidDelegate onSelect;
    public VoidDelegate onUpdateSelect;
    public VoidDelegate onDeselect;
    public VoidDelegate onCancel;
    static public EventTriggerListener Get(GameObject go)
    {
        EventTriggerListener listener = go.GetComponent();
        if (listener == null) listener = go.AddComponent();
        return listener;
    }


    public override void OnPointerClick(PointerEventData eventData)
    {
        if (onClick != null) onClick(gameObject);
    }
    public override void OnPointerDown(PointerEventData eventData)
    {
        if (onDown != null) onDown(gameObject);
    }
    public override void OnPointerEnter(PointerEventData eventData)
    {
        if (onEnter != null) onEnter(gameObject);
    }
    public override void OnPointerExit(PointerEventData eventData)
    {
        if (onExit != null) onExit(gameObject);
    }
    public override void OnPointerUp(PointerEventData eventData)
    {
        if (onUp != null) onUp(gameObject);
    }
    public override void OnSelect(BaseEventData eventData)
    {
        if (onSelect != null) onSelect(gameObject);
    }
    public override void OnUpdateSelected(BaseEventData eventData)
    {
        if (onUpdateSelect != null) onUpdateSelect(gameObject);
    }
    public override void OnDeselect(BaseEventData eventData)
    {
        if (onDeselect != null) onDeselect(gameObject);
    }
    public override void OnCancel(BaseEventData eventData)
    {
        if (onCancel != null) onCancel(gameObject);
    }
}

事件监听方法的调用

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using DG.Tweening;
/// 

/// 控制任务栏的显示和收回
/// 
namespace GameLogic.UI
{
    public class UIImageCtrl : MonoBehaviour
    {
        [SerializeField]
        private Toggle TaskCtrl_tog;//任务button
        [SerializeField]
        private Dropdown DropDown;//任务button

        [SerializeField]
        private Sprite show;//按钮的图片
        [SerializeField]
        private Sprite hide;//按钮的图片
        [SerializeField]
        private GameObject HideShowUI;//需要隐藏的UI；
        void Start()
        {
            if (DropDown != null)
            {
                EventTriggerListener.Get(DropDown.gameObject).onClick += DropDownOnClick;
                EventTriggerListener.Get(DropDown.gameObject).onSelect += DropDownOnSelect;
            }
        }

        public void OnClick()
        {
            if (TaskCtrl_tog != null)
            {
                if (TaskCtrl_tog.isOn)
                {
                    TaskCtrl_tog.image.sprite = hide;
                    if (HideShowUI)
                    {
                        HideShowUI.SetActive(false);
                    }
                }
                else
                {
                    TaskCtrl_tog.image.sprite = show;
                    if (HideShowUI)
                    {
                        HideShowUI.SetActive(true);
                    }
                }
            }
        }

        private void DropDownOnSelect(GameObject go)
        {
            Debug.Log("下啦列表关闭");
          DropDown.gameObject.GetComponent().sprite = show;
        }
        private void DropDownOnClick(GameObject go)
        {
            Debug.Log("下啦列表开启");
            DropDown.gameObject.GetComponent().sprite = hide;
        }
    }
}