Unity自定义Button实现点击缩小松开放大的功能-Toy模板网

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Unity自定义Button实现点击缩小松开放大的功能

代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using System;
using System.Threading.Tasks;
/// 事件类型
public enum UIButtonEvent
{
    CLICK,
    DOWN,
    UP,
    EXIT,
    PRESS,
}

public class UIButton : MonoBehaviour, IPointerClickHandler, IPointerDownHandler, IPointerUpHandler, IPointerEnterHandler, IPointerExitHandler
{

    private event Action<UIButton> onClick;
    private event Action<UIButton> onDown;
    private event Action<UIButton> onUp;
    private event Action<UIButton> onExit;
    private event Action<UIButton> onPress;
    private bool isSelected;
    private bool isDisabled;
    public float scaleDuration = 0.1f;  //缩放动画的持续时间
    public float clickTime = 0.2f;  //点击的最短时间
    public float longPressTime = 1f;  //长按的最短时间
    private bool isPressed = false;  //是否按下
    private bool isLongPressed = false;  //是否长按
    private bool isClicked = false;  //是否点击
    private float pressTime = 0f;  //按下的时间

    public void AddListener(Action<UIButton> action, UIButtonEvent buttonEvent = UIButtonEvent.CLICK)
    {
        switch (buttonEvent)
        {
            case UIButtonEvent.CLICK: onClick += action; break;
            case UIButtonEvent.DOWN: onDown += action; break;
            case UIButtonEvent.UP: onUp += action; break;
            case UIButtonEvent.EXIT: onExit += action; break;
            case UIButtonEvent.PRESS: onPress += action; break;
        }
    }
    public void RemoveAllListeners()
    {
        onClick = null;
        onDown = null;
        onExit = null;
        onPress = null;
        onUp = null;
    }
    private async Task ScaleDown()  //缩小按钮的方法
    {
        float scale = 0.9f;  //缩小的比例
        Vector3 originalScale = transform.localScale;  //记录原始的比例
        Vector3 targetScale = originalScale * scale;  //计算目标比例
        float startTime = Time.time;  //记录开始时间
        while (Time.time - startTime < scaleDuration)  //在规定的时间内循环执行
        {
            transform.localScale = Vector3.Lerp(originalScale, targetScale, (Time.time - startTime) / scaleDuration);  //根据时间差计算当前比例
            await Task.Yield();  //等待一帧
        }
    }

    private async Task ScaleUp()  //放大按钮的方法
    {
        Vector3 originalScale = transform.localScale;  //记录原始的比例
        Vector3 targetScale = Vector3.one;  //计算目标比例
        float startTime = Time.time;  //记录开始时间
        while (Time.time - startTime < scaleDuration)  //在规定的时间内循环执行
        {
            transform.localScale = Vector3.Lerp(originalScale, targetScale, (Time.time - startTime) / scaleDuration);  //根据时间差计算当前比例
            await Task.Yield();  //等待一帧
        }
    }

    public void OnPointerClick(PointerEventData eventData)  //点击事件的回调函数
    {
        if (isPressed && !isLongPressed)  //如果是点击事件
        {
            isClicked = true;  //标记为点击
            //Debug.Log("Button Clicked!");
        }
        onClick?.Invoke(this);
    }

    public void OnPointerDown(PointerEventData eventData)  //按下事件的回调函数
    {
        isPressed = true;  //标记为按下
        pressTime = Time.time;  //记录按下时间
        isLongPressed = false;  //重置长按标记
        ScaleDown();  //缩小按钮
    }

    public void OnPointerUp(PointerEventData eventData)  //松开事件的回调函数
    {
        isPressed = false;  //标记为松开
        if (Time.time - pressTime > clickTime && !isClicked)  //如果按下时间超过最短点击时间且不是点击事件
        {
            isLongPressed = true;  //标记为长按
            //Debug.Log("Button Long Pressed!");
        }
        ScaleUp();  //放大按钮
        isClicked = false;  //重置点击标记
    }

    public void OnPointerEnter(PointerEventData eventData)  //进入按钮区域的回调函数
    {
        //无需实现
    }

    public void OnPointerExit(PointerEventData eventData)  //离开按钮区域的回调函数
    {
        isPressed = false;  //标记为松开
        ScaleUp();  //放大按钮
        isClicked = false;  //重置点击标记
    }

}