51 lines
1.6 KiB
C#
51 lines
1.6 KiB
C#
using DG.Tweening;
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using UnityEngine;
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using UnityEngine.EventSystems;
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/// <summary>
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/// 按下缩小、抬起还原。
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/// 只实现 IPointerDownHandler / IPointerUpHandler，不实现 IDragHandler 等拖动接口，
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/// 所以挂在 ScrollRect 内的按钮上不会抢走 ScrollRect 的滑动。
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/// </summary>
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public class UIPressScale : MonoBehaviour, IPointerDownHandler, IPointerUpHandler
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{
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[Tooltip("缩放目标，留空则缩放自身")]
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public Transform target;
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public float pressScale = 0.95f; // 按下时缩放比例
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public float duration = 0.1f; // 缩放动画时长
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private Vector3 _standardScale;
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private bool _captured;
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private bool _isPressing;
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private Transform Target => target != null ? target : transform;
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public void OnPointerDown(PointerEventData eventData) => SetPressing(true);
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public void OnPointerUp(PointerEventData eventData) => SetPressing(false);
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private void SetPressing(bool pressing)
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{
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if (_isPressing == pressing) return;
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_isPressing = pressing;
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var t = Target;
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if (!_captured)
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{
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_standardScale = t.localScale; // 首次使用时记录原缩放
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_captured = true;
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}
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t.DOKill();
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t.DOScale(pressing ? _standardScale * pressScale : _standardScale, duration)
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.SetEase(Ease.OutQuad);
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}
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// 被隐藏时立即还原，避免按下瞬间目标被关掉而停在缩小状态
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private void OnDisable()
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{
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_isPressing = false;
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if (!_captured) return;
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Target.DOKill();
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Target.localScale = _standardScale;
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}
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}
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