58 lines
1.7 KiB
C#
58 lines
1.7 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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[RequireComponent(typeof(Toggle))]
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public class ExclusiveToggleVisual : MonoBehaviour
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{
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[Header("選中時圖片")]
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[SerializeField] private Sprite onBackground;
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[SerializeField] private Sprite onCheckmark;
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[Header("未選中時圖片（留空 = 原始圖）")]
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[SerializeField] private Sprite offBackground;
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[SerializeField] private Sprite offCheckmark;
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private Toggle toggle;
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private Image bgImage;
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private Image checkImage;
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private Sprite origBg, origCheck;
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private void Awake()
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{
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toggle = GetComponent<Toggle>();
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bgImage = toggle.targetGraphic as Image;
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checkImage = toggle.graphic as Image;
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// 儲存原始圖片（供 off 狀態使用）
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if (bgImage) origBg = bgImage.sprite;
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if (checkImage) origCheck = checkImage.sprite;
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// 關閉 UI 焦點干擾
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toggle.transition = Selectable.Transition.None;
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toggle.navigation = new Navigation { mode = Navigation.Mode.None };
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// 初始 + 監聽
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SyncVisual();
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toggle.onValueChanged.AddListener(_ => SyncVisual());
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}
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private void SyncVisual()
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{
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bool isOn = toggle.isOn;
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// 背景圖
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if (bgImage && onBackground)
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bgImage.sprite = isOn ? onBackground : (offBackground ?? origBg);
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// Checkmark 圖（僅在選中時顯示）
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if (checkImage)
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{
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if (onCheckmark)
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checkImage.sprite = isOn ? onCheckmark : (offCheckmark ?? origCheck);
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checkImage.enabled = isOn;
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}
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}
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// 外部可強制刷新（如動態換圖）
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public void Refresh() => SyncVisual();
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} |