68 lines
2.3 KiB
C#
68 lines
2.3 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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using BaseGames.Core;
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namespace BaseGames.UI
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{
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/// <summary>
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/// 将 <see cref="ISettingsService"/>.<c>Current.UIScale</c> 应用到挂载的
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/// <see cref="CanvasScaler"/>。挂在每个根 Canvas 上即可。
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///
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/// 实现要点：
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/// · 记录 Inspector 初始的 <c>scaleFactor</c> / <c>referenceResolution</c> 作为基准值，
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/// 避免反复缩放导致的累积漂移；
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/// · 订阅 <see cref="SettingsManager.SettingsChanged"/> 在玩家调整后即时刷新；
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/// · 兼容 <see cref="CanvasScaler.ScaleMode.ScaleWithScreenSize"/> 与
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/// <see cref="CanvasScaler.ScaleMode.ConstantPixelSize"/> 两种模式。
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/// </summary>
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[DisallowMultipleComponent]
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[RequireComponent(typeof(CanvasScaler))]
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public class UIScaleApplier : MonoBehaviour
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{
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private CanvasScaler _scaler;
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private float _baseScaleFactor;
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private Vector2 _baseReferenceResolution;
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private void Awake()
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{
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_scaler = GetComponent<CanvasScaler>();
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_baseScaleFactor = _scaler.scaleFactor;
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_baseReferenceResolution = _scaler.referenceResolution;
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}
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private void OnEnable()
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{
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SettingsManager.SettingsChanged += OnSettingsChanged;
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Apply();
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}
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private void OnDisable()
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{
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SettingsManager.SettingsChanged -= OnSettingsChanged;
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}
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private void OnSettingsChanged(GlobalSettingsData _) => Apply();
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private void Apply()
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{
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var svc = ServiceLocator.GetOrDefault<ISettingsService>();
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float ui = svc?.Current?.UIScale ?? 1f;
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if (ui <= 0f) ui = 1f;
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switch (_scaler.uiScaleMode)
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{
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case CanvasScaler.ScaleMode.ConstantPixelSize:
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_scaler.scaleFactor = _baseScaleFactor * ui;
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break;
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case CanvasScaler.ScaleMode.ScaleWithScreenSize:
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// 缩小参考分辨率 → 等价于放大 UI。
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_scaler.referenceResolution = _baseReferenceResolution / ui;
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break;
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default:
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_scaler.scaleFactor = _baseScaleFactor * ui;
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break;
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}
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}
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}
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}
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