using UnityEngine;
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/// <summary>
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/// 安全区域适配组件 - 自动适配刘海屏和异形屏
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/// </summary>
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[RequireComponent(typeof(RectTransform))]
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[ExecuteInEditMode]
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public class SafeAreaAdapter : MonoBehaviour
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{
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[Header("适配设置")]
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[Tooltip("是否在编辑器模式下模拟安全区域")]
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public bool simulateInEditor = false;
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[Tooltip("适配边缘（Top, Bottom, Left, Right）")]
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public bool adaptTop = true;
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public bool adaptBottom = true;
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public bool adaptLeft = true;
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public bool adaptRight = true;
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[Header("调试信息")]
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[SerializeField] private Rect currentSafeArea;
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[SerializeField] private Vector2Int screenSize;
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private RectTransform _rectTransform;
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private Rect _lastSafeArea = Rect.zero;
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private Vector2Int _lastScreenSize = Vector2Int.zero;
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private void Awake()
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{
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_rectTransform = GetComponent<RectTransform>();
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ApplySafeArea();
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}
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private void Update()
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{
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// 检测屏幕变化或安全区域变化
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if (HasScreenChanged())
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{
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ApplySafeArea();
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}
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}
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/// <summary>
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/// 检测屏幕是否发生变化
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/// </summary>
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private bool HasScreenChanged()
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{
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Rect safeArea = GetSafeArea();
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Vector2Int screenSize = new Vector2Int(Screen.width, Screen.height);
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bool changed = safeArea != _lastSafeArea || screenSize != _lastScreenSize;
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_lastSafeArea = safeArea;
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_lastScreenSize = screenSize;
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return changed;
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}
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/// <summary>
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/// 获取安全区域
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/// </summary>
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private Rect GetSafeArea()
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{
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#if UNITY_EDITOR
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if (simulateInEditor)
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{
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// 编辑器模式下模拟 iPhone X 的安全区域
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float screenWidth = Screen.width;
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float screenHeight = Screen.height;
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// 模拟刘海（顶部 44px）和底部手势条（底部 34px）
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float topInset = 44f;
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float bottomInset = 34f;
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float leftInset = 0f;
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float rightInset = 0f;
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return new Rect(
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leftInset,
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bottomInset,
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screenWidth - leftInset - rightInset,
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screenHeight - topInset - bottomInset
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);
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}
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#endif
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return Screen.safeArea;
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}
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/// <summary>
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/// 应用安全区域适配
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/// </summary>
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private void ApplySafeArea()
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{
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if (_rectTransform == null)
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return;
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Rect safeArea = GetSafeArea();
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currentSafeArea = safeArea;
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screenSize = new Vector2Int(Screen.width, Screen.height);
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// 计算锚点位置
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Vector2 anchorMin = safeArea.position;
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Vector2 anchorMax = safeArea.position + safeArea.size;
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// 转换为标准化坐标 (0-1)
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anchorMin.x /= Screen.width;
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anchorMin.y /= Screen.height;
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anchorMax.x /= Screen.width;
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anchorMax.y /= Screen.height;
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// 根据设置决定是否适配各个边缘
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Vector2 finalAnchorMin = _rectTransform.anchorMin;
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Vector2 finalAnchorMax = _rectTransform.anchorMax;
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if (adaptLeft)
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finalAnchorMin.x = anchorMin.x;
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if (adaptBottom)
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finalAnchorMin.y = anchorMin.y;
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if (adaptRight)
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finalAnchorMax.x = anchorMax.x;
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if (adaptTop)
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finalAnchorMax.y = anchorMax.y;
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_rectTransform.anchorMin = finalAnchorMin;
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_rectTransform.anchorMax = finalAnchorMax;
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// 重置偏移
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_rectTransform.offsetMin = Vector2.zero;
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_rectTransform.offsetMax = Vector2.zero;
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Debug.Log($"[SafeAreaAdapter] 安全区域已应用: {safeArea}, 屏幕: {screenSize}");
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}
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/// <summary>
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/// 强制重新应用安全区域
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/// </summary>
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public void ForceApply()
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{
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ApplySafeArea();
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}
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#if UNITY_EDITOR
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private void OnValidate()
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{
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if (_rectTransform == null)
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_rectTransform = GetComponent<RectTransform>();
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ApplySafeArea();
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}
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#endif
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}
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