69 lines
2.0 KiB
C#
69 lines
2.0 KiB
C#
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using UnityEngine;
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using UnityEngine.UI;
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using UnityEngine.Events;
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namespace Kill.UI.Components
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{
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[RequireComponent(typeof(ScrollRect))]
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public class VerticalScrollLoader : MonoBehaviour
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{
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[Header("触发设置")]
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[Range(0, 1)]
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[Tooltip("滚动到多少比例时触发加载 (0-1)")]
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public float triggerThreshold = 0.8f;
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[Header("事件")]
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public UnityEvent onLoadTriggered; // 触发加载事件
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private ScrollRect scrollRect;
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private bool isLoading;
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private bool allDataLoaded; // 标记是否所有数据已加载完成
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private void Awake()
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{
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scrollRect = GetComponent<ScrollRect>();
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scrollRect.onValueChanged.AddListener(OnScrollValueChanged);
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allDataLoaded = false;
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}
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private void OnScrollValueChanged(Vector2 normalizedPosition)
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{
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// 如果正在加载或所有数据已加载完成，则不再触发
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if (isLoading || allDataLoaded) return;
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// 计算当前滚动位置比例（垂直滚动）
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float scrollPosition = 1 - normalizedPosition.y;
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// 如果滚动到阈值以下，触发加载
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if (scrollPosition >= triggerThreshold)
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{
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isLoading = true;
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onLoadTriggered.Invoke();
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}
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}
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/// <summary>
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/// 加载完成后调用此方法
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/// </summary>
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public void OnLoadComplete()
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{
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isLoading = false;
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}
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/// <summary>
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/// 当所有数据加载完成时调用此方法，停止触发加载
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/// </summary>
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public void SetAllDataLoaded()
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{
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allDataLoaded = true;
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}
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/// <summary>
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/// 重置加载状态（当有新数据可加载时调用）
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/// </summary>
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public void ResetLoader()
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{
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allDataLoaded = false;
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isLoading = false;
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}
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}
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}
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