更新滚动方法

src/directive/scroll/scroll.js

@@ -32,16 +32,22 @@ const InfiniteScroll = {
   },
   
   unbind(el) {
-    // 解绑事件
+    // 解绑事件 - 添加安全检查
     if (el.__infinite_scroll_container && el.__infinite_scroll_handler) {
       unbindEvents(el, el.__infinite_scroll_container, el.__infinite_scroll_handler);
     }
     
-    // 清理引用
+    // 清理引用 - 确保安全清理
+    if (el.__infinite_scroll_container) {
       delete el.__infinite_scroll_container;
+    }
+    if (el.__infinite_scroll_handler) {
       delete el.__infinite_scroll_handler;
+    }
+    if (el.__infinite_scroll_options) {
       delete el.__infinite_scroll_options;
     }
+  }
 };
 
 // 解析配置选项
@@ -61,13 +67,19 @@ function createScrollHandler(el, binding, vnode) {
   return function() {
     const options = el.__infinite_scroll_options;
     
+    // 添加完整的安全检查 - 确保 options 存在
+    if (!options) return;
+    
     // 检查是否禁用
-    if (options && options.disabled) return;
+    if (options.disabled) return;
     
     const scrollContainer = el.__infinite_scroll_container;
-    const isBottom = isScrollBottom(scrollContainer, el, options.distance);
+    // 确保滚动容器存在
+    if (!scrollContainer) return;
     
-    if (isBottom) {
+    const isBottom = isScrollBottom(scrollContainer, el, options.distance || 30);
+    
+    if (isBottom && typeof options.loadMore === 'function') {
       // 调用加载函数
       options.loadMore();
     }
@@ -115,18 +127,28 @@ function getScrollContainer(el) {
 
 // 判断是否滚动到底部
 function isScrollBottom(scrollContainer, el, distance = 30) {
+  // 添加安全检查
+  if (!scrollContainer || !el) return false;
+  
+  // 确保 distance 是数字
+  const safeDistance = typeof distance === 'number' ? distance : 30;
+  
   // window情况
   if (scrollContainer === window) {
     return (
       Math.ceil(window.innerHeight + window.pageYOffset) >= 
-      document.documentElement.scrollHeight - distance
+      document.documentElement.scrollHeight - safeDistance
     );
   }
   
-  // DOM元素情况
+  // DOM元素情况 - 添加安全检查
+  if (!scrollContainer.scrollTop && scrollContainer.scrollTop !== 0) return false;
+  if (!scrollContainer.clientHeight) return false;
+  if (!scrollContainer.scrollHeight) return false;
+  
   return (
     Math.ceil(scrollContainer.scrollTop + scrollContainer.clientHeight) >= 
-    scrollContainer.scrollHeight - distance
+    scrollContainer.scrollHeight - safeDistance
   );
 }