From c3c8ff7745001e142b83058660883570f157b88d Mon Sep 17 00:00:00 2001
From: lhlyu <misakafs@gmail.com>
Date: Sun, 17 Dec 2023 18:29:10 +0800
Subject: [PATCH] update

---
 src/example/Example.vue     | 32 ++++++++++++++++++++++++--------
 src/example/useWaterfall.ts |  3 ++-
 2 files changed, 26 insertions(+), 9 deletions(-)

diff --git a/src/example/Example.vue b/src/example/Example.vue
index 64f46fe..19bffa4 100644
--- a/src/example/Example.vue
+++ b/src/example/Example.vue
@@ -3,7 +3,7 @@
     <VirtualWaterfall
         :virtual="waterfallOption.virtual"
         :gap="waterfallOption.gap"
-        :preload-screen-count="waterfallOption.preloadScreenCount"
+        :preload-screen-count="[waterfallOption.topPreloadScreenCount, waterfallOption.bottomPreloadScreenCount]"
         :item-min-width="waterfallOption.itemMinWidth"
         :max-column-count="waterfallOption.maxColumnCount"
         :min-column-count="waterfallOption.minColumnCount"
@@ -75,7 +75,7 @@
                 </div>
             </div>
             <div class="form-group form-group-sm mb-2">
-                <label class="form-label fs-6">最小列数 <code>[0:{{ waterfallOption.maxColumnCount }}]</code></label>
+                <label class="form-label fs-6">最小列数 <code>[0:{{ waterfallOption.maxColumnCount }}]</code>，最大列数 <code>[{{ waterfallOption.minColumnCount }}:10]</code></label>
                 <div class="input-group input-group-sm">
                     <input
                         type="number"
@@ -90,11 +90,6 @@
                         id="basic-addon1"
                         >列</span
                     >
-                </div>
-            </div>
-            <div class="form-group form-group-sm mb-2">
-                <label class="form-label fs-6">最大列数 <code>[{{ waterfallOption.minColumnCount }}:10]</code></label>
-                <div class="input-group input-group-sm">
                     <input
                         type="number"
                         class="form-control"
@@ -106,10 +101,31 @@
                     <span
                         class="input-group-text"
                         id="basic-addon1"
-                        >列</span
+                    >列</span
                     >
                 </div>
             </div>
+            <div class="form-group form-group-sm mb-2">
+                <label class="form-label fs-6">(顶部/底部)预加载屏 <code>[0:5]</code></label>
+                <div class="input-group input-group-sm">
+                    <input
+                        type="number"
+                        class="form-control"
+                        v-model="waterfallOption.topPreloadScreenCount"
+                        min="0"
+                        max="5"
+                        step="1"
+                    />
+                    <input
+                        type="number"
+                        class="form-control"
+                        v-model="waterfallOption.bottomPreloadScreenCount"
+                        min="0"
+                        max="5"
+                        step="1"
+                    />
+                </div>
+            </div>
             <div class="form-group form-group-sm form-check form-switch mb-1">
                 <label class="form-label fs-6">开启虚拟列表</label>
                 <input
diff --git a/src/example/useWaterfall.ts b/src/example/useWaterfall.ts
index a4f65e7..2d2704f 100644
--- a/src/example/useWaterfall.ts
+++ b/src/example/useWaterfall.ts
@@ -55,7 +55,8 @@ const useWaterfall = () => {
         bottomDistance: 0,
         // 是否只展示图片，这是自定义加的一个属性
         onlyImage: false,
-        preloadScreenCount: [1, 0] as [number, number],
+        topPreloadScreenCount: 1,
+        bottomPreloadScreenCount: 0,
         virtual: true,
         gap: 15,
         itemMinWidth: 220,