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@@ -48,3 +48,5 @@ FineUI 100个问题题,带你走进FineUI的世界
 - [25、为什么不推荐使用同步的watch]()
 - [26、处理树结构的常用算法]()
 - [27、组件生命周期与Model状态控制](https://code.fineres.com/projects/BUSSINESS/repos/nuclear-webui/pull-requests/9193/diff/#packages/bi-webui/src/modules/conf/pack/analysis/transfer/operator/dimension/combo/combo.tsx)
+- [28、几个常用的布局场景]()
+- [29、BI.Layers.create参数详解原理]()
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+# 几个常用的布局场景
+
+## 1.上对齐的水平布局如何对齐?
+
+举一个反面例子
+
+![示例1](../images/26.png)
+![示例2](../images/27.png)
+
+
+缓存配置页面,一个水平方向布局,左侧是配置项名称,右侧是具体的配置细节. 可以很明显的看出,左右两段的水平并没有对齐
+
+如何通过布局来实现齐平呢
+
+一般情况下,只需要让左右两侧的元素保持相同高度即可
+
+```js
+const widget = {
+    type: "bi.horizontal",
+    verticalAlign: "top",
+    columnSize: [100, ""],
+    items: [
+        {
+            type: "bi.label",
+            height: 36,
+            text: "全局缓存策略",
+        }, {
+            type: "bi.vertical",
+            items: [
+                {
+                    type: "bi.single_select_radio_item",
+                    height: 36,
+                    text: "radio1",
+                }, {
+                    type: "bi.single_select_radio_item",
+                    height: 36,
+                    text: "radio2",
+                },
+            ],
+        },
+    ],
+};
+```
+
+![示例3](../images/28.png)
+
+如果是文本段落需要对齐的场景,对文本段落设置相应的行高即可.对于FineUI中label组件来说即为`textHeight`属性. FineUI中toast组件的布局方式就是如此,通过控制`textHeight`
+使得icon与文字对齐
+
+```js
+const widget = {
+    type: "bi.horizontal",
+    width: 300,
+    scrollx: false,
+    verticalAlign: "top",
+    columnSize: [100, "fill"],
+    items: [
+        {
+            type: "bi.label",
+            height: 36,
+            text: "全局缓存策略",
+        }, {
+            type: "bi.vertical",
+            items: [
+                {
+                    type: "bi.label",
+                    whiteSpace: "normal",
+                    textHeight: 36,
+                    text: "S2 定位是一个轻量级的表格渲染核心，所以没有 Excel/SpreadJS 那样复杂的功能和数据模型。在大数据表格组件这个场景下，其实不需要那么重的数据模型，S2 的轻量级设计是更合适的。在性能表现上，10 个Tab 切换时，切换耗时为 80ms，是老方案的 6倍。在 5 万条数据的情况下，S2 渲染和初始化只需要 1秒。是老方案的 8 倍。\n",
+                },
+            ],
+        },
+    ],
+};
+```
+
+![示例4](../images/30.png)
+
+## 2. 高度自适应的tab如何使用
+
+## 3. 让滚动条贴附在容器边缘的技巧
+
+日常业务中会出现滚动条,如果没有贴边显示的话,视觉效果会大打折扣.直接原因是一层又一层的布局嵌套,使得当前滚动的容器自身就已经脱离了页面区域.
+如何在不借助`padding`的情况下,让滚动条贴附在容器边缘呢?
+
+![示例5](../images/31.png)
+![示例6](../images/32.png)