update zh-cn/application-dev/faqs/faqs-arkui-component.md.

Signed-off-by: NLiAn <lian15@huawei.com>
Signed-off-by: NLiAn <lian15@huawei.com>

zh-cn/application-dev/faqs/faqs-arkui-component.md

@@ -701,3 +701,64 @@ struct MyComponent {
 **参考链接**
 
 焦点控制：[焦点控制](../reference/arkui-ts/ts-universal-attributes-focus.md)
+
+## SideBarContainer如何设置controlButton属性
+
+适用于 OpenHarmony 3.2 Beta5，API9
+
+**解决措施**
+
+示例代码：
+
+```
+@Entry
+@Component
+struct SideBarContainerExample {
+  normalIcon : Resource = $r("app.media.icon")
+  selectedIcon: Resource = $r("app.media.icon")
+  @State arr: number[] = [1, 2, 3]
+  @State current: number = 1
+
+  build() {
+    SideBarContainer(SideBarContainerType.Embed)
+    {
+      Column() {
+        ForEach(this.arr, (item, index) => {
+          Column({ space: 5 }) {
+            Image(this.current === item ? this.selectedIcon : this.normalIcon).width(64).height(64)
+            Text("Index0" + item)
+              .fontSize(25)
+              .fontColor(this.current === item ? '#0A59F7' : '#999')
+              .fontFamily('source-sans-pro,cursive,sans-serif')
+          }
+          .onClick(() => {
+            this.current = item
+          })
+        }, item => item)
+      }.width('100%')
+      .justifyContent(FlexAlign.SpaceEvenly)
+      .backgroundColor('#19000000')
+
+
+      Column() {
+        Text('SideBarContainer content text1').fontSize(25)
+        Text('SideBarContainer content text2').fontSize(25)
+      }
+      .margin({ top: 50, left: 20, right: 30 })
+    }
+    .sideBarWidth(150)
+    .minSideBarWidth(50)
+    .controlButton({left:32,
+      top:32,
+      width:32,
+      height:32, 
+      icons:{shown: $r("app.media.icon"),
+        hidden: $r("app.media.icon"),
+        switching: $r("app.media.icon")}})
+    .maxSideBarWidth(300)
+    .onChange((value: boolean) => {
+      console.info('status:' + value)
+    })
+  }
+}
+```