!20742 【Button】新增接口在文档中体现

Merge pull request !20742 from sunjiakun/ButtonDoc

zh-cn/application-dev/reference/arkui-ts/ts-basic-components-button.md

@@ -168,4 +168,42 @@ struct SwipeGestureExample {
 }
 ```
 
-![ifButton](figures/ifButton.gif)
+![ifButton](figures/ifButton.gif)
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+
+### 示例3 
+
+```ts
+// xxx.ets
+@Entry
+@Component
+struct buttonTestDemo {
+  @State txt: string = 'overflowTextOverlengthTextOverflow.Clip';
+  @State widthShortSize: number = 200;
+
+  build() {
+    Row() {
+      Column() {
+        Button(this.txt)
+          .width(this.widthShortSize)
+          .height(100)
+          .labelStyle({ overflow: TextOverflow.Clip,
+            maxLines: 1,
+            minFontSize: 20,
+            maxFontSize: 20,
+            font: {
+              size: 20,
+              weight: FontWeight.Bolder,
+              family: 'cursive',
+              style: FontStyle.Italic
+            }
+          })
+          .fontSize(40)
+      }
+      .width('100%')
+    }
+    .height('100%')
+  }
+}
+```
+
+![image-20230711171138661](figures/imageButtonLabelStyle.png)
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