Feat: 新增页面

entry/src/main/ets/pages/Hello.ets

@@ -1,7 +1,7 @@
 @Entry
 @Component
 struct Hello {
-  @State message: string = 'Hello World';
+  @State message: string = '基于鸿蒙开发';
 
   build() {
     Row() {

entry/src/main/ets/pages/Index.ets

@@ -40,13 +40,39 @@ struct Index {
       .onClick(() => {
         console.log("用户操作：点击按钮")
         let uiContext: UIContext = this.getUIContext();
-        let router = uiContext.getRouter();
-        router.pushUrl({
+        let router1 = uiContext.getRouter();
+        router1.pushUrl({
           url: 'pages/BMI'
         }).then(() => {
           console.log('系统提示：跳转成功')
         })
       })
+
+
+      Column() {
+        Button('[关于] 关于此应用')
+          .width('80%')
+          .height(50)
+          .type(ButtonType.Capsule)
+          .fontSize(18)
+          .fontWeight(FontWeight.Medium)
+          .backgroundColor('#4C61E4')
+          .margin({ bottom: 80 })
+      }
+      .width('100%')
+      .height('80%')
+      .justifyContent(FlexAlign.End)
+      .alignItems(HorizontalAlign.Center)
+      .onClick(() => {
+        console.log("用户操作：点击按钮")
+        let uiContext: UIContext = this.getUIContext();
+        let router2 = uiContext.getRouter();
+        router2.pushUrl({
+          url: 'pages/Hello'
+        }).then(() => {
+          console.log('系统提示：跳转成功')
+        })
+      })
     }
     .width('100%')
     .height('100%')