HarmonyOS 鸿蒙Next router.back无法退出应用

import { common } from '@kit.AbilityKit';

import { BusinessError } from '@kit.BasicServicesKit';

@Entry

@Component

struct ExitPage {

  @State message: string = 'Hello World';

  context = getContext(this) as common.UIAbilityContext;

  Exit() {

    try {

      this.context.terminateSelf((err: BusinessError) => {

        if (err.code) {

          // 处理业务逻辑错误

          console.error(`terminateSelf failed, code is ${err.code}, message is ${err.message}`);

          return;

        }

        // 执行正常业务

        console.info('terminateSelf succeed');

      });

    } catch (err) {

      // 捕获同步的参数错误

      let code = (err as BusinessError).code;

      let message = (err as BusinessError).message;

      console.error(`terminateSelf failed, code is ${code}, message is ${message}`);

    }

  }

  build() {

    Column() {

      Text(this.message)

        .fontSize(50)

        .fontWeight(FontWeight.Bold)

      Button('退出应用')

        .onClick(() => {

          this.Exit()

        })

    }

    .width('100%')

  }

}