Widget _buildRollingMessage(BuildContext context) {
    return TDButton(
        isBlock: true,
        text: '可滚动的通知',
        size: TDButtonSize.large,
        type: TDButtonType.outline,
        width: 450,
        theme: TDButtonTheme.primary,
        onTap: () {
          TDMessage.showMessage(
              context: context,
              visible: true,
              icon: false,
              marquee: MessageMarquee(speed: 5000, loop: 1, delay: 300),
              content: longContent,
              theme: MessageTheme.info,
              duration: 8000,
              onCloseBtnClick: () {
                print('Close button clicked!');
              });
        });
  }