Widget _buildCustomSpeedLoading(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.spaceAround,
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          TDLoading(
            size: TDLoadingSize.small,
            icon: TDLoadingIcon.circle,
            axis: Axis.horizontal,
            text: '加载中…',
            duration: _currentSliderValue.round(),
          ),
          Slider(
            value: _currentSliderValue,
            max: 2000,
            min: -20,
            divisions: 100,
            label: _currentSliderValue.round().toString(),
            onChanged: (double value) {
              setState(() {
                _currentSliderValue = value;
              });
            },
          ),
        ],
      ),
    );
  }