【Flutter】九、Flutter之滑动条——Slider

一、Slider

Slider是Flutter中的滑动条组件。

1.1 Slider构造器

const Slider({
   
    Key key,
    @required this.value,
    @required this.onChanged,
    this.onChangeStart,
    this.onChangeEnd,
    this.min = 0.0,
    this.max = 1.0,
    this.divisions,
    this.label,
    this.activeColor,
    this.inactiveColor,
    this.semanticFormatterCallback,
  }) : _sliderType = _SliderType.material,
       assert(value != null),
       assert(min != null),
       assert(max != null),
       assert(min <= max),
       assert(value >= min && value <= max),
       assert(divisions == null || divisions