Flutter基础widgets教程-Slider篇

const Switch({
    Key key,
    @required this.value,undefined    @required this.onChanged,undefined    this.onChangeStart,
    this.onChangeEnd,
    this.min = 0.0,
    this.max = 1.0,
    this.divisions, 
    this.label,undefined    this.activeColor,undefined    this.inactiveColor, 
    this.semanticFormatterCallback,
})

activeColor: Colors.blue,

divisions: 10,

inactiveColor: Colors.black12,

label: '标签',

max:10,

min:0,

onChanged: (double){
    setState(() {
        progressValue=double.roundToDouble();
    });
},

onChangeEnd:(double){
    print(double);
} 

onChangeStart: (double){
    print(double);
},

value:8,