flutter滑动按钮

对于想实现滑动按钮功能的人来说，其实还是非常简单的设置，如下图：

image.png

实现这样功能的代码其实不难，这里谢了一个demo，供参考：

import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';

/**
 * 滑动按钮
 */
void main() {
  runApp(myApp());
}

class myApp extends StatelessWidget{

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return MaterialApp(
      title: 'fade demo',
      theme: ThemeData(
        primarySwatch: Colors.blue
      ),
      home: CupertinoSliderDemo()
    );
  }
}

class CupertinoSliderDemo extends StatefulWidget{
  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return _CupertinoSliderDemo();
  }
}

class _CupertinoSliderDemo extends State<CupertinoSliderDemo>{

  double _value = 1.0;

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return Center(
      child: CupertinoSlider(
        value: _value,
        onChanged: (double value) {
          setState(() {
            print('$value');
            _value = value;
          });
        },
        min: 1.0,
        max: 10.0,
        divisions: 5,
        activeColor: Colors.red,
      ),
    );
  }

}