本节通过学习老孟《Flutter实战入门》。该风格组件需要引用import ‘package:flutter/cupertino.dart’;包。
一、CupertinoActivityIndicator
CupertinoActivityIndicator是ios风格的“加载动画”，动画如图：

代码：

void main() {
  runApp(MyCupertinoApp());
}

class MyCupertinoApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
       home: new CupertinoActivityIndicator(radius: 30,),//radus属性表示半径
    );
    throw UnimplementedError();
  }

}

二、CupertinoAlerDialog
CupertinoAlerDialog 是IOS风格的警告框控件，常用属性如下：

注意：CupertinoAlerDialog 本身不带弹出效果，实现点击按钮弹出CupertinoAlerDialog效果：
代码来源https://blog.csdn.net/peng2hui1314/article/details/107121130

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

String _storageDir = '';
void main() {
  runApp(MyCupertinoApp());
}

class MyCupertinoApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: DialogPage(),
    );
  }
}

class DialogPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Demo'),
      ),
      body: Center(
        child: RaisedButton(
          onPressed: () {
            _showDialog(context);
          },
          child: Text('点击显示弹窗'),
        ),
      ),
    );
  }
}

void _showDialog(widgetContext) {
  showCupertinoDialog(
    context: widgetContext,
    builder: (context) {
      return CupertinoAlertDialog(
        title: Text('确认删除'),
        actions: [
          CupertinoDialogAction(
            child: Text('确认'),
            onPressed: () {
              Navigator.of(context).pop();
            },
          ),
          CupertinoDialogAction(
            child: Text('取消'),
            isDestructiveAction: true,
            onPressed: () {
              Navigator.of(context).pop();
            },
          ),
        ],
      );
    },
  );
}

三、CupertinoButton
CupertinoButton 是IOS风格的按钮组件，点击没有水波纹效果，属性如下：

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

String _storageDir = '';
void main() {
  runApp(MyCupertinoApp());
}

class MyCupertinoApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyCupertinoTest(),
    );
  }
}

class MyCupertinoTest extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("button"),),
      body: Center(
        child: CupertinoButton(
          child: Text('CupertinoButton'),
          onPressed: (){},
          color: Colors.yellow,
        ),
      ),
    );
    throw UnimplementedError();
  }

}

四、CupertinoSlider
CupertinoSlider是滑动按钮，属性如下：

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

String _storageDir = '';
void main() {
  runApp(MyCupertinoApp());
}

class MyCupertinoApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: CupertinoSliderDemo(),
    );
  }
}

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

class _CupertinoSliderDemo extends State<CupertinoSliderDemo> {
  double _value = 3.0;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: CupertinoSlider(
          value: _value,
          onChanged: (double v) {
            setState(() {
              print('$v');
              _value = v;
            });
          },
          min: 1.0,
          max: 10.0,
          divisions: 5,
          activeColor: Colors.green,
        ),
      )
    );

    throw UnimplementedError();
  }

}

五、CupertionSwitch
CupertionSwitch 是一个开关控制，主要属性：

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

String _storageDir = '';
void main() {
  runApp(MyCupertinoApp());
}

class MyCupertinoApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: CupertinoSwitchDemo(),
    );
  }
}

class CupertinoSwitchDemo extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return  _CupertinoSwitchDemo();
  }
}

class _CupertinoSwitchDemo extends State<CupertinoSwitchDemo> {
  bool _value = true;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Center(
          child: CupertinoSwitch(
            value: _value,
            onChanged: (bool v) {
              setState(() {
                _value = v;
              });
            },
            activeColor: Colors.green,
          ),
        )
    );

    throw UnimplementedError();
  }

}