Flutter ListView 自适应高度

Container(
  width: 300,
  constraints: BoxConstraints(
    minHeight: 100,
    maxHeight: 300
  ),
  color: Colors.grey,
  child: ListView(
    shrinkWrap: true, // 关键
    children: <Widget>[
      for(int i = 0; i < 30; i++) Text('hello world!', style: TextStyle(fontSize: 20),)
    ],
  ),
),