是否可以将CupertinoPicker
中项目的默认位置更改为两行之间的中心?默认位置似乎偏向上一行。
这是再现CupertinoPicker
的代码
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: CupertinoPicker(
itemExtent: 50,
onSelectedItemChanged: (int index) {
print(index);
},
children: <Widget>[
Text("Item 1"),
Text("Item 2"),
Text("Item 3"),
],
),
);
}
}
这看起来像:
感谢任何提示,提示和建议!
用Center
小部件包裹您的孩子小部件:
CupertinoPicker(
itemExtent: 50,
onSelectedItemChanged: (int index) {
print(index);
},
children: <Widget>[
Center(child: Text("Item 1")),
Center(child: Text("Item 2")),
Center(child: Text("Item 3")),
],
),