我是新来的 flutter 。我想在按钮上方设置文本/标签。我在flutter中找不到任何简单的文本或标签小部件。
文本应该很大(图片)并且在屏幕右侧，我想保持按钮的位置。如何用Flutter实现这一目标？
谢谢您的帮助。
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Padding(
padding: const EdgeInsets.only(top: 375.0),
child: Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("1"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("2"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("3"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("+"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("4"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("5"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("6"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("-"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("7"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("8"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("9"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("*"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 80,
width: 290,
child: FloatingActionButton.extended(
elevation: 0.2,
onPressed: () {},
label: Text("="),
isExtended: true,
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("/"),
),
)
],
),
],
),
),
),
);
}
}
最佳答案
使用扩展:
Expanded(
child: Align(
alignment: Alignment.centerRight,
child: Text(
"My Text",
textAlign: TextAlign.right,
style: TextStyle(fontSize: 68),
),
),
),
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Column(
children: <Widget>[
SizedBox(height: 24,),
Expanded(
child: Align(
alignment: Alignment.centerRight,
child: Text(
"My Text",
textAlign: TextAlign.right,
style: TextStyle(fontSize: 68),
),
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("1"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("2"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("3"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("+"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("4"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("5"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("6"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("-"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("7"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("8"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("9"),
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("*"),
),
),
],
),
SizedBox(
height: 20,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(
height: 80,
width: 290,
child: FloatingActionButton.extended(
elevation: 0.2,
onPressed: () {},
label: Text("="),
isExtended: true,
),
),
SizedBox(
height: 100,
width: 90,
child: FloatingActionButton(
elevation: 0.2,
onPressed: () {},
child: Text("/"),
),
)
],
),
],
),
),
);
}
关于flutter - 如何将文字摆放整齐？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/64101295/