连续的小部件没有均匀地间隔开
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【中文标题】连续的小部件没有均匀地间隔开【英文标题】：Widgets in a row not spacing themselves out evenly 【发布时间】：2021-03-31 09:34:08 【问题描述】：我正在尝试制作一个小部件来显示用户在社交媒体平台上发布的帖子，我想在帖子中包含某些元素，其中之一是他在创建帖子时可能附加的外部链接。 我希望这些链接由圆形按钮表示（我已经通过使用 ClipOval 设法实现），并且我希望这些椭圆形排列成一排，与中心均匀间隔。
到目前为止，我能够将它们隔开的唯一方法是添加一定宽度的 SizedBox(s)。但这对于不同的帖子效率不高，链接的数量可能不同，因此椭圆的数量也可能不同。这看起来会很乱。
我使用堆栈覆盖了帖子图像顶部的行（我已对其应用线性渐变以使按钮可见）。
这是我的代码
class postTemplate extends StatelessWidget
List <String> tags = ['tag1','tag2','tag3','tag4','tag5','tag6','tag7','tag8'];
@override
Widget build(BuildContext context)
return Scaffold(
body: Column(
children: [
SizedBox(height: 150,),
Container(
height: 450,
child: Stack(
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
SizedBox(height: 20,),
Card(
elevation: 8.0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(32)
),
color: Colors.white,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
ListTile(
title: Padding(
padding: const EdgeInsets.only(left : 70.0),
child: Text("Username"),
),
subtitle: Padding(
padding: const EdgeInsets.only(top: 10.0,left: 80.0),
child: Text("Hello"),
),
),
Stack(
children: [
Container(
child: Container(
foregroundDecoration:BoxDecoration(
gradient: LinearGradient(
colors: [Colors.white, Colors.transparent],
begin: Alignment.bottomCenter,
end: Alignment.topCenter,
stops: [0, 0.3],
),),
child: Image(image: AssetImage('assets/images/modelPostImage.png'),fit: BoxFit.contain,)),
),
Positioned(
bottom: 10.0,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SizedBox(width: 15,),
Container(
width: 56,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
SizedBox(width: 15,),
Container(
width: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
SizedBox(width: 15,),
Container(
width: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
],
),
),
],
),
Container(
height: 44,
width: 350,
decoration: BoxDecoration(
borderRadius: BorderRadius.all(Radius.circular(22))
),
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: tags.length,
itemBuilder: (BuildContext context, int index)
return Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(22),
border: Border.all(color: Colors.black)
),
margin: EdgeInsets.only(right: 13, left: 13),
child: Padding(
padding: const EdgeInsets.only(
top: 10.0, bottom: 5.0, right: 20, left:20
),
child: Text(tags[index],
style: TextStyle(
color: Colors.black
),),
),
);
,
),
),
],
),
)
],
),
CircleAvatar(
radius: 42,
backgroundImage: AssetImage('assets/Icons/profileLogo.jpg')
)
],
),
),
],
),
);
任何帮助将不胜感激。
【问题讨论】：
【参考方案1】：用一个容器包裹起来，给它全宽并去掉尺寸
Positioned(
bottom: 10.0,
child: Container(
width:MediaQuery.of(context).size.width,
child :Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
width: 56,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
Container(
width: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
Container(
width: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
boxShadow: [
BoxShadow(
color: Colors.black,
blurRadius: 2.0,
spreadRadius: 1.0,
)
]
),
child: ClipOval(
child: Material(// button color
child: InkWell(
splashColor: Colors.red, // inkwell color
child: SizedBox(width: 56, height: 56, child:Image(
image: new AssetImage("assets/Icons/browser.jpg"),
width: 32,
height:32,
color: null,
fit: BoxFit.scaleDown,
),),
onTap: () ,
),
),
),
),
],
),
),
),
],
),
【讨论】：
如果我希望我的小部件占据整个屏幕的宽度，但这有助于我解决这个问题。我必须向我的***容器添加一个宽度参数，并为您指定的容器提供相同的宽度。它涉及对值进行硬编码，但可以完成。仅当有办法根据父级自动调整大小时。【参考方案2】：有一个专门的小部件可以创建均匀的空间，而不是使用 SizedBox。将 SizedBox 替换为 Spacer。
【讨论】：
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