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Flutter 颤振-如何从底部导航栏移除衬垫?_Flutter_Dart_Flutter Layout - Fatal编程技术网

Flutter 颤振-如何从底部导航栏移除衬垫?

Flutter 颤振-如何从底部导航栏移除衬垫?,flutter,dart,flutter-layout,Flutter,Dart,Flutter Layout,我在颤振应用程序中使用BottomNavigationBar。我对外观有额外的要求,这是我得到的结果。除了顶部和底部填充物(图中的箭头)外,一切都很好 这是我的代码: BottomNavigationBar( selectedFontSize: 0, type: BottomNavigationBarType.fixed, currentIndex: currIndex, items: tabs.map((e) { return BottomNavi

我在颤振应用程序中使用BottomNavigationBar。我对外观有额外的要求,这是我得到的结果。除了顶部和底部填充物(图中的箭头)外,一切都很好

这是我的代码:

BottomNavigationBar(
    selectedFontSize: 0,
    type: BottomNavigationBarType.fixed,
    currentIndex: currIndex,
    items: tabs.map((e) {
      return BottomNavigationBarItem(
          title: SizedBox.shrink(),
          icon: _buildIcon(e),
      );
    }).toList(),
  )
  
  
Widget _buildIcon(Data data) {

return Container(
  width: double.infinity,
  height:kBottomNavigationBarHeight ,
  child: Material(
    color:  _getBackgroundColor(data.index),
    child: InkWell(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Icon(Icons.email_outlined),
         
          Text('111', style: TextStyle(fontSize: 12, color: Colors.white)),
        ],
      ),
      onTap: () {
        onTabSelected(data.index);
      },
    ),
  ),
);
}    
BottomNavigationBar(
selectedFontSize:0,
类型:BottomNavigationBarType.fixed,
currentIndex:currentIndex,
项目:制表符。地图((e){
返回底部导航BarItem(
标题:SizedBox.shrink(),
图标:_buildIcon(e),
);
}).toList(),
)
小部件构建图标(数据){
返回容器(
宽度:double.infinity,
高度:kBottomNavigationBarHeight,
儿童:材料(
颜色:_getBackgroundColor(数据索引),
孩子:InkWell(
子:列(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
图标(图标、电子邮件),
文本('111',样式:TextStyle(字体大小:12,颜色:Colors.white)),
],
),
onTap:(){
(数据索引);
},
),
),
);
}    

我怎样才能去掉上面和下面的衬垫?任何想法我都将不胜感激。

我使用您的零件代码制作了一个示例代码。

但是我不能像你一样复制你的代码共享问题。
你能分享Scaffold底部导航栏的一部分或其他与代码相关的内容吗。

导入“包装:颤振/材料.省道”;
void main()=>runApp(MyApp());
类MyApp扩展了无状态小部件{
//此小部件是应用程序的根。
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
int _计数器=0;
void _incrementCounter(){
设置状态(){
_计数器++;
});
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(widget.title),
),
正文:中(
子:列(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
正文(
“您已经按了这么多次按钮:”,
),
正文(
“$”计数器“,
样式:Theme.of(context).textTheme.display1,
),
],
),
),
底部导航栏:底部导航栏(
selectedFontSize:0,
类型:BottomNavigationBarType.fixed,
当前索引:0,
项目:[
新海底导航气压计(
图标:_buildIcon(),
标题:SizedBox.shrink(),
),
新海底导航气压计(
图标:_buildIcon(),
标题:SizedBox.shrink(),
),
新海底导航气压计(
图标:_buildIcon(),
标题:SizedBox.shrink(),
)
]));
}
小部件_buildIcon(){
返回容器(
宽度:double.infinity,
高度:kBottomNavigationBarHeight,
儿童:材料(
颜色:颜色。灰色,
孩子:InkWell(
子:列(
mainAxisAlignment:mainAxisAlignment.center,
儿童:[
图标(图标、电子邮件),
文本('111',样式:TextStyle(字体大小:12,颜色:Colors.white)),
],
),
onTap:(){},
),
),
);
}
}

谢谢。我尝试了不同的选择,但是。。。我想键是selectedFontSize:0,
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text(
                'You have pushed the button this many times:',
              ),
              Text(
                '$_counter',
                style: Theme.of(context).textTheme.display1,
              ),
            ],
          ),
        ),
        bottomNavigationBar: BottomNavigationBar(
            selectedFontSize: 0,
            type: BottomNavigationBarType.fixed,
            currentIndex: 0,
            items: [
              new BottomNavigationBarItem(
                icon: _buildIcon(),
                title: SizedBox.shrink(),
              ),
              new BottomNavigationBarItem(
                icon: _buildIcon(),
                title: SizedBox.shrink(),
              ),
              new BottomNavigationBarItem(
                icon: _buildIcon(),
                title: SizedBox.shrink(),
              )
            ]));
  }

  Widget _buildIcon() {
    return Container(
      width: double.infinity,
      height: kBottomNavigationBarHeight,
      child: Material(
        color: Colors.grey,
        child: InkWell(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Icon(Icons.email_outlined),
              Text('111', style: TextStyle(fontSize: 12, color: Colors.white)),
            ],
          ),
          onTap: () {},
        ),
      ),
    );
  }
}