Flutter 抽屉未定义
当我在正文中添加gridview.count时,我得到一个错误,说抽屉没有定义,现在它给出了这个错误,哪个抽屉没有定义。。。如何修复此错误 这是我的脚手架:Flutter 抽屉未定义,flutter,visual-studio-code,flutter-layout,Flutter,Visual Studio Code,Flutter Layout,当我在正文中添加gridview.count时,我得到一个错误,说抽屉没有定义,现在它给出了这个错误,哪个抽屉没有定义。。。如何修复此错误 这是我的脚手架: return new Scaffold( appBar: new AppBar( title: Stack( children: <Widget>[Text('PickerUp')], ), centerTitle: true, ), body: new GridView.coun
return new Scaffold(
appBar: new AppBar(
title: Stack(
children: <Widget>[Text('PickerUp')],
),
centerTitle: true,
),
body: new GridView.count(
crossAxisCount: 2,
children: List.generate(100, (index) {
return Center(
child: Text('Item $index',
style: Theme.of(context).textTheme.headline));
}),
// Drawer controls left menu drawer
drawer: Container(
width: 245,
child: new Drawer(
child: ListView(
padding: EdgeInsets.zero,
children: <Widget>[
UserAccountsDrawerHeader(
accountName: Text('Admin'),
accountEmail: Text('test@admin.com'),
currentAccountPicture: CircleAvatar(
backgroundImage: NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2E4OWMzZTM4LWI2ZjMtNDhhMC05ZjllLWRmOWEwMTI5ZmI5M1wvZGFnaGg1eC00YTc3YjNlYy1mZDRmLTRkMTctOWY4NC01OTYzYThjYjVjMDMucG5nIn1dXSwiYXVkIjpbInVybjpzZXJ2aWNlOmZpbGUuZG93bmxvYWQiXX0.dWTFMrwnbAbj5TtUp9U_vQsohW7MnkRPymzR5wZQoV8')),
),
ListTile(
leading: Icon(Icons.search),
title: Text('Search'),
),
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings'),
),
ListTile(
leading: Icon(Icons.arrow_back),
title: Text('Logout'),
),
],
),
),
),
),
);
返回新脚手架(
appBar:新的appBar(
标题:堆栈(
子项:[Text('PickerUp')],
),
标题:对,
),
正文:新建GridView.count(
交叉轴计数:2,
子项:List.generate(100,(索引){
返回中心(
子项:文本('Item$index',
风格:Theme.of(context.textTheme.headline));
}),
//抽屉控制左菜单抽屉
抽屉:集装箱(
宽度:245,
孩子:新抽屉(
子:ListView(
填充:EdgeInsets.zero,
儿童:[
UserAccountsDrawerHeader(
accountName:Text('Admin'),
accountEmail:Text('test@admin.com'),
currentAccountPicture:CircleAvatar(
背景图片:NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2 OWMZZTM4LWI2ZJMTNDHHMC05ZJLLLWRMOWEWMTI5ZMI5WVZGFNAGG1EC00YTC3YJNLY1MZDRMLTRKMTCTOY4NC01OTYZJJJJJJVJMDUCG5NIN1DXSWIYXVKIJPBINVYBJPZZXJ2LOMZPBGUZG93BMXYWQIXX0.DWTFMrWNWBABJ5TTUP9U(VQSOHW7MKYMZR5WQOV8'),
),
列表砖(
前导:图标(Icons.search),
标题:文本(“搜索”),
),
列表砖(
前导:图标(图标.设置),
标题:文本(“设置”),
),
列表砖(
前导:图标(图标。箭头向后),
标题:文本(“注销”),
),
],
),
),
),
),
);
括号放错了位置
body: new GridView.count(
crossAxisCount: 2,
children: List.generate(100, (index) {
return Center(
child: Text('Item $index',
style: Theme.of(context).textTheme.headline));
})), <- missed bracket
body:new GridView.count(
交叉轴计数:2,
子项:List.generate(100,(索引){
返回中心(
子项:文本('Item$index',
风格:Theme.of(context.textTheme.headline));
})),括号放错了位置
body: new GridView.count(
crossAxisCount: 2,
children: List.generate(100, (index) {
return Center(
child: Text('Item $index',
style: Theme.of(context).textTheme.headline));
})), <- missed bracket
body:new GridView.count(
交叉轴计数:2,
子项:List.generate(100,(索引){
返回中心(
子项:文本('Item$index',
风格:Theme.of(context.textTheme.headline));
})),您必须确保使用括号括起来。这是你的脚手架
return new Scaffold(
appBar: new AppBar(
title: Stack(
children: <Widget>[Text('PickerUp')],
),
centerTitle: true,
),
// Drawer controls left menu drawer
drawer: Container(
width: 245,
child: new Drawer(
child: ListView(
padding: EdgeInsets.zero,
children: <Widget>[
UserAccountsDrawerHeader(
accountName: Text('Admin'),
accountEmail: Text('test@admin.com'),
currentAccountPicture: CircleAvatar(
backgroundImage: NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2E4OWMzZTM4LWI2ZjMtNDhhMC05ZjllLWRmOWEwMTI5ZmI5M1wvZGFnaGg1eC00YTc3YjNlYy1mZDRmLTRkMTctOWY4NC01OTYzYThjYjVjMDMucG5nIn1dXSwiYXVkIjpbInVybjpzZXJ2aWNlOmZpbGUuZG93bmxvYWQiXX0.dWTFMrwnbAbj5TtUp9U_vQsohW7MnkRPymzR5wZQoV8')),
),
ListTile(
leading: Icon(Icons.search),
title: Text('Search'),
),
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings'),
),
ListTile(
leading: Icon(Icons.arrow_back),
title: Text('Logout'),
),
],
),
)),
body: new GridView.count(
crossAxisCount: 2,
children: List.generate(100, (index) {
return Center(
child: Text('Item $index',
style: Theme.of(context).textTheme.headline));
}),
),
);
返回新脚手架(
appBar:新的appBar(
标题:堆栈(
子项:[Text('PickerUp')],
),
标题:对,
),
//抽屉控制左菜单抽屉
抽屉:集装箱(
宽度:245,
孩子:新抽屉(
子:ListView(
填充:EdgeInsets.zero,
儿童:[
UserAccountsDrawerHeader(
accountName:Text('Admin'),
accountEmail:Text('test@admin.com'),
currentAccountPicture:CircleAvatar(
背景图片:NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2 OWMZZTM4LWI2ZJMTNDHHMC05ZJLLLWRMOWEWMTI5ZMI5WVZGFNAGG1EC00YTC3YJNLY1MZDRMLTRKMTCTOY4NC01OTYZJJJJJJVJMDUCG5NIN1DXSWIYXVKIJPBINVYBJPZZXJ2LOMZPBGUZG93BMXYWQIXX0.DWTFMrWNWBABJ5TTUP9U(VQSOHW7MKYMZR5WQOV8'),
),
列表砖(
前导:图标(Icons.search),
标题:文本(“搜索”),
),
列表砖(
前导:图标(图标.设置),
标题:文本(“设置”),
),
列表砖(
前导:图标(图标。箭头向后),
标题:文本(“注销”),
),
],
),
)),
正文:新建GridView.count(
交叉轴计数:2,
子项:List.generate(100,(索引){
返回中心(
子项:文本('Item$index',
风格:Theme.of(context.textTheme.headline));
}),
),
);
您必须确保使用括号。这是你的脚手架
return new Scaffold(
appBar: new AppBar(
title: Stack(
children: <Widget>[Text('PickerUp')],
),
centerTitle: true,
),
// Drawer controls left menu drawer
drawer: Container(
width: 245,
child: new Drawer(
child: ListView(
padding: EdgeInsets.zero,
children: <Widget>[
UserAccountsDrawerHeader(
accountName: Text('Admin'),
accountEmail: Text('test@admin.com'),
currentAccountPicture: CircleAvatar(
backgroundImage: NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2E4OWMzZTM4LWI2ZjMtNDhhMC05ZjllLWRmOWEwMTI5ZmI5M1wvZGFnaGg1eC00YTc3YjNlYy1mZDRmLTRkMTctOWY4NC01OTYzYThjYjVjMDMucG5nIn1dXSwiYXVkIjpbInVybjpzZXJ2aWNlOmZpbGUuZG93bmxvYWQiXX0.dWTFMrwnbAbj5TtUp9U_vQsohW7MnkRPymzR5wZQoV8')),
),
ListTile(
leading: Icon(Icons.search),
title: Text('Search'),
),
ListTile(
leading: Icon(Icons.settings),
title: Text('Settings'),
),
ListTile(
leading: Icon(Icons.arrow_back),
title: Text('Logout'),
),
],
),
)),
body: new GridView.count(
crossAxisCount: 2,
children: List.generate(100, (index) {
return Center(
child: Text('Item $index',
style: Theme.of(context).textTheme.headline));
}),
),
);
返回新脚手架(
appBar:新的appBar(
标题:堆栈(
子项:[Text('PickerUp')],
),
标题:对,
),
//抽屉控制左菜单抽屉
抽屉:集装箱(
宽度:245,
孩子:新抽屉(
子:ListView(
填充:EdgeInsets.zero,
儿童:[
UserAccountsDrawerHeader(
accountName:Text('Admin'),
accountEmail:Text('test@admin.com'),
currentAccountPicture:CircleAvatar(
背景图片:NetworkImage(
'https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/f/a89c3e38-b6f3-48a0-9f9e-df9a0129fb93/daghh5x-4a77b3ec-fd4f-4d17-9f84-5963a8cb5c03.png?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1cm46YXBwOjdlMGQxODg5ODIyNjQzNzNhNWYwZDQxNWVhMGQyNmUwIiwiaXNzIjoidXJuOmFwcDo3ZTBkMTg4OTgyMjY0MzczYTVmMGQ0MTVlYTBkMjZlMCIsIm9iaiI6W1t7InBhdGgiOiJcL2ZcL2 OWMZZTM4LWI2ZJMTNDHHMC05ZJLLLWRMOWEWMTI5ZMI5WVZGFNAGG1EC00YTC3YJNLY1MZDRMLTRKMTCTOY4NC01OTYZJJJJJJVJMDUCG5NIN1DXSWIYXVKIJPBINVYBJPZZXJ2LOMZPBGUZG93BMXYWQIXX0.DWTFMrWNWBABJ5TTUP9U(VQSOHW7MKYMZR5WQOV8'),
),
列表砖(
前导:图标(Icons.search),
标题:文本(“搜索”),
),
列表砖(
前导:图标(图标.设置),
标题:文本(“设置”),
),
列表砖(
前导:图标(图标。箭头向后),
标题:文本(“注销”),