我不知道如何将appBar的自动后退按钮更改为不同的颜色。它在脚手架下，我试图研究它，但我无法理解它。
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
title: Image.asset(
'images/.jpg',
fit: BoxFit.fill,
),
centerTitle: true,
),
当前回答
AppBar(
automaticallyImplyLeading: false,
leading: Navigator.canPop(context)
? IconButton(
icon: Icon(
Icons.arrow_back,
color: Colors.black,
size: 47,
),
onPressed: () => Navigator.of(context).pop(),
)
: null,
);
其他回答
更改CupertinoPageScaffold的主色调
Theme(
data: Theme.of(context).copyWith(
cupertinoOverrideTheme: CupertinoThemeData(
scaffoldBackgroundColor: Colors.white70,
primaryColor: Styles.green21D877, // HERE COLOR OF LEADING
),
),
child: CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(
brightness: Brightness.light,
backgroundColor: Colors.white,
middle: Text('Cupertino App Bar'),
),
child: Container(
child: Center(
child: CupertinoActivityIndicator(),
),
),
),
)
你必须使用AppBar中的iconTheme属性，像这样:
appBar: AppBar(
iconTheme: IconThemeData(
color: Colors.black, //change your color here
),
title: Text("Sample"),
centerTitle: true,
),
或者你想自己操作后退按钮。
appBar: AppBar(
leading: IconButton(
icon: Icon(Icons.arrow_back, color: Colors.black),
onPressed: () => Navigator.of(context).pop(),
),
title: Text("Sample"),
centerTitle: true,
),
更好的是，只有当你想改变后退按钮的颜色时才可以这样做。
appBar: AppBar(
leading: BackButton(
color: Colors.black
),
title: Text("Sample"),
centerTitle: true,
),
appBar: AppBar(
iconTheme: IconThemeData(
color: Colors.white, //modify arrow color from here..
),
);
全局设置后退按钮颜色
MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter Demo',
theme: ThemeData(
appBarTheme: AppBarTheme(
backgroundColor: Colors.white,
iconTheme: IconThemeData(color: Colors.black), // set backbutton color here which will reflect in all screens.
),
),
home: LoginScreen(),
);
同时,
更改SliverAppBar
SliverAppBar(
iconTheme: IconThemeData(
color: Colors.white, //change your color here
),
在AppBar中，添加前导参数并分配BackButton小部件。然后将颜色参数添加到BackButton，如下所示:
AppBar(
leading: const BackButton(
color: Colors.black, // Change the color here
),
centerTitle: true,
)
