如果对MaterialApp不熟悉,可先看我上一篇文章:
Flutter之MaterialApp使用详解
与MaterialApp相比
字段 |
类型 |
navigatorKey(导航键) |
GlobalKey<NavigatorState> |
onGenerateRoute(生成路由) |
RouteFactory |
onUnknownRoute(未知路由) |
RouteFactory |
navigatorObservers(导航观察器) |
List<NavigatorObserver> |
initialRoute(初始路由) |
String |
builder(建造者) |
TransitionBuilder |
title(标题) |
String |
onGenerateTitle(生成标题) |
GenerateAppTitle |
color(颜色) |
Color |
locale(地点) |
Locale |
localizationsDelegates(本地化委托) |
Iterable<LocalizationsDelegate<dynamic>> |
localeResolutionCallback(区域分辨回调) |
LocaleResolutionCallback |
supportedLocales(支持区域) |
Iterable<Locale> |
showPerformanceOverlay(显示性能叠加) |
bool |
checkerboardRasterCacheImages(棋盘格光栅缓存图像) |
bool |
checkerboardOffscreenLayers(棋盘格层) |
bool |
showSemanticsDebugger(显示语义调试器) |
bool |
debugShowCheckedModeBanner(调试显示检查模式横幅) |
bool |
字段 |
类型 |
textStyle(文字样式) |
TextStyle |
debugShowWidgetInspector(调试小部件检测) |
bool |
inspectorSelectButtonBuilder(审查员选择按钮生成器) |
InspectorSelectButtonBuilder |
字段 |
类型 |
home(主页) |
Widget |
routes(路由) |
Map<String, WidgetBuilder> |
theme(主题) |
ThemeData |
debugShowMaterialGrid(调试显示材质网格) |
bool |
1. textStyle
使用
//该段代码源自flutter/material/app.dart
//因为MaterialApp都是使用Theme里面的主题色,并且一般部件使用的是MaterialApp部件,所以该textStyle为报错文字的颜色
const TextStyle _errorTextStyle= const TextStyle(
color: const Color(0xD0FF0000),
fontFamily: 'monospace',
fontSize: 48.0,
fontWeight: FontWeight.w900,
decoration: TextDecoration.underline,
decorationColor: const Color(0xFFFFFF00),
decorationStyle: TextDecorationStyle.double,
debugLabel: 'fallback style; consider putting your text in a Material',
);
new WidgetsApp(
color: Colors.grey,
textStyle: _myTextStyle ,
);
2. debugShowWidgetInspector
3. inspectorSelectButtonBuilder
new WidgetsApp(
debugShowWidgetInspector: true,
inspectorSelectButtonBuilder: (BuildContext context, VoidCallback onPressed) {
return new FloatingActionButton(
child: const Icon(Icons.search),
onPressed: onPressed,
mini: true,
);
},
);
4. home
Route<dynamic> _onGenerateRoute(RouteSettings settings) {
final String name = settings.name;
WidgetBuilder builder;
//判断当前home字段不为空,而且name为Navigator.defaultRouteName
//返回home字段的Widget
if (name == Navigator.defaultRouteName && widget.home != null) {
builder = (BuildContext context) => widget.home;
} else {
//这里查找路由对应的Widget,即为routes字段传入的map
builder = widget.routes[name];
}
if (builder != null) {
//可以看到默认是使用MaterialPageRoute的切换界面动画
return new MaterialPageRoute<dynamic>(
builder: builder,
settings: settings,
);
}
if (widget.onGenerateRoute != null)
return widget.onGenerateRoute(settings);
return null;
}
//下面这里有部分省略
new WidgetsApp(
onGenerateRoute: _haveNavigator ? _onGenerateRoute : null,
)
5. routes
6. theme
//如果为空使用默认光亮主题
final ThemeData theme = widget.theme ?? new ThemeData.fallback();
//factory ThemeData.fallback() => new ThemeData.light();
Widget result = new AnimatedTheme(
data: theme,
isMaterialAppTheme: true,
child: new WidgetsApp(
key: new GlobalObjectKey(this),
//..........
)
);
7. debugShowMaterialGrid
assert(() {
if (widget.debugShowMaterialGrid) {
result = new GridPaper(
color: const Color(0xE0F9BBE0),
interval: 8.0,
divisions: 2,
subdivisions: 1,
child: result,
);
}
return true;
}());