Flutter基础widgets教程-WidgetsApp篇

1 WidgetsApp

未经过改装的MaterialApp 可以说MaterialApp基于WidgetsApp

2 构造函数

MaterialApp({
  Key key,
  this.title = '', 
  this.home,
  this.color, 
  this.textStyle
  this.theme, 
  this.routes = const <String, WidgetBuilder>{}, 
  this.navigatorKey, 
  this.initialRoute, 
  this.onGenerateRoute, 
  this.onUnknownRoute, 
  this.navigatorObservers = const <NavigatorObserver>[], 
  this.builder, 
  this.onGenerateTitle, 
  this.locale, 
  this.localizationsDelegates, 
  this.localeListResolutionCallback, 
  this.localeResolutionCallback, 
  this.supportedLocales = const <Locale>Locale('en', 'US'), 
  this.debugShowMaterialGrid = false, 
  this.showPerformanceOverlay = false, 
  this.checkerboardRasterCacheImages = false, 
  this.checkerboardOffscreenLayers = false, 
  this.showSemanticsDebugger = false,
  this.debugShowCheckedModeBanner = true, 
  this.debugShowWidgetInspector
})

3 常用属性

3.1 title：安卓手机任务管理页面所看到应用的名字

title:Text("Flutter Demo"),

3.2 home：app运行时打开的首页面

home: MyApp(),

3.3 routes：定义路由

内容为map健值对；key为路由名称，value为路由对应的页面。页面需要跳转时，可以通过Navigator.pushNamed(context, 'rooteName');来跳转,

3.4 theme：定义主题

theme: ThemeData(
    primaryColor: Colors.red,
),

3.5 debugShowWidgetInspector

当为true时，打开检查覆盖，该字段只能在检查模式下可用

3.6 inspectorSelectButtonBuilder

构建一个视图与视图切换的小部件，可以通过该小部件或按钮切换到检查模式（debugShowWidgetInspector==true时才有效，点击该按钮之后再点击你要检查的视图）

3.7 debugShowMaterialGrid

该字段开启后，会在WidgetsApp外层包裹GridPaper，这个部件主要显示网格

3.8 initialRoute

指定默认显示的路由名字，默认值为 Window.defaultRouteName

3.9 onGenerateRoute

路由回调函数