fontSize的默认值为14.0。因此,textScaleFactor:2.0似乎与我的代码示例中看到的fontSize:28.0相同:classMyAppextendsStatelessWidget{@overrideWidgetbuild(BuildContextcontext){returnnewMaterialApp(home:Scaffold(appBar:AppBar(title:Text('Title')),body:Row(children:[newText("Jane",textScaleFactor:2.0),newText("Doe",style:newText