跟着技术胖学flutter
小技巧：在vscode上通过flutter run开启flutter应用。
press r means hot reload
To toggle the widget inspector (WidgetsApp.showWidgetInspectorOverride), press “i”.
To toggle the display of construction lines (debugPaintSizeEnabled), press “p”.
To simulate different operating systems, (defaultTargetPlatform), press “o”.
To toggle the elevation checker, press “z”.
To display the performance overlay (WidgetsApp.showPerformanceOverlay), press “P”.
To enable timeline events for all widget build methods, (debugProfileWidgetBuilds), press “a”
To save a screenshot to flutter.png, press “s”.
To repeat this help message, press “h”. To detach, press “d”; to quit, press “q”.
学习地址：