8.父Widget管理子Widget的状态class ParentWidget extends StatefulWidget {@override_ParentWidgetState createState() => new _ParentWidgetState();}class _ParentWidgetState extends State<ParentWidget> {//

29.旋转import 'dart:math' as math;DecoratedBox(decoration:BoxDecoration(color: Colors.red),child: Transform.rotate(//顺时针旋转90度angle: math.pi/2,child: Text("Hello world"),),)效果：30.缩放

35.监听滚动事件class ScrollControllerTestRoute extends StatefulWidget {@overrideScrollControllerTestRouteState createState() {return new ScrollControllerTestRouteState();}}class ScrollControllerTestRouteSta

17.表单class FormTestRoute extends StatefulWidget {@override_FormTestRouteState createState() => new _FormTestRouteState();}class _FormTestRouteState extends State<FormTestRoute> {//文本框的控制器，通过它

21.流式布局Wrap(spacing: 8.0, // 主轴(水平)方向间距runSpacing: 4.0, // 纵轴（垂直）方向间距alignment: WrapAlignment.center, //沿主轴方向居中children: <Widget>[new Chip(//avatar: new CircleAvatar(backgroundColor: Colo

3.页面的切换跳转class RouterTestRoute extends StatelessWidget {@overrideWidget build(BuildContext context) {return Center(child: RaisedButton(onPressed: () async {// 异步执行转为同步执行，必须等待结果返回后才往下执行var result = awa

39.跨组件状态共享导入插件：provider: ^4.0.4导入包 ：import 'package:provider/provider.dart';核心代码 ：class MyHomePage2 extends StatelessWidget {@overrideWidget build(BuildContext context) {//订阅者，订阅ProviderDemoNotifier，在

1.下载vscode(自行下载)2.在vscode的应用商店中安装flutter插件和dart插件(在应用商店搜索框搜索即可)3.下载android studio4.下载flutter sdk下载地址: https://flutter.dev/docs/development/tools/sdk/releases ，拼接到用户变量Path的后面(记得加分号;)就可以使用flutter命令了，比如我