mvvm

netrain_flutter_app/lib/douwen/Demo2.dart

@@ -10,9 +10,21 @@ import 'package:netrain_flutter_app/douwen/custom/http/AdService.dart';
 import 'custom/http/base/IEntity.dart';
 
 class Demo2 extends BaseView {
+  Demo2() : super(BaseViewModel());
 
-  Demo2() : super(BaseViewModel()) {
-    builder = (context, value, child) => Container(
+
+  _item(String title, VoidCallback onPressed) {
+    return Container(
+      child: RaisedButton(
+        onPressed: onPressed,
+        child: Text(title),
+      ),
+    );
+  }
+
+  @override
+  Widget builder(BuildContext context, BaseViewModel value, Widget child) {
+    Container(
         child: Column(
           children: [
             Row(
@@ -31,9 +43,9 @@ class Demo2 extends BaseView {
             setReplaceView(Row(
               children: [
                 ValueListenableBuilder(
-                    valueListenable: viewModel.num,
+                    valueListenable: viewModel.showText,
                     builder: (context, value, child) =>
-                        Text("点击了${viewModel.num.value}次")),
+                        Text(value.toString())),
                 ElevatedButton(
                     onPressed: () async {
                       viewModel.login();
@@ -45,13 +57,4 @@ class Demo2 extends BaseView {
         )
     );
   }
-
-  _item(String title, VoidCallback onPressed) {
-    return Container(
-      child: RaisedButton(
-        onPressed: onPressed,
-        child: Text(title),
-      ),
-    );
-  }
 }

netrain_flutter_app/lib/douwen/custom/BaseView.dart

@@ -6,10 +6,8 @@ import 'EmptyPage.dart';
 import 'ErrorPage.dart';
 import 'ViewState.dart';
 
-class BaseView extends StatefulWidget {
+abstract class BaseView extends StatefulWidget {
   BaseViewModel viewModel;
-  Widget Function(BuildContext context, BaseViewModel value, Widget child)
-      builder;
   Widget _mReplaceView;
   Widget emptyView = EmptyPage();
   Widget errorView = ErrorPage();
@@ -18,6 +16,8 @@ class BaseView extends StatefulWidget {
   }
 
 
+  Widget builder(BuildContext context, BaseViewModel value, Widget child);
+
   Widget setReplaceView(Widget replaceView) {
     _mReplaceView = replaceView;
     switch (viewModel.viewState ?? ViewState.Normal) {

netrain_flutter_app/lib/douwen/custom/BaseViewModel.dart

@@ -7,6 +7,7 @@ import 'ViewState.dart';
 class BaseViewModel extends ChangeNotifier {
   var _viewState;
   var num = ValueNotifier<int>(0);
+  var showText = ValueNotifier<String>("稍等");
 
   set viewState(ViewState viewState) => setViewState(viewState);
 
@@ -45,7 +46,17 @@ class BaseViewModel extends ChangeNotifier {
     AdRepository.instance.login((str) {
       Fluttertoast.showToast(msg: str);
     }, (iEntity) {
+      showText.post(iEntity.msg);
       Fluttertoast.showToast(msg: iEntity.msg);
     });
   }
+
+
 }
+
+extension ValueNotifierValue<T> on ValueNotifier<T>{
+  void post(T t){
+    value = t;
+    notifyListeners();
+  }
+}
\ No newline at end of file

netrain_flutter_app/lib/douwen/custom/http/AdRepository.dart

@@ -3,7 +3,7 @@ import 'package:netrain_flutter_app/douwen/custom/http/AdService.dart';
 import 'base/IEntity.dart';
 import 'base/IRepository.dart';
 
-class AdRepository with IRepository{
+class AdRepository with IRepository {
   AdRepository._privateConstructor(this._service);
 
   static AdRepository _instance;
@@ -17,6 +17,9 @@ class AdRepository with IRepository{
 
   final AdService _service;
 
-  void login(void onSuccess(String str),void onError(IEntity iEntity)) => getResult<String>(_service.login(),analysis: (data) => data.toString(),onSuccess: (str) => onSuccess(str),onError:(iEntity) => onError(iEntity));
+  void login(void onSuccess(String str), void onError(IEntity iEntity)) =>
+      getResult<String>(_service.login(),
+          analysis: (data) => data.toString(),
+          onSuccess: (str) => onSuccess(str),
+          onError: (iEntity) => onError(iEntity));
 }
-