iOS crypto target

lib/screens/settings.dart

@@ -1,10 +1,14 @@
+import 'dart:async';
+
 import 'package:checker/base/base_screen.dart';
 import 'package:checker/base/base_state.dart';
 import 'package:checker/common.dart';
 import 'package:checker/consts.dart';
 import 'package:checker/db.dart';
+import 'package:checker/network.dart';
 import 'package:checker/screens/currencies.dart';
 import 'package:checker/screens/languages.dart';
+import 'package:checker/screens/splash.dart';
 import 'package:checker/strings.dart';
 import 'package:flutter/material.dart';
 
@@ -42,12 +46,18 @@ class SettingsState extends BaseState<SettingsScreen> {
     this.returnToScanner = returnToScanner;
   }
 
+  @override
+  void initState() {
+    print('init state!');
+    super.initState();
+  }
+
   @override Widget build(BuildContext ctx) {
     helper.getSettings(true).then((info) {
       setState(() {
-        print('currency: ${info['currency']}');
-        print('locale: ${info['locale']}');
-        print('token: ${info['token']}');
+//        print('currency: ${info['currency']}');
+//        print('locale: ${info['locale']}');
+//        print('token: ${info['token']}');
         menuItems[0].title = StringsLocalization.currency();
         menuItems[1].title = StringsLocalization.locale();
         menuItems[2].title = StringsLocalization.logout();
@@ -152,6 +162,55 @@ class SettingsState extends BaseState<SettingsScreen> {
     }
   }
 
+  // В методе отправляется запрос на удаление токена кассы, очищаются SharedPreferences приложения.
+  logout(BuildContext context, SqliteHelper helper) async {
+    String token = await helper.getToken();
+    VoidCallback positiveCallback = () {
+      if (token != null) {
+        getDeleteTokenRequest(token).then((response) {
+          helper.clear().then((result) {
+            while (Navigator.of(context).canPop()) {
+              Navigator.of(context).pop();
+            }
+            var route = new MaterialPageRoute<Null>(builder: (BuildContext context) => new SplashScreen(helper, app));
+            new Future.delayed(const Duration(milliseconds: 200), () {
+              Navigator.of(context).pushReplacement(route);
+            });
+          });
+        }).catchError((error) {
+          print(error.toString());
+        });
+      } else {
+        while (Navigator.of(context).canPop()) {
+          Navigator.of(context).pop();
+        }
+      }
+    };
+
+    showYesNoDialog(context, StringsLocalization.confirmation(),
+      StringsLocalization.askChangeStore(), positiveCallback);
+  }
+
+// Запуск диалога с двумя кнопками
+  showYesNoDialog(BuildContext context, String title, String content,
+    VoidCallback positiveCallback) {
+    showDialog(
+      context: context,
+      child: new AlertDialog(
+        title: new Text(title),
+        content: new Text(content),
+        actions: <Widget>[
+          new FlatButton(
+            child: new Text(StringsLocalization.no()),
+            onPressed: () {
+              Navigator.of(context).pop();
+            }),
+          new FlatButton(
+            child: new Text(StringsLocalization.yes()),
+            onPressed: positiveCallback)
+        ]));
+  }
+
   Widget getArrow() {
     return new Container(margin: new EdgeInsets.only(left: 8.0),
       child: new Image.asset(settings_arrow_png, height: 42.0));
@@ -161,12 +220,4 @@ class SettingsState extends BaseState<SettingsScreen> {
   String getTitle() {
     return StringsLocalization.settings();
   }
-
-//  onWillPop() {
-//    if (returnToScanner) {
-//      return startScanner(context, app, helper);
-//    } else {
-//      return true;
-//    }
-//  }
 }