angular.module("app").run(["$rootScope", "$ionicPlatform", "$location", "$ionicHistory", function ($rootScope, $ionicPlatform, $location, $ionicHistory) {  "use strict";    // 當用戶在主頁面， 按返回鍵時，給予提示，如果在2s內再次出發返回鍵，就退出app  function showTipMsg() {   window.plugins.toast.showShortCenter("在按一次退出app"); // toast是cordova的一個插件cordova-plugin-x-toast，也可以用ionic的彈窗來代替   $rootScope.exitApp = true;   const delay = 2000;   setTimeout(() => {    $rootScope.exitApp = false;   }, delay);  }    // 判斷當前路由，是否是project， mission，mine， message這幾個主頁面  function isExitPage() {   let path = $location.path(),    state = _.last(path.split("/")),    ary = ["project", "mission", "mine", "", "message"];   return _.includes(ary, state);  }    // 注冊返回事件  function registerBackButton(event) {   event.preventDefault();   $cordovaKeyboard.isVisible() && $cordovaKeyboard.close();   if (isExitPage()) {    $rootScope.exitApp && ionic.Platform.exitApp();    !$rootScope.exitApp && showTipMsg();   } else {    $ionicHistory.goBack();   }   return false;  }    // ionic 環境已經準備完畢  ionic.Platform.ready(() => {   try {    const priority = 101;    $ionicPlatform.is("Android") && $ionicPlatform.registerBackButtonAction(registerBackButton, priority);   } catch (e) {    console.warn("Application is running in browser causes inspection failed.");   }  }); }]);