Ionic 实现双击返回键退出功能

  app.js 代码如下：

 
var myApp = angular.module('myApp',['ionic','ngCordova']);


myApp.controller('MyController', function($scope) {
   var count=0;
   $scope.lstorage="abcdd";
   $scope.sayHello = function() {
   	 console.log("------MyController.sayHello()");
     alert("hello!");
   }
});

myApp.run(function ($ionicPlatform, $rootScope, $location, $timeout, $ionicHistory, $cordovaToast) {
        $ionicPlatform.ready(function ($rootScope) {
            // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
            // for form inputs)
            if (window.cordova && window.cordova.plugins.Keyboard) {
                cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
            }
            if (window.StatusBar) {
                // org.apache.cordova.statusbar required
                StatusBar.styleDefault();
            }
            console.log("-----------------------1");
        });
        //双击退出
        $ionicPlatform.registerBackButtonAction(function (e) {
            //判断处于哪个页面时双击退出
            if ($location.path() == '/index.html') {
                if ($rootScope.backButtonPressedOnceToExit) {
                    ionic.Platform.exitApp();
                } else {
                    $rootScope.backButtonPressedOnceToExit = true;
                    $cordovaToast.showShortTop('再按一次退出系统');
                    setTimeout(function () {
                        $rootScope.backButtonPressedOnceToExit = false;
                    }, 2000);
                }
                console.log("-----------------------2");
            }
            else if ($ionicHistory.backView()) {
            	console.log("-----------------------3");
                $ionicHistory.goBack();

            } else {
                $rootScope.backButtonPressedOnceToExit = true;
                $cordovaToast.showShortTop('再按一次退出系统');
                setTimeout(function () {
                    $rootScope.backButtonPressedOnceToExit = false;
                }, 2000);
                console.log("-----------------------4");
            }
            e.preventDefault();
            return false;
        }, 101);
    });

以上脚本用了

cordova plugin add https://github.com/EddyVerbruggen/Toast-PhoneGap-Plugin.git

插件，自行安装一下