Question

这是我的代码。

$scope.logout=function(){
    localstorage.set('user_id', "");
    localstorage.set('access-token', "");
    localstorage.set('isUserTraverseColony', 0);
    localstorage.set('isStarted', 0);
    $window.localStorage.clear();
    $window.localStorage.removeItem(access-token);
    $ionicHistory.clearCache();
    $ionicHistory.clearHistory();
 };

我想从我的localStorage中删除访问令牌变量，当我使用它时它适用于浏览器

 $window.localStorage.clear();
 $window.localStorage.removeItem(access-token);

但它不能用于我的应用程序。

这是我的本地存储工厂

angular.module('starter.controllers').factory('localstorage', ['$window', '$localStorage','$q', function ($window, $localStorage,$q) {
    return {
        set: function (key, value) {
             var deferred = $q.defer();
            $window.localStorage[key] = value;
                 deferred.resolve(1);
                 return deferred.promise;
        },
        get: function (key, defaultValue) {
            return $window.localStorage[key] || defaultValue;
        },
        setObject: function (key, value) {
            $window.localStorage[key] = JSON.stringify(value);
        },
        getObject: function (key) {
            return JSON.parse($window.localStorage[key] || '{}');
        }
    }

}]);

任何想法？

Answer 1

我平均也遇到过同样的问题。我正在使用一些全局变量进行本地存储。你的代码似乎没问题。但你可以更好地优化它

$scope.logout = function(){
  $window.localStorage.clear();
    $ionicHistory.clearCache();
    $ionicHistory.clearHistory();
 };

您不需要设置

localstorage.set('user_id', "");
localstorage.set('access-token', "");
localstorage.set('isUserTraverseColony', 0);
localstorage.set('isStarted', 0);

因为你正在清除它们。

Answer 2

您可以将clear()方法添加到自定义localstorage服务中：

angular.module('starter.controllers').factory('localstorage', ['$window', '$localStorage','$q', function ($window, $localStorage,$q) {
    return {
        set: function (key, value) {
            $window.localStorage.setItem(key, value);
        },
        get: function (key, defaultValue) {
            return $window.localStorage.getItem(key) || defaultValue;
        },
        setObject: function (key, value) {
            $window.localStorage.setItem(key, JSON.stringify(value));
        },
        getObject: function (key) {
            return JSON.parse($window.localStorage.getItem(key) || '{}');
        },
        clear: function () {
            $window.localStorage.clear();
        }
    }

}]);

注意：我更新了您的服务删除承诺，因为HTML5 localStorage is syncronous并使用标准的get和set方法

然后在你的控制器中：

$scope.logout = function(){
    localstorage.clear();
    $ionicHistory.clearCache();
    $ionicHistory.clearHistory();
 };

如何清除离子中的本地存储数据？

2 个答案: