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我一直在尝试在支持 localStorage 的 angularJS 中重写购物车脚本，以便它们的数组能够在刷新或切换到另一个页面时存活下来。但是我似乎无法弄清楚我做错了什么。

<script>
angular.module('appname', ['ngStorage'])
    .controller('CartController', ['$scope', function CartController($scope, $localStorage, $sessionStorage) {

    if ($localStorage.items === undefined) {
        $localStorage.items = [];
    }

    $scope.addToCart = function(index, title, desc, price) {
        var found = false;
        angular.forEach($localStorage.items, function(items) {
            if (items.id  === index) {
                items.quantity++;
                found = true;
            }
        });
        if (!found) {
            $localStorage.items.push(angular.extend({id: index, title: title, quantity: 1, price: price}, index));
        }
    };

    $scope.remove = function(index) {
        $localStorage.items.splice(index, 1);
    };
}])
</script>

当我将所有 $localStorage.items 替换为 $scope.items 时，网站工作正常，但没有 localStorage 支持。我究竟做错了什么？

错误：

TypeError：无法在 u (angular.js:8927) 的 T.instance (angular.js:9855) 的 Object.invoke (angular.js:4604) 的新 CartController (page.php:604) 处读取未定义的属性“项目” ) 在 g (angular.js:8226) 在 g (angular.js:8229) 在 angular.js:8106 在 angular.js:1696 在 m.$eval (angular.js:16820) 在 m.$apply (angular .js:16920)

更新 1

HTML

<!DOCTYPE html>
<html ng-app="appname">

  <head>
    <link rel="stylesheet" href="style.css">
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.0/angular.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/ngStorage/0.3.6/ngStorage.min.js"></script>
    <script src="script.js"></script>
  </head>

<body ng-controller="CartController">
<a href="javascript:void(0);" ng-click="addToCart(1,'x','y','5.00');">Toevoegen</a>

<div ng-repeat='item in items'>
{{item.title}}
{{item.price | currency:"&euro;"}}
{{item.price * item.quantity | currency:"&euro;"}}
</div>

</body>
</html>

JS

<script>
angular.module('appname', ['ngStorage'])
    .controller('CartController', ['$scope, $localStorage, $sessionStorage', function CartController($scope, $localStorage, $sessionStorage) {

    if ($localStorage.items === undefined) {
        $localStorage.items = [];
    }

    $scope.remove = function(index) {
      $localStorage.items.splice(index, 1);
    };

    $scope.addToCart = function(index, title, desc, price) {
        var found = false;
        angular.forEach($localStorage.items, function(items) {
            if (items.id  === index) {
                items.quantity++;
                found = true;
            }
        });
        if (!found) {
            $localStorage.items.push(angular.extend({id: index, title: title, quantity: 1, price: price}, index));
        }
    };
  }])
</script>

谢谢

4

2 回答 2

0

通过执行以下操作解决了它：

var appname = angular.module('appname', ['ngStorage']);
appname.controller('CartController', function($scope, $localStorage, $sessionStorage) {

现在它按预期工作。

于 2016-02-15T22:27:55.630 回答
0

代替

    .controller('CartController', ['$scope', function CartController($scope, $localStorage, $sessionStorage) {

和

    .controller('CartController', ['$scope', '$localStorage', '$sessionStorage', function CartController($scope, $localStorage, $sessionStorage) {

在您的示例中未注入这些变量。尝试使用像ng-annotate这样的工具来确保这种情况不会再次发生！

于 2016-02-15T19:07:24.073 回答