Question

在路线之间保存数据的最佳方法是什么？所以我有一个有4个步骤的表单，我希望将上一步的数据转移到下一步。

现在，我正在使用“服务”来保存数据，这是有效的。然而，问题是因为“服务”是单一的，从表单导航，然后回到它，仍然会包含以前不完整或被遗弃的形式的所有数据。

有没有好办法解决这种情况？

谢谢你，
三通

Answer 1

为什么不在以下情况下增强服务以处理删除存储的数据：

用户未完成表单并导航离开整个表单提交过程
用户提交表单

基本上，您可以按如下方式增强服务：

myApp.factory('myService', function () {
    var formData = {};

    return {
        getData: function () {
            //You could also return specific attribute of the form data instead
            //of the entire data
            return formData;
        },
        setData: function (newFormData) {
            //You could also set specific attribute of the form data instead
            formData = newFormData
        },
        resetData: function () {
            //To be called when the data stored needs to be discarded
            formData = {};
        }
    };
});

您的控制器可以如下：

myApp.controller('FirstStepCtrl', ['$scope', 'myService', function ($scope, myService) {
    //This is the controller of the first step in the form
    //Reset the data to discard the data of the previous form submission
    myService.resetData();

    //Remaining Logic here
}]);

myApp.controller('LastStepCtrl', ['$scope', 'myService', function ($scope, myService) {
    //This is the controller of the last step in the form

    //Submits the form
    $scope.submitForm = function () {
        //Code to submit the form

        //Reset the data before changing the route - assuming successful submission
        myService.resetData();

        //Change the route
    };

    //Remaining Logic here
}]);

另一种方法是在路由更改为不在表单应用程序中的内容时调用服务的resetData()函数。如果您有Form控制器的父控制器之类的东西，那么在该控制器中，您可以监视路径更改：

$scope.$on('$routeChangeStart', function() { 
   //Use $location.path() to get the current route and check if the route is within the 
   //form application. If it is, then ignore, else call myService.resetData()

   //This way, the data in the forms is still retained as long as the user is still
   //filling up the form. The moment the user moves away from the form submission process,
   //for example, when explicitly navigating away or when submitting the form, 
   //the data is lost and no longer available the next time the form is accessed
 });

Answer 2

Services将在您的应用程序的整个生命周期中持续存在。所以你不应该有任何问题。您需要做的就是创建一个Service并将其注入需要访问它的控制器。例如，下面我向控制器注入了User服务。

只需为每个路径使用不同的控制器，这样就不会覆盖范围内的模型。

第一条路线的第一个控制器，

app.controller("FirstPageController", function($scope,User){   
    $scope.user = User;
    $scope.user.firstName  = "Emre";
    $scope.user.secondName = "Nevayeshirazi";
});

第二路线的第二个控制器，

app.controller("SecondPageController", function($scope,User){ 
    $scope.user = User;  
    $scope.user.age = 24;
});

AngularJS - 在路由之间保存数据

2 个答案: