javascript - AngularJS : Undefined value returned in controller

Question

我正在使用 angularJS 构建一个访问 http 资源的工厂。我可以看到数据在请求附近本地返回，但数据未在 Controller 中返回。这是我的工厂:

myNameSpace.factory('simpleFactory', function ($http) {
var factory = {};
var customers = [];
factory.getCustomers = function () {
    $http.jsonp('http://URL&callback=JSON_CALLBACK').success(function (data) {
        customers = data;
        return customers;
    })
}

return factory;

});

我的 Controller 是:

myNameSpace.controller('DetailsController', function ($scope, $http, simpleFactory) {
var cust = simpleFactory.getCustomers();
$scope.CustomerData = simpleFactory.getCustomers();
console.log(cust); //The value that is display here is undefined
});

Answer 1

$http 调用是一个 ajax 异步调用，这意味着您需要通过回调发送结果。这可能会有所帮助:

这是工厂:

myNameSpace.factory('simpleFactory', function ($http) {
var factory = {};
factory.getCustomers = function (callback) {
    $http.jsonp('http://URL&callback=JSON_CALLBACK').success(callback);
}

return factory;

});

使用方法如下:

myNameSpace.controller('DetailsController', function ($scope, $http, simpleFactory) {
    simpleFactory.getTopOffenders(function(offenders) {
        $scope.topoffendersData = offenders;
    });
});