javascript - 使用 $scope 访问 Angular 重用函数

Question

我正在解决在两个 Controller 中通过范围访问重用相同函数的问题在这里描述: How to include/inject functions which use $scope into a controller in angularjs?

在 Controller 中:

new CommonService($scope).getSomethingFromDB();

在工厂:

services.factory("CommonService", function (DBService) {

function Factory ($scope) {

    this.$scope = $scope;
}

Factory.prototype.getSomethingFromDB = function () {
    if( angular.isUndefined(this.$scope.vrsteObracuna) || this.$scope.vrsteObracuna === null) {

        this.$scope.loading = true;
        DBService.getSomethingFromDB(
            function success(data) {
                this.$scope.loading = false; //ERROR !!!
                this.$scope.vrsteObracuna = data;
            },
            function error(data, status, headers, config) {
                this.$scope.loading = false;
                etna.notifications.error("Error fetching!");
            }
        )
    }

    return this.$scope.vrsteObracuna;
}

return Factory;
});

问题是从 DBService.getSomethingFromDB 成功回调后this.$scope.loading 未定义？

Answer 1

您还没有将 $scope 放入“成功”闭包中，请尝试使用此代码:

services.factory("CommonService", function (DBService) {

function Factory ($scope) {

    this.$scope = $scope;
}

Factory.prototype.getSomethingFromDB = function () {
    if( angular.isUndefined(this.$scope.vrsteObracuna) || this.$scope.vrsteObracuna === null) {

        this.$scope.loading = true;
        var that = this;
        DBService.getSomethingFromDB(
            function success(data) {
                that.$scope.loading = false; //ERROR !!!
                that.$scope.vrsteObracuna = data;
            },
            function error(data, status, headers, config) {
                that.$scope.loading = false;
                etna.notifications.error("Error fetching!");
            }
        )
    }

    return this.$scope.vrsteObracuna;
}

return Factory;
});