在 AngularJS 中将服务转换为工厂

Question

我在angularjs里面写了下面的服务，how/what要不要改成工厂？另外，当使用工厂而不是服务时，advantages/differences 是什么？

angular.module('helloApp').service('popupService', function() {
    var popup;

    var setter = function(parameter) {
        popup = parameter;
    };

    var getter = function() {
        return popup;
    };

    return {
        setter: setter,
        getter: getter
    };
});

提前致谢

Answer 1

要更改它，您首先应在模块中将其声明为工厂

angular.module('helloApp').factory('popupService', function() {
    var popup;

    var setter = function(parameter) {
        popup = parameter;
    };

    var getter = function() {
        return popup;
    };

    return {
        setter: setter,
        getter: getter
    };
}

这个问题（工厂 VS 服务）是 Whosebug 中最受欢迎的问题之一：AngularJS: Service vs provider vs factory

Services

Syntax: module.service( 'serviceName', function );

Result: When declaring serviceName as an injectable argument you will be provided with an instance of the function. In other words new FunctionYouPassedToService().

Factories

Syntax: module.factory( 'factoryName', function );

Result: When declaring factoryName as an injectable argument you will be provided with the value that is returned by invoking the function reference passed to module.factory.

官方文档

您还可以在 Angular 网站上找到官方文档：

• Factory definition
• Service definition