扩展现有服务的角度 [英] Extend existing service in angular

问题描述

我正在使用角度咆哮服务(角度咆哮)，我需要一种方法添加特定类型的咆哮声，例如

I'm using angular growl service (angular-growl), and i need one method to add growl with specific type, e.g.

.controller('Controller', ['$scope', 'growl', function ($scope, growl) {
     growl.add("Message", "INFO");
}

在角度启动过程中是否可以将新方法附加到咆哮服务(或将方法附加到任何服务)?

is it possible to append new method to growl service (or append method to any service) when angular start process?

推荐答案

基本上，您可以使用Angular decorator 的概念来扩展现有服务.这是通过 $ provide.decorator 完成的.一个实现看起来像这样:

Basically you can use the concept of Angular decorator to extend the existing service. This is done through $provide.decorator. An implementation would look something like this:

app.config(function($provide) {
  $provide.decorator('growl', function($delegate) {
    $delegate.add = function(message, type) {
      // implementation for add.
    };
    return $delegate;
  });
});

在此SO帖子中了解有关此内容的更多信息什么是";装饰器"以及如何使用?

Read more about it in this SO post What are "decorators" and how are they used?

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