Angular2中手动依赖注入的问题

Question

我不确定这是一个错误还是我做错了什么（问题是后者）。 我正在尝试手动实例化名为TodoService的组件。

前两个步骤的一切都很棒

var myProvider = new Provider(TodosService, {
  useFactory: (todoAction, http, todoStatsModel, appStore) => {
  return new todoAction(TodoAction, http, todoStatsModel, appStore)
},
  deps: [TodoAction, Http, TodoStatsModel, AppStore]
});
var injector =  Injector.resolveAndCreate([myProvider]);

但是当我试图获得它时会爆炸，所以我可以使用它

var myTodoService = injector.get(TodosService)

我做错了什么（可能在获得）？

Answer 1

var injector =  Injector.resolveAndCreate([myProvider, TodoAction, Http, TodoStatsModel, AppStore]);

我认为你最好不要使用只用

的工厂

var injector =  Injector.resolveAndCreate(
    [TodoService, TodoAction, Http, TodoStatsModel, 
     provide(AppStore, {useValue: new AppStore('')}
     // or
     // provide(AppStore, {useFactory: () => {
     //     return new AppStore('');
     // })
    ]);
var myTodoService = injector.get(TodosService)

Answer 2

Tx到GünterZöchbaue为我解决了这个问题......他是男人!!!

这是其他人的代码：

constructor(private appStore:AppStore) {
    super();
}

private factoryService(){
    if (this.service)
        return;
    var injector = Injector.resolveAndCreate(
        [
            TodosService,
            TodoAction,
            HTTP_PROVIDERS,
            TodoStatsModel,
            provide(AppStore, {useValue: this.appStore})
        ]);

    this.service = injector.get(TodosService);
    service.sayHello('Sean');
}

基本上通过多个依赖项（甚至一个vanilla非组件（类）AppStore）手动创建“TodoService”Angular2组件，所有这些都通过注入器... wooof ...！