如何引用静态类的方法供应商？ [英] How to reference a provider in static class methods?

问题描述

还没有在目前的code，但我一直在努力与喷油器的喜欢这里。当我 resolveAndCreate（）服务（尝试过其他方法注射过......）新的实例被创建，bootstraped实例被覆盖。

Don't have any code at the moment, but I've been trying standard/boilerplate syntax with Injector like here. When I resolveAndCreate() a service (tried other Injector methods too...) new instance is created and bootstraped instance is overwritten.

拟用例是 @CanActivate（）装饰。我一直在做可怕的解决方法（ - ：设置窗口[__ __准备当服务就绪，并使用，在装饰...

Intended usecase is with @CanActivate() decorator. I've been doing awful workaround (-: setting window["__ready__"] when service is ready and using that in decorator...

推荐答案

的一个解决方案是存储在专用单在引导创建的喷射器的引用。

One solution is to store a reference to the injector created at bootstrap in a dedicated singleton.

bootstrap(App, [Auth, ROUTER_PROVIDERS])
.then((appRef: ComponentRef) => {
  // store a reference to the injector
  appInjector(appRef.injector);
});

在单如下：

let appInjectorRef: Injector;
export const appInjector = (injector?: Injector):Injector => {
    if (injector) {
      appInjectorRef = injector;
    }

    return appInjectorRef;
};

然后你就可以像访问服务：

And then you can access the service like that :

let injector: Injector = appInjector(); // get the stored reference to the injector
let auth: Auth = injector.get(Auth); //get the service from the injector

下面是一个Plunker在那里你可以在行动中看到这一点。 （我不是plunker的作者，但是这是真的对我很有帮助）： HTTP ：？//plnkr.co/edit/SF8gsYN1SvmUbkosHjqQ p = preVIEW

Here is a Plunker where you can see this in action. (I am not the author of the plunker, but this was really helpful to me) : http://plnkr.co/edit/SF8gsYN1SvmUbkosHjqQ?p=preview

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