如何以角度在 CustomReuseStrategy 中注入服务? [英] How to inject a service in CustomReuseStrategy in angular?

问题描述

我已经在 Angular 中实现了 CustomReuseStrategy.我想订阅 shouldAttach() 中的一个 observable 以确定是否应该重新附加路由.我在服务中创建了一个 observable，我需要在 CustomReuseStrategy 中使用服务实例.我尝试在构造函数中注入服务，但出现此错误:

I have implemented CustomReuseStrategy in Angular. I want to subscribe to an observable in shouldAttach() to determine if the route should be reattached or not. I have created an observable in a service and I need to use the service instance in CustomReuseStrategy. I tried injecting the service in the constructor and I get this error:

无法解析 CustomReuseStrategy 的所有参数

Can't resolve all parameters for CustomReuseStrategy

RouteReuseStrategy 的构造函数应该没有参数吗?如果是这样，我该如何创建服务的实例?

Should the constructor for the RouteReuseStrategy not have parameters? If so, how do I create the instance of the service?

推荐答案

我已经使用反射注入器解决了这个问题.

I have resolved this by using Reflective Injector.

let injector = ReflectiveInjector.resolveAndCreate([MyService]);
this.subscriptionSvc = injector.get(MyService);

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