本文介绍了如何在不使用构造函数DI的情况下创建Http实例?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

出于某种原因,我不想使用构造函数(私有http:Http)DI。

For some reason, I don't want to use constructor(private http: Http) DI.

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并尝试

const injector = ReflectiveInjector.resolveAndCreate([
  BaseRequestOptions,
  XHRConnection,
  {
    provide: Http,
    useFactory: (backend, defaultOptions) => new Http(backend, defaultOptions),
    deps: [XHRConnection, BaseRequestOptions]
  }
]);

this.http = injector.get(Http);

错误说


推荐答案

您需要提供 HTTP_PROVIDERS

const injector = ReflectiveInjector.resolveAndCreate([
  HTTP_PROVIDERS,
  XHRConnection,
  {
    provide: Http,
    useFactory: (backend, defaultOptions) => new Http(backend, defaultOptions),
    deps: [XHRConnection, BaseRequestOptions]
  }
]);

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08-20 06:16
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