Angular 2错误:提供程序无效-仅允许提供程序和类型的实例，得到了:[object Object]

问题描述

我正在将ui-router2与angular2-rc-4集成在一起，但是我得到了

I am integrating ui-router2 with angular2-rc-4 but i am getting

以下是引导代码

    import {trace, UIROUTER_PROVIDERS, UIView, UIRouterConfig, Category, UIROUTER_DIRECTIVES} from "ui-router-ng2";
    import {HTTP_PROVIDERS} from "@angular/http";
    import {provide, PLATFORM_DIRECTIVES} from "@angular/core";
    import {LocationStrategy, HashLocationStrategy, PathLocationStrategy, PlatformLocation} from "@angular/common";
    import {BrowserPlatformLocation} from '@angular/platform-browser';
    import 'rxjs/add/operator/toPromise';
    import 'rxjs/add/operator/map';

    import { APP_BASE_HREF } from '@angular/common';
    import { disableDeprecatedForms, provideForms } from '@angular/forms';
    import { enableProdMode } from '@angular/core';
    import { bootstrap } from '@angular/platform-browser-dynamic';

    import { InitialStates } from './app.routes';
    import { AppComponent } from './app.component';
    import {MyUIRouterConfig} from "./_bootstrap/router.config";

    if ('' === 'prod') { enableProdMode(); }

    trace.enable(Category.TRANSITION, Category.VIEWCONFIG);

    bootstrap(UIView, [
        disableDeprecatedForms(),
        provideForms(),
        InitialStates,
        {
          provide: APP_BASE_HREF,
          useValue: ''
         },


         provide(LocationStrategy, { useClass: HashLocationStrategy }),

         provide(LocationStrategy, { useClass: PathLocationStrategy }),
         provide(PlatformLocation, { useClass: BrowserPlatformLocation }),

        ...UIROUTER_PROVIDERS,
        ...HTTP_PROVIDERS,

        provide(UIRouterConfig, { useClass: MyUIRouterConfig }),

        provide(PLATFORM_DIRECTIVES, {useValue: [UIROUTER_DIRECTIVES], multi: true})
    ]);

以下是我的路由器配置.

Following is my router config.

import {UIRouter} from "ui-router-ng2";
import {InitialStates} from "../app.routes";
import {Injectable, Injector} from "@angular/core";

@Injectable()
export class MyUIRouterConfig {
  constructor(private injector: Injector) {}

  configure(uiRouter: UIRouter) {
    // Register each state definition (from app.states.ts) with the StateRegistry
    InitialStates.forEach(state => uiRouter.stateRegistry.register(state));

    // Define a default behavior, for when the URL matched no routes
    uiRouter.urlRouterProvider.otherwise(() => uiRouter.stateService.go("app", null, null) && null);
  }
}

推荐答案

如果您输入以下内容，则会为一个简单的错字引发相同的错误:

The same error is thrown for a simple typo, if you write this:

{ provider: MyService, useValue: myServiceMock }

代替此:

{ provide: MyService, useValue: myServiceMock }

请注意 provider 和 provide 之间的区别.正确的是提供.

Note the difference between provider and provide. The correct is provide.

希望这会有所帮助.

这篇关于Angular 2错误:提供程序无效-仅允许提供程序和类型的实例，得到了:[object Object]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！