这是我的版本:

export interface IEventListenr extends OnDestroy{
    ngOnDestroy(): void
}

@Injectable()
export class EventManagerService {


    private listeners = {};
    private subject = new EventEmitter();
    private eventObserver = this.subject.asObservable();


    constructor() {

        this.eventObserver.subscribe(({name,args})=>{



             if(this.listeners[name])
             {
                 for(let listener of this.listeners[name])
                 {
                     listener.callback(args);
                 }
             }
        })

    }

    public registerEvent(eventName:string,eventListener:IEventListenr,callback:any)
    {

        if(!this.listeners[eventName])
             this.listeners[eventName] = [];

         let eventExist = false;
         for(let listener of this.listeners[eventName])
         {

             if(listener.eventListener.constructor.name==eventListener.constructor.name)
             {
                 eventExist = true;
                 break;
             }
         }

        if(!eventExist)
        {
             this.listeners[eventName].push({eventListener,callback});
        }
    }

    public unregisterEvent(eventName:string,eventListener:IEventListenr)
    {

        if(this.listeners[eventName])
        {
            for(let i = 0; i<this.listeners[eventName].length;i++)
            {

                if(this.listeners[eventName][i].eventListener.constructor.name==eventListener.constructor.name)
                {
                    this.listeners[eventName].splice(i, 1);
                    break;
                }
            }
        }


    }


    emit(name:string,...args:any[])
    {
        this.subject.next({name,args});
    }
}

use:

export class <YOURCOMPONENT> implements IEventListener{

  constructor(private eventManager: EventManagerService) {


    this.eventManager.registerEvent('EVENT_NAME',this,(args:any)=>{
       ....
    })


  }

  ngOnDestroy(): void {
    this.eventManager.unregisterEvent('closeModal',this)
  }

}

发出:

 this.eventManager.emit("EVENT_NAME");

您可以使用EventEmitter或可观察对象来创建向DI注册的事件总线服务。每个想要参与的组件只需将服务作为构造函数参数请求，并发出和/或订阅事件。

另请参阅

https://angular.io/docs/ts/latest/cookbook/component-communication.html !# bidirectional-service 委托:在Angular2中的EventEmitter或Observable

服务事件:组件可以订阅服务事件。例如，两个兄弟组件可以订阅相同的服务事件，并通过修改各自的模型进行响应。下文将详细介绍。

但是要确保在销毁父组件时取消订阅。

下面的代码是Angular 2中使用共享服务来处理事件的$scope.emit()或$scope.broadcast()的替换示例。

import {Injectable} from 'angular2/core';
import * as Rx from 'rxjs/Rx';

@Injectable()
export class EventsService {
    constructor() {
        this.listeners = {};
        this.eventsSubject = new Rx.Subject();

        this.events = Rx.Observable.from(this.eventsSubject);

        this.events.subscribe(
            ({name, args}) => {
                if (this.listeners[name]) {
                    for (let listener of this.listeners[name]) {
                        listener(...args);
                    }
                }
            });
    }

    on(name, listener) {
        if (!this.listeners[name]) {
            this.listeners[name] = [];
        }

        this.listeners[name].push(listener);
    }

    off(name, listener) {
        this.listeners[name] = this.listeners[name].filter(x => x != listener);
    }

    broadcast(name, ...args) {
        this.eventsSubject.next({
            name,
            args
        });
    }
}

使用示例:

广播:

function handleHttpError(error) {
    this.eventsService.broadcast('http-error', error);
    return ( Rx.Observable.throw(error) );
}

听众:

import {Inject, Injectable} from "angular2/core";
import {EventsService}      from './events.service';

@Injectable()
export class HttpErrorHandler {
    constructor(eventsService) {
        this.eventsService = eventsService;
    }

    static get parameters() {
        return [new Inject(EventsService)];
    }

    init() {
        this.eventsService.on('http-error', function(error) {
            console.group("HttpErrorHandler");
            console.log(error.status, "status code detected.");
            console.dir(error);
            console.groupEnd();
        });
    }
}

它可以支持多个参数:

this.eventsService.broadcast('something', "Am I a?", "Should be b", "C?");

this.eventsService.on('something', function (a, b, c) {
   console.log(a, b, c);
});

不要使用EventEmitter来进行服务通信。

你应该使用Observable类型之一。我个人喜欢BehaviorSubject。

简单的例子:

你可以传递初始状态，这里我传递null

let subject = new BehaviorSubject(null);

当你想要更新主题时

next (myObject)科目。

观察任何服务或组件，并在其获得新的更新时采取行动。

subject.subscribe (this.YOURMETHOD);

这里有更多信息。

这是我的版本:

export interface IEventListenr extends OnDestroy{
    ngOnDestroy(): void
}

@Injectable()
export class EventManagerService {


    private listeners = {};
    private subject = new EventEmitter();
    private eventObserver = this.subject.asObservable();


    constructor() {

        this.eventObserver.subscribe(({name,args})=>{



             if(this.listeners[name])
             {
                 for(let listener of this.listeners[name])
                 {
                     listener.callback(args);
                 }
             }
        })

    }

    public registerEvent(eventName:string,eventListener:IEventListenr,callback:any)
    {

        if(!this.listeners[eventName])
             this.listeners[eventName] = [];

         let eventExist = false;
         for(let listener of this.listeners[eventName])
         {

             if(listener.eventListener.constructor.name==eventListener.constructor.name)
             {
                 eventExist = true;
                 break;
             }
         }

        if(!eventExist)
        {
             this.listeners[eventName].push({eventListener,callback});
        }
    }

    public unregisterEvent(eventName:string,eventListener:IEventListenr)
    {

        if(this.listeners[eventName])
        {
            for(let i = 0; i<this.listeners[eventName].length;i++)
            {

                if(this.listeners[eventName][i].eventListener.constructor.name==eventListener.constructor.name)
                {
                    this.listeners[eventName].splice(i, 1);
                    break;
                }
            }
        }


    }


    emit(name:string,...args:any[])
    {
        this.subject.next({name,args});
    }
}

use:

export class <YOURCOMPONENT> implements IEventListener{

  constructor(private eventManager: EventManagerService) {


    this.eventManager.registerEvent('EVENT_NAME',this,(args:any)=>{
       ....
    })


  }

  ngOnDestroy(): void {
    this.eventManager.unregisterEvent('closeModal',this)
  }

}

发出:

 this.eventManager.emit("EVENT_NAME");