要实现Angular 6消息总线，可以使用一个共享服务来传递消息。以下是一个包含代码示例的解决方案：

1. 创建一个共享服务，例如MessageService：

import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class MessageService {
  private subject = new Subject();

  sendMessage(message: string) {
    this.subject.next({ text: message });
  }

  clearMessage() {
    this.subject.next();
  }

  getMessage() {
    return this.subject.asObservable();
  }
}

2. 在发送消息的组件中注入MessageService，并调用sendMessage方法发送消息：

import { Component } from '@angular/core';
import { MessageService } from './message.service';

@Component({
  selector: 'app-sender',
  template: `
    发送消息
  `
})
export class SenderComponent {
  constructor(private messageService: MessageService) {}

  sendMessage() {
    this.messageService.sendMessage('Hello, World!');
  }
}

3. 在接收消息的组件中注入MessageService，并调用getMessage方法获取消息：

import { Component, OnInit } from '@angular/core';
import { MessageService } from './message.service';

@Component({
  selector: 'app-receiver',
  template: `
    
接收到的消息: {{ message }}
  `
})
export class ReceiverComponent implements OnInit {
  message: string;

  constructor(private messageService: MessageService) {}

  ngOnInit() {
    this.messageService.getMessage().subscribe(message => {
      this.message = message.text;
    });
  }
}

4. 在模块中声明和提供MessageService：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SenderComponent } from './sender.component';
import { ReceiverComponent } from './receiver.component';
import { MessageService } from './message.service';

@NgModule({
  imports: [BrowserModule],
  declarations: [AppComponent, SenderComponent, ReceiverComponent],
  providers: [MessageService],
  bootstrap: [AppComponent]
})
export class AppModule {}

通过这种方式，SenderComponent可以发送消息到MessageService，ReceiverComponent可以订阅MessageService来接收消息。当SenderComponent调用sendMessage方法时，ReceiverComponent将接收到消息并显示在页面上。

希望以上解决方案能够解决你的问题！