NgZone / Angular2 / Ionic2 TypeError：无法读取未定义的属性’run’

我收到此错误TypeError：无法在Subscriber.js中读取未定义的属性’run’：229并且不知道为什么 – 在离子beta 10中这个代码工作正常…在11中没有.

import {Component,NgZone} from '@angular/core';
import {NavController} from 'ionic-angular';
 
declare var io;
 
@Component({
  templateUrl: 'build/pages/home/home.html'
})    
export class HomePage {
    static get parameters() {
        return [NgZone];
    }
 
    zone: any;
    chats: any;
    chatinp: any;
    socket: any;
 
constructor(public navCtrl: NavController,ngzone) {
    this.zone = ngzone;
    this.chats = [];
    this.chatinp ='';
    this.socket = io('http://localhost:3000');
    this.socket.on('message',(msg) => {
        this.zone.run(() => {
            this.chats.push(msg);
        });
    });
}
 
send(msg) {
    if(msg != ''){
        this.socket.emit('message',msg);
    }
    this.chatinp = '';
   }
}

而不是像这样注入它：

static get parameters() {
  return [NgZone];
}

你为什么不这样做：

import { Component,NgZone } from "@angular/core";
 
@Component({
  templateUrl:"home.html"
})
export class HomePage {
 
  public chats: any;
 
  constructor(private zone: NgZone) {
 
    this.chats = [];
    let index: number = 1;
 
    // Even though this would work without using Zones,the idea is to simulate
    // a message from a socket.
    setInterval(() => { this.addNewChat('Message ' + index++); },1000);
  }
 
  private addNewChat(message) {
    this.zone.run(() => {
        this.chats.push(message);
    });
  }
}

我正在添加私有区域：NgZone作为构造函数中的参数,然后我可以通过使用区域变量来使用run()方法,如下所示：

this.zone.run(() => {
  // ... your code
});

NgZone / Angular2 / Ionic2 TypeError：无法读取未定义的属性’run’

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