将数据从子选项卡传递到Ionic 2中的父选项卡

import { Component, Output, EventEmitter } from '@angular/core';

@Component({
  selector: 'child-tab',
  template: `
    <button (click)="sendData()">传递数据到父选项卡</button>
  `
})
export class ChildTab {
  @Output() dataEvent = new EventEmitter<string>();

  sendData() {
    const data = '这是要传递的数据';
    this.dataEvent.emit(data);
  }
}

import { Component } from '@angular/core';

@Component({
  selector: 'parent-tab',
  template: `
    <child-tab (dataEvent)="receiveData($event)"></child-tab>
    <div>{{ receivedData }}</div>
  `
})
export class ParentTab {
  receivedData: string;

  receiveData(data: string) {
    this.receivedData = data;
  }
}