更新ionic 3中的全局变量

ionic generate service globals

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

@Injectable({
  providedIn: 'root'
})
export class GlobalsService {
  private myGlobalVar: any;

  constructor() { }

  getGlobalVar(): any {
    return this.myGlobalVar;
  }

  setGlobalVar(value: any): void {
    this.myGlobalVar = value;
  }
}

import { Component } from '@angular/core';
import { GlobalsService } from '../globals.service';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.scss'],
})
export class MyComponent {
  constructor(private globals: GlobalsService) { }

  updateGlobalVar(value: any): void {
    this.globals.setGlobalVar(value);
  }
}

import { Component } from '@angular/core';
import { GlobalsService } from '../globals.service';

@Component({
  selector: 'app-another-component',
  templateUrl: './another-component.component.html',
  styleUrls: ['./another-component.component.scss'],
})
export class AnotherComponent {
  myVar: any;

  constructor(private globals: GlobalsService) { }

  ngOnInit(): void {
    this.myVar = this.globals.getGlobalVar();
  }
}