我有两个供应商。供应商在Ionic2/Angular2中的应用程序
AppStorage负责设置并从存储中获取值。
import { Injectable } from '@angular/core'; import {Http, Headers, RequestOptions} from '@angular/http'; import {Observable} from 'rxjs/Rx'; import {Storage} from '@ionic/storage'; @Injectable() export class AppStorage { constructor(public http: Http, private storage:Storage) { console.log('Hello Appstorage Provider'); } setValue(key,value){ var setPromise = new Promise((resolve,reject)=>{this.storage.set(key,value).then((res)=>{ return resolve(res); }) }); return setPromise; }; getValue(key){ var getPromise = new Promise((resolve,reject)=>{this.storage.get(key).then((val)=>{ return resolve(val); }); }); return getPromise; } }
OauthService这是我的api服务。
import {Http, Headers, RequestOptions} from '@angular/http'; import { Injectable, Inject} from '@angular/core'; import 'rxjs/add/operator/map'; import { AppStorage } from '../providers/appstorage'; @Injectable() export class OauthService{ http: Http; response :any; appStorage: AppStorage; static get parameters() { return [[Http]]; } constructor(http: Http,@Inject(AppStorage) appStorage: AppStorage){ this.http = http; this.appStorage = appStorage; setTimeout(()=>{ console.log('Hello OauthService Provider'+this.appStorage+"===="+this.http); },3000) //output - >Hello OauthService Providerundefined====[object Object] } }
现在我将两个注射到我的app.module
import { NgModule, ErrorHandler } from '@angular/core';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';
import { LoginPage } from '../pages/login/login';
import { AppStorage } from '../providers/appstorage';
import { Storage } from '@ionic/storage';
import { OauthService } from '../providers/oauthservice';
@NgModule({
declarations: [
MyApp,
LoginPage
],
imports: [
IonicModule.forRoot(MyApp)
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
LoginPage
],
providers: [{provide: ErrorHandler, useClass: IonicErrorHandler},OauthService, Storage, AppStorage]
})
export class AppModule {}
但是,当我运行的应用程序,在oauthService的构造函数中appStorage对象来为未定义。 你能告诉我我正在做什么错误,我只是在另一项服务中注入服务。
而不是'''@注入(AppStorage)appStorage:AppStorage)'''之后'''this.appStorage = appStorage;'''你可以做'''私人appStorage:AppStorage)'''。私人会自动将对象粘贴到此处。不知道这是否会改变你的问题。 –
没有一个人在工作... – RHUL
你在控制台中看到'Hello Appstorage Provider'吗? –