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本篇文章給大家分享的是有關怎么在angularjs中使用http與后臺進行交互,小編覺得挺實用的,因此分享給大家學習,希望大家閱讀完這篇文章后可以有所收獲,話不多說,跟著小編一起來看看吧。
HttpModule引入
找到app.module.ts文件
import { NgModule, ErrorHandler } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular'; import { MyApp } from './app.component'; import { LoginPage } from "../pages/login/login"; /** 引入HttpClientModule模塊 */ import { HttpClientModule } from "@angular/common/http"; import { RequestServiceProvider } from "../providers/request-service/request-service"; import { StatusBar } from '@ionic-native/status-bar'; import { SplashScreen } from '@ionic-native/splash-screen'; @NgModule({ declarations: [ MyApp, LoginPage, ], imports: [ BrowserModule, /** 導入模塊 */ HttpClientModule, IonicModule.forRoot(MyApp,{ tabsHideOnSubPages:'true', backButtonText:'' }) ], bootstrap: [IonicApp], entryComponents: [ MyApp, LoginPage, ], providers: [ StatusBar, SplashScreen, {provide: ErrorHandler, useClass: IonicErrorHandler}, RequestServiceProvider, ] }) export class AppModule {}
按照自己的項目導入HttpClientModule模塊即可,我導入其他組件,不用考慮。
3.創建服務
ionic g provider RequestService
執行完成后則會出現如下文件
4.封裝服務
/** 導入http相關 */ import { HttpClient,HttpHeaders } from '@angular/common/http'; import { Injectable } from '@angular/core'; import {Observable} from "rxjs"; /* Generated class for the RequestServiceProvider provider. See https://angular.io/guide/dependency-injection for more info on providers and Angular DI. */ @Injectable() export class RequestServiceProvider { /** 講基礎路徑提取說出來,配置ip和端口時只需要在這修改 */ //basePath:string='http://10.4.0.205:8081' reserveBasePath:string='http://10.6.254.110:8081' basePath=this.reserveBasePath; /** 封裝固定的消息頭相關 */ private headers = new HttpHeaders({'Content-Type': 'application/json'}) // private headers = new HttpHeaders({'Access-Control-Allow-Origin':'*'}); /** 初始化http變量 */ constructor(public http: HttpClient) { console.log('Hello RequestServiceProvider Provider'); } /** 給外界提供了四個基礎的方法只需要傳入uri和data即可 */ get(req:any):Observable<any> { return this.http.get(this.basePath+req.uri,{headers:this.headers}); } post(req:any):Observable<any>{ return this.http.post(this.basePath+req.uri,req.data,{headers:this.headers}); } put(req:any):Observable<any>{ return this.http.put(this.basePath+req.uri,req.data,{headers:this.headers}); } delete(req:any):Observable<any>{ return this.http.delete(this.basePath+req.uri,{headers:this.headers}); } }
5.導入聲明封裝服務
找到app.module.ts文件和第一部類似
import { NgModule, ErrorHandler } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular'; import { MyApp } from './app.component'; import { LoginPage } from "../pages/login/login"; /** 引入HttpClientModule模塊 */ import { HttpClientModule } from "@angular/common/http"; /** 導入自定的服務 */ import { RequestServiceProvider } from "../providers/request-service/request-service"; import { StatusBar } from '@ionic-native/status-bar'; import { SplashScreen } from '@ionic-native/splash-screen'; @NgModule({ declarations: [ MyApp, LoginPage, ], imports: [ BrowserModule, /** 導入模塊 */ HttpClientModule, IonicModule.forRoot(MyApp,{ tabsHideOnSubPages:'true', backButtonText:'' }) ], bootstrap: [IonicApp], entryComponents: [ MyApp, LoginPage, ], providers: [ StatusBar, SplashScreen, {provide: ErrorHandler, useClass: IonicErrorHandler}, /** 聲明服務 */ RequestServiceProvider, ] }) export class AppModule {}
6.使用服務
找到自己的頁面所對應的ts文件如下面代碼一樣
import { Component } from '@angular/core'; import { IonicPage, NavController, NavParams } from 'ionic-angular'; /** 導入聲明 */ import {RequestServiceProvider} from "../../providers/request-service/request-service"; /** * Generated class for the LoginPage page. * * See https://ionicframework.com/docs/components/#navigation for more info on * Ionic pages and navigation. */ @IonicPage() @Component({ selector: 'page-login', templateUrl: 'login.html', }) export class LoginPage { title:string = '登錄' promptMessage:string = '' user={ username:'', password:'' } req={ login:{ uri:'/user/login' } } constructor(public navCtrl: NavController, public navParams: NavParams, /** 初始化服務對象 */ private requestService:RequestServiceProvider) { } ionViewDidLoad() { console.log('ionViewDidLoad LoginPage'); } login(){ /** 調用post方法,subscribe()方法可以出發請求,調用一次發送一次,調用多次發多次 */ this.requestService.post({uri:this.req.login.uri,data:user}).subscribe((res:any)=>{ console.log(res); if (res.code == 0){ this.promptMessage = res.message; } else { this.promptMessage = res.message; } }, error1 => { alert(JSON.stringify(error1)) }); } }
以上就是怎么在angularjs中使用http與后臺進行交互,小編相信有部分知識點可能是我們日常工作會見到或用到的。希望你能通過這篇文章學到更多知識。更多詳情敬請關注億速云行業資訊頻道。
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