Ionic 2 HTTP请求不起作用-角度2

Question

你好，我正在尝试做一个简单的Http GET请求，但是无法在ionic v2 Beta中运行...

这是我的应用程序.js：

import {App, Platform} from 'ionic-angular';
import {TabsPage} from './pages/tabs/tabs';
import {HTTP_BINDINGS} from 'angular2/http';


@App({
  template: '<ion-nav [root]="rootPage"></ion-nav>',
  providers: [HTTP_BINDINGS],
  config: {} // http://ionicframework.com/docs/v2/api/config/Config/
})
export class MyApp {
  static get parameters() {
    return [[Platform]];
  }

  constructor(platform) {
    this.rootPage = TabsPage;

    platform.ready().then(() => {

    });
  }
}

这是我的页面1.js：

import {Page} from 'ionic-angular';
import {Http} from 'angular2/http';


@Page({
  templateUrl: 'build/pages/page1/page1.html'
})

export class Page1 {
    constructor(http:Http) {

        this.mget = http.get("https://httpbin.org/ip")
        .subscribe(data => {
            var alert = Alert.create({
                title: "Your IP Address",
                subTitle: data.json().origin,
                buttons: ["close"]
            });
            this.nav.present(alert);
        }, error => {
            console.log(JSON.stringify(error.json()));
        });
    }
}

将http:http添加到构造函数时-

错误：找不到模块“./page1/page1”

我也在Page1.js尝试过：

export class Page1 {
    constructor() {

    }

    makeGetRequest() {
        this.http.get("https://httpbin.org/ip")
        .subscribe(data => {
            var alert = Alert.create({
                title: "Your IP Address",
                subTitle: data.json().origin,
                buttons: ["close"]
            });
            this.nav.present(alert);
        }, error => {
            console.log(JSON.stringify(error.json()));
            console.log('yolo')
            alert('hello');
        });
    }
}

，然后在第 1 页中的（单击）上调用生成生成请求（）.html但它返回这些注释：

例外：评估“单击”时出错

this.http未定义

请帮忙！：）

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-

这是解决方案:

page1.js：

import {Page} from 'ionic-angular';
import {Http} from 'angular2/http';

@Page({
  templateUrl: 'build/pages/page1/page1.html'
})

export class Page1 {
     static get parameters(){
       return [Http];
       }
    constructor(http) {
        this.http = http;

        this.mget = this.http.get("https://httpbin.org/ip")
        .subscribe(data => {
            console.log(data);
        }, error => {
            console.log('faild');
        });
    }
}

app.js:

import {App, Platform} from 'ionic-angular';
import {TabsPage} from './pages/tabs/tabs';
import { HTTP_PROVIDERS } from 'angular2/http';


@App({
  template: '<ion-nav [root]="rootPage"></ion-nav>',
  providers: [HTTP_PROVIDERS],
  config: {} // http://ionicframework.com/docs/v2/api/config/Config/
})
export class MyApp {
  static get parameters() {
    return [[Platform]];
  }

  constructor(platform) {
    this.rootPage = TabsPage;

    platform.ready().then(() => {

    });
  }
}

Answer 1

我相信您需要＜code＞从“angular2/HTTP”导入｛HTTP_PROVIDERS｝ 应用程序中的code>。js而不是HTTP_BINDINGS，并将提供程序：[HTTP_BINDINGS]

参见Angular2文档

Answer 2

请尝尝这个

export class Page1 {
     static get parameters(){
       return [Http];
       }
    constructor(http) {
        this.http = http;
        this.mget = this.http.get("https://httpbin.org/ip")
        .subscribe(data => {
            var alert = Alert.create({
                title: "Your IP Address",
                subTitle: data.json().origin,
                buttons: ["close"]
            });
            this.nav.present(alert);
        }, error => {
            console.log(JSON.stringify(error.json()));
        });
    }
}

我建议您在单独的服务中编写get请求并将其注入您的页面。

也看看这个-http://tphangout.com/?p=113

那里给出了从Ionic 2应用程序发出简单GET请求的详细而简单的说明。