离子3未明(承诺)：[物体]
离子3未明(承诺)：[物体]
提问于 2018-03-16 21:45:31
我是新来的Ionic 3和移动开发。我正在尝试将一个MySQL数据库连接到我的Ionic应用程序和一个。我用Postman测试了API，它运行得很好，为了用Ionic实现它，我做了以下工作，我首先创建了一个名为Authservice的提供者：
import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import 'rxjs/add/operator/map';
let apiUrl = "http://localhost/api/"
/*
Generated class for the AuthServiceProvider provider.
See https://angular.io/guide/dependency-injection for more info on
and Angular DI.
*/
@Injectable()
export class AuthServiceProvider {
constructor(public http: HttpClient) {
console.log('Hello AuthServiceProvider Provider');
}
postData(credentials, type) {
return new Promise((resolve, reject) => {
let headers = new HttpHeaders();
this.http.post(apiUrl + type, JSON.stringify(credentials), { headers: headers })
.subscribe(res => {
resolve(res.json());
}, (err) => {
reject(err);
});
});
}
}还有一个注册页面：
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { AuthServiceProvider } from '../../providers/auth-service/auth- service';
/**
* Generated class for the SignupPage page.
*
* See https://ionicframework.com/docs/components/#navigation for more info on
* Ionic pages and navigation.
*/
@IonicPage()
@Component({
selector: 'page-signup',
templateUrl: 'signup.html',
})
export class SignupPage {
responseData: any;
userData = {"username": "","password": "", "name": "","email": ""};
constructor(public navCtrl: NavController, public authServiceProvider: AuthServiceProvider) {
}
signUp() {
this.authServiceProvider.postData(this.userData, "signup").then((result) =>{
this.responseData = result;
console.log(this.responseData);
localStorage.setItem('userData', JSON.stringify(this.responseData));
});
}
goToLogin() {
this.navCtrl.pop();
}
}在运行这个程序时，我得到了一个未知的(承诺)：对象对象错误(可以是在这里看到的。 )
更新
我现在收到以下错误：
Object { headers: {…}, status: 404, statusText: "Not Found", url: "http://localhost/PHP-SLIM-RESTFUL/API/signup", ok: false, name: "HttpErrorResponse", message: "Http failure response for http://localhost/PHP-SLIM-RESTFUL/API/signup: 404 Not Found", error: "<html><head><title>404 Page Not Found</title><style>body{margin:0;padding:30px;font:12px/1.5 Helvetica,Arial,Verdana,sans-serif;}h1{margin:0;font-size:48px;font-weight:normal;line-height:48px;}strong{display:inline-block;width:65px;}</style></head><body><h1>404 Page Not Found</h1><p>The page you are looking for could not be found. Check the address bar to ensure your URL is spelled correctly. If all else fails, you can visit our home page at the link below.</p><a href=\"/PHP-Slim-Restful/api/\">Visit the Home Page</a></body></html>" } signup.ts:36:6回答 3
Stack Overflow用户
回答已采纳
发布于 2018-03-16 22:09:06
您可以使用类型记录的async方法使您的生活更轻松
异步中的postData方法
AuthServiceProvider:
public async postData(credentials, type): Promise<any> {
let headers = new HttpHeaders();
await this.http.post(apiUrl + type, JSON.stringify(credentials), { headers: headers }).toPromise();
}注册页面：
public async signUp(): void {
try {
// request successful
this.responseData = await this.authServiceProvider.postData(this.userData, "signup");
console.log(this.responseData);
localStorage.setItem('userData', JSON.stringify(this.responseData));
}
catch(e) {
// some error occured, handle it here..
console.log(e);
}
}不要忘记在toPromise中导入AuthServiceProvider操作符
import 'rxjs/add/operator/toPromise';Stack Overflow用户
发布于 2018-03-17 07:35:23
postData(credentials, type) {
let headers = new HttpHeaders();
return this.http.post(apiUrl + type, JSON.stringify(credentials), { headers: headers });
}这将返回可观察到的注册页面，只要订阅它。
Stack Overflow用户
发布于 2019-10-15 00:46:14
尝试在HttpModule中导入app.module.ts；
{import HttpModule } from '@angular/http'
然后将HttpModule添加到进口产品中；
imports : [BrowserModule, HttpModule, IonicModule.forRoot(MyApp) ]
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/49329963
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