angular2无法解析’RequestOptions’的所有参数(?)
发布时间:2020-12-17 17:25:48 所属栏目:安全 来源:网络整理
导读:我试图将http提供程序导入到我自己的提供程序中.但它抛出了上面提到的错误. 首先,我将Http导入我的ActionTracker-Service.但后来我得到了错误 Exception No Provider for AppComponent - ActionTracker - Http 所以我也把Http导入了我的boot.ts. 的index.htm
我试图将http提供程序导入到我自己的提供程序中.但它抛出了上面提到的错误.
首先,我将Http导入我的ActionTracker-Service.但后来我得到了错误
所以我也把Http导入了我的boot.ts. 的index.html <html> <head> <title>Angular 2 QuickStart</title> <!-- 1. Load libraries --> <script src="angular2/bundles/angular2-polyfills.js"></script> <script src="systemjs/dist/system.src.js"></script> <script src="rxjs/bundles/Rx.js"></script> <script src="angular2/bundles/angular2.dev.js"></script> <script src="angular2/bundles/http.dev.js"></script> <!-- 2. Configure SystemJS --> <script> System.config({ packages: { app: { format: 'register',defaultExtension: 'js' } } }); System.import('app/boot') .then(null,console.error.bind(console)); </script> <link href="bootstrap/dist/css/bootstrap.min.css" rel="stylesheet"> <link href="font-awesome/css/font-awesome.min.css" rel="stylesheet"> <link href="assets/styles/main.css" rel="stylesheet"> </head> <!-- 3. Display the application --> <body> <my-app>Loading...</my-app> </body> </html> boot.ts import {bootstrap} from 'angular2/platform/browser' import {AppComponent} from './app.component' import {Http,ConnectionBackend,RequestOptions} from 'angular2/http' bootstrap(AppComponent,[ConnectionBackend,RequestOptions,Http]); 行动tracker.service.ts import {Injectable} from 'angular2/core'; import {Track} from './track' import {Http} from 'angular2/http' @Injectable() export class ActionTracker { constructor(private _http:Http){} } 即将发生的错误是: Cannot resolve all parameters for 'RequestOptions'(?). Make sure that all the parameters are decorated with Inject or have valid type annotations and that 'RequestOptions' is decorated with Injectable. Error: Cannot read property 'getOptional' of undefined(…) 当我仅在boots.ts文件中传递’Http’时,我收到ConnectionBackend和RequestOptions缺失的错误.所以我添加了两个,但现在我陷入了RequestOptions的错误. 任何人都可以告诉,为什么会出现这个错误?为什么我还需要将导入的Providers作为数组传递给bootstrap函数? 谢谢! (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |