我有一个简单的 Angular 6 应用程序,它有关注和取消关注按钮,正如你现在看到的,当你点击关注数量增加时,我想将这些关注者数量保存到 json 服务器。
这是 json 服务器文档的链接:https ://www.npmjs.com/package/json-server
这是我正在尝试做的演示: 这里的演示是我的 json 文件
"data": [
{
"id": 1,
"following": 121,
"followers": 723,
}
],
这是html
<div class="container">
<div class="row">
<p class="col">{{numberOffollowers}}</p>
<button class="col btn btn-success" (click)="followButtonClick()">Follow</button>
<button class="col btn btn-danger" (click)="unfollowButtonClick()">Unfollow</button>
</div>
</div>
这里是服务
import { Injectable } from '@angular/core';
import { Statuses} from '../model/statuses';
import { HttpClient } from '@angular/common/http';
@Injectable()
export class UsersService {
status: Statuses[];
constructor(private http: HttpClient) { }
statusUrl = 'http://localhost:3000/statuses';
getStatuses() {
return this.http.get<Statuses[]>(this.statusUrl);
}
addStatus(status: Statuses) {
return this.http.patch(this.statusUrl, status);
}
}
这是 ts 文件:
import { Component, Input } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { UsersService } from './service/users.service';
import { Statuses} from './model/statuses';
@Component({
selector: 'like-box',
templateUrl: 'like.component.html',
styleUrls: [ './like.component.css' ]
})
export class LikeComponent {
numberOffollowers : number = 69;
status: Statuses[];
constructor(private http: HttpClient, private usersService: UsersService) { }
followButtonClick() {
this.numberOffollowers++;
}
unfollowButtonClick() {
this.numberOffollowers--;
}
addStatus() {
this.usersService.addStatus(this.numberOffollowers)
.subscribe(data => {
this.status.push(this.numberOffollowers);
});
}
}
通过此链接应用程序访问我的应用程序
您可以看到它不起作用,我需要在我的应用程序中进行哪些更改才能将这些关注者编号保存到 json 服务器?