如何在Ionic 3中将令牌添加到报头？

import { HttpClientModule } from '@angular/common/http';

@NgModule({
  ...
  imports: [
    ...
    HttpClientModule
  ],
  ...
})
export class AppModule { }

import { HttpClient, HttpHeaders } from '@angular/common/http';

constructor(private http: HttpClient) { }

sendRequestWithToken() {
  const url = 'https://example.com/api/endpoint';
  const token = 'your_token_value';

  // 创建报头对象并添加令牌
  const headers = new HttpHeaders().set('Authorization', `Bearer ${token}`);

  // 发送HTTP GET请求并添加报头
  this.http.get(url, { headers }).subscribe(
    (response) => {
      // 处理响应
    },
    (error) => {
      // 处理错误
    }
  );
}