在角度控制器中迭代嵌套的json数组，获得唯一值并在视图html页面中显示。

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent {
  uniqueValues: any[];

  constructor(private http: HttpClient) {
    this.loadJSONData();
  }

  loadJSONData() {
    this.http.get('path/to/json').subscribe((data: any[]) => {
      this.uniqueValues = this.getUniqueValues(data);
    });
  }

  getUniqueValues(data: any[]): any[] {
    const uniqueValues = [];
    const visited = {};

    function iterateArray(arr: any[]) {
      arr.forEach((item) => {
        if (Array.isArray(item)) {
          iterateArray(item);
        } else {
          const key = JSON.stringify(item);
          if (!visited[key]) {
            visited[key] = true;
            uniqueValues.push(item);
          }
        }
      });
    }

    iterateArray(data);
    return uniqueValues;
  }
}

<div *ngFor="let value of uniqueValues">
  {{ value }}
</div>