PrimeNG数据表:如何在primeNg数据表中动态加载列和它们的字段？

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { DataTableModule } from 'primeng/datatable';
import { ColumnModule } from 'primeng/column';

@NgModule({
  imports: [BrowserModule, DataTableModule, ColumnModule],
  declarations: [AppComponent],
  bootstrap: [AppComponent]
})
export class AppModule { }

import { Component } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `
    <p-dataTable [value]="cars">
      <!-- 列定义 -->
      <p-column *ngFor="let col of columns" [field]="col.field" [header]="col.header"></p-column>
    </p-dataTable>
  `
})
export class AppComponent {
  cars: any[];
  columns: any[];

  constructor() {
    this.cars = [
      { brand: 'BMW', year: 2013, color: 'Black' },
      { brand: 'Audi', year: 2011, color: 'White' },
      { brand: 'Mercedes', year: 2015, color: 'Red' }
    ];
    this.columns = [
      { field: 'brand', header: 'Brand' },
      { field: 'year', header: 'Year' },
      { field: 'color', header: 'Color' }
    ];
  }
}