Angular2 -如何知道在Angular2应用程序中选择了哪个单选按钮

<form [formGroup]="radioForm">
  <div *ngFor="let option of options; let i = index">
    <input type="radio" [value]="option.value" formControlName="selectedOption" (change)="onRadioChange($event)">
    <label>{{ option.label }}</label>
  </div>
</form>

import { Component } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-radio-buttons',
  templateUrl: './radio-buttons.component.html',
  styleUrls: ['./radio-buttons.component.css']
})
export class RadioButtonsComponent {
  radioForm: FormGroup;
  options = [
    { label: 'Option 1', value: '1' },
    { label: 'Option 2', value: '2' },
    { label: 'Option 3', value: '3' }
  ];

  constructor(private fb: FormBuilder) {
    this.radioForm = this.fb.group({
      selectedOption: ''
    });
  }

  onRadioChange(event: any) {
    console.log('Selected value:', event.target.value);
  }
}