ionic2中的阿拉伯语和英文字符表单验证

<ion-item>
  <ion-label>姓名</ion-label>
  <ion-input [(ngModel)]="name" name="name" required></ion-input>
</ion-item>
<ion-item *ngIf="name.invalid && (name.dirty || name.touched)">
  <ion-label color="danger" stacked>姓名不能为空</ion-label>
</ion-item>

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

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  name: FormControl;

  constructor(private formBuilder: FormBuilder) {
    this.name = this.formBuilder.control('', Validators.required);
  }
}