如何在ng2-date-picker中打开图标点击angular？

import { Component } from '@angular/core';
import { Ng2DatePickerModule } from 'ng2-date-picker';

@Component({
  selector: 'app-date-picker',
  template: `
    <ng2-date-picker [(ngModel)]="selectedDate"></ng2-date-picker>
  `,
  styleUrls: ['./date-picker.component.css']
})
export class DatePickerComponent {
  selectedDate: Date;
}

import { Component, ViewChild } from '@angular/core';
import { Ng2DatePickerComponent } from 'ng2-date-picker';

@Component({
  selector: 'app-date-picker',
  template: `
    <i class="fa fa-calendar" (click)="openDatePicker()"></i>
    <ng2-date-picker #datePicker [(ngModel)]="selectedDate"></ng2-date-picker>
  `,
  styleUrls: ['./date-picker.component.css']
})
export class DatePickerComponent {
  selectedDate: Date;
  @ViewChild('datePicker') datePicker: Ng2DatePickerComponent;

  openDatePicker() {
    this.datePicker.toggle();
  }
}