android - 获取正确的联系人计数，但在 Ionic 4 中获取联系人的空值

Answer 1

像这样解决它：

import { Contacts } from '@ionic-native/contacts/ngx';

declare var navigator: any;

@Component({
  selector: 'assignment',
  templateUrl: './assignment.page.html',
  styleUrls: ['./assignment.page.scss']
})

async getContacts() {
 await document.addEventListener("deviceready", () => {

  navigator.contacts.find(
    [navigator.contacts.fieldType.displayName],
    gotContacts,
    errorHandler);

    function errorHandler(e) {
      console.log("errorHandler: "+e);
    }

    function gotContacts(deviceContacts) {
    console.log("gotContacts, number of results " + deviceContacts.length);
      for(var i=0, len = deviceContacts.length; i<len; i++) {
            console.log("Contact >>>  ", deviceContacts[i]);
       }
    }
  }
}