Question

我有一个班级：

export class Party {
  constructor ( public title: string,
            public lan1: number,
            public lan2: number ) { }
}

我有服务：

import { Party } from '../classes/party';

export class PartyService {

 parties: Party[] = [];

  addData(title: string, lan1: number, lan2: number) {
    this.parties.push(new Party(title, lan1, lan2));
  }

  getData(): Party[] {
    return this.parties;
   }

}

我有一个组件：

export class AppComponent implements OnInit {
parties: Party[] = [];

title = 'app';

party_location: Location[] =  [
  { lat: 123, lng: 23 }
];

constructor(private partyService: PartyService){}

ngOnInit() {

  this.parties = this.partyService.getData();
 }

}

我想将party属性添加到party_location，如下所示：

for（let this in this.parties）{ this.party_location.push（new Location（item.lan1，item.lan2））; }

但我不能，因为打字稿没有在item中看到lan1 lan2属性。我怎么能这样做？

Answer 1

您需要使用for..of来迭代数组。 for..in迭代对象的属性，for..of迭代数组元素：

for (let item of this.parties) { 
   this.party_location.push(new Location(item.lan1, item.lan2)); 
}

将数组添加到array - typescript中

1 个答案: