角度接口即将出现未定义

Question

我的控件中有一个接口，我用它实例化了：

共享：IShared;

我导入的内容：

从'./../../接口/ i-shared';

导入{IShared}

这是我的界面代码：

import { IAddress } from './i-address';
import { IEmail } from "./i-email";
import { IPhone } from "./i-phone";
import { IBusiness } from './i-business';

export interface IShared {
        owner_id:string;
        card_color:string;
        card_name:string;
        card_type:string;
        card_subtitle:string;
        company:string;
        title:string;
        linkedin:string;
        linkedin_bus:string;
        facebook:string;
        google:string;
        twitter:string;
        pinterest:string;
        emails: IEmail[];
        phones: IPhone[];
        addresses: IAddress[];
        businesses: IBusiness[];

} 

但是，当我尝试将某些东西推到'this.shared.phones'时，我收到错误：

ERROR TypeError: Cannot read property 'phones' of undefined

我在这里做错了什么？