angular - ionic 2 ngFor ionic 选项抛出错误

Question

我在模板中有简单的 ionic 选择

<ion-select class="pull-right" [(ngModel)]="selectedLanguage">
  <ion-option *ngFor="lang of languages" [value]="lang.name">{{lang.name}}</ion-option>
</ion-select>

但是它的抛出错误:

Unhandled Promise rejection: Template parse errors: Can't bind to 'ngFor' since it isn't a known property of 'ion-option'. 1. If 'ion-option' is an Angular component and it has 'ngFor' input, then verify that it is part of this module. 2. If 'ion-option' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schemas' of this component to suppress this message. ("0>

有人知道代码有什么问题吗？

Answer 1

let 关键字如下图所示，

*ngFor="let lang of languages"