如何在离子无线电元件上使用 ngModel?

2022-01-13 00:00:00 javascript ionic-framework angular ecmascript-6 ionic2

我正在尝试在 ion-radio 元素上实现 ngModel，但不知何故它不起作用.这是我的代码:

I'm trying to implement a ngModel on a ion-radio element but somehow it doesn't work. This is my code:

import {
  Page
} from 'ionic-angular';

@Page({
  templateUrl: 'build/pages/settings/settings.html'
})

export class Settings {
  constructor() {
    this.unit = 2;
  }
}

<ion-list radio-group>
  <ion-list-header>
    Unit
  </ion-list-header>

  <ion-item>
    <ion-label>Metric (kg)</ion-label>
    <ion-radio value="1" [(ngModel)]="unit"></ion-radio>
  </ion-item>

  <ion-item>
    <ion-label>Imperial (lbs)</ion-label>
    <ion-radio value="2" [(ngModel)]="unit"></ion-radio>
  </ion-item>
</ion-list>

我尝试在离子输入和离子选择上实现它，效果很好.我还尝试将 directives: [FORM_DIRECTIVES] 添加到我的 @Page 并添加相应的导入，但这并不能解决问题.

I've tried implementing it on a ion-input and ion-select and that just works fine. I also tried adding directives: [FORM_DIRECTIVES] to my @Page and added the corresponding import but that doesn't fix the problem.

有什么想法吗?

推荐答案

语法已经改写，ngModel 应该放在 ion-list &radio-group 只有一次.无需将它们放在每个 ion-radio 元素上.

Syntax has been changed rewritten now, ngModel should be place with ion-list & radio-group only once. No need to have them there on each ion-radio element.

<ion-list radio-group [(ngModel)]="unit">
    <ion-list-header>
        Unit
    </ion-list-header>

    <ion-item>
        <ion-label>Metric (kg)</ion-label>
        <ion-radio value="1"></ion-radio>
    </ion-item>

    <ion-item>
        <ion-label>Imperial (lbs)</ion-label>
        <ion-radio value="2" ></ion-radio>
    </ion-item>
</ion-list>

有关更多信息，您可以访问 ionic2 框架论坛链接

For more information you could visit ionic2 framework forum link

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