Angular 如何在Ionic上获得ngModel值？

我试图用ngModel将输入值从html传递到ts文件。但是我犯了一个错误。这是我的代码、错误和版本

signup.html
<ion-content padding>
<ion-label color="black" stacked>Ad - Soyad</ion-label>
<ion-input type="text" id="name_surname"  [(ngModel)]="name" name='name'></ion-input>
<ion-label color="black" stacked>Kullanıcı Adı</ion-label>
<ion-input type="text" id="username" [(ngModel)]="username" name='username'></ion-input>
<ion-label color="black" stacked>Kullanıcı Mail Adresi</ion-label>
<ion-input type="email" id="email" [(ngModel)]="email" name='email'></ion-input>
<ion-label color="black" stacked>Kullanıcı Şifresi</ion-label>
<ion-input type="password" id="password" [(ngModel)]="password" name='password'></ion-input>
<ion-label color="black" stacked>Kullanıcı Şifresi - Tekrardan</ion-label>
<ion-input type="password" id="password_control" [(ngModel)]="password_control" name='password_control'></ion-input>
<ion-label color="black" stacked>Kullanıcı Tipi</ion-label>
<ion-input type="text" id="type" [(ngModel)]="type" name='type'></ion-input>
<button ion-button full (click)='signupHTTP()' id="signupButton">Giriş Yap</button>
</ion-content>

---

您必须将这些变量定义为类的属性，它们不能无中生有

export class SignupPage {
  name: string = 'initialName';
  username: string = 'initialUserName';
  ...

---

您在哪里声明了

ngModel

变量？

export class SignupPage {
  name: string = 'initialName';
  username: string = 'initialUserName';
  ...