testapp/src/app/tab4/user/login/login.page.html

<ion-header [translucent]="true">
  <ion-toolbar>
    <ion-title>登录/注册</ion-title>
  </ion-toolbar>
</ion-header>

<ion-content [fullscreen]="true">

  <ion-card>
    <ion-card-header>
      <ion-card-title>登录/注册</ion-card-title>
    </ion-card-header>
  
    <ion-card-content>

      <ion-list [inset]="true">
        <ion-item>
          <ion-input [(ngModel)]="username" label="账号" placeholder="请输入用户名"></ion-input>
        </ion-item>
        <ion-item>
          <ion-input [(ngModel)]="password" label="密码" type="password" placeholder="请输入密码"></ion-input>
        </ion-item>
      </ion-list>
     
    </ion-card-content>
  
    <ion-button (click)="login()" fill="clear">登录</ion-button>
    <ion-button (click)="register()" fill="clear">注册</ion-button>
  </ion-card>

  <!-- 新增路由返回逻辑，执行back函数 -->
  <ion-button expand="block" (click)="back()">返回</ion-button>
</ion-content>