is not working insideIonic 4

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我正在使用Ionic 4,我正试图在标题中实现一个搜索栏,如下所示:

<ion-header>
  <ion-toolbar>
    <!-- Side menu button-->
    <ion-buttons slot="start">

      <button (click)="openFirst()"><img src="../../../assets/jas.png"></button>
    </ion-buttons>

    <ion-title><ion-searchbar ></ion-searchbar></ion-title>
  </ion-toolbar>
</ion-header>

我的问题是搜索栏显示但我不能在里面写任何东西。

此外,当它不在<ion-title>内时,它不起作用。

它似乎在应用程序的每个其他位置工作

答案

尝试这样的事情如下,

<ion-header>
  <ion-toolbar>
    <ion-title>Enter Place</ion-title> 
    <ion-searchbar [(ngModel)]="autocomplete.query" [showCancelButton]="true" (ionInput)="updateSearch()" (ionCancel)="dismiss()"></ion-searchbar>
    <ion-searchbar [(ngModel)]="autocomplete.query" [showCancelButton]="true" (ionInput)="updateSearch()" (ionCancel)="dismiss()">
    </ion-searchbar>
  </ion-toolbar>
</ion-header>

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