我對(duì) Angular 很陌生。我想通過(guò)單擊按鈕在組件內(nèi)有條件地加載子組件。單擊按鈕時(shí)，它應(yīng)該重新渲染相應(yīng)的子組件。HTML代碼<div class="tab">  <button class="tablinks" (click)="onTabClick('0')">Transmit</button>  <button class="tablinks" (click)="onTabClick('1')">Published</button>  <button class="tablinks" (click)="onTabClick('2')">Bulk Transmit</button></div><div>  <app-sports  *ngIf="tabIndex === 0"></app-sports>  <app-movies  *ngIf="tabIndex === 2"></app-movies></div>TS文件tabIndex = 2 ;  onTabClick(index){        this.tabIndex = index;   }