ngIf取决于Angular 4中的数字绑定图像

Question

 <td *ngFor="let user of userService.users | async">
 <div *ngIf="user?.data.apps.details[0].acknowledged as fooIcon">
 <img *ngIf="fooIcon === "1" " src="./app/img/icones_sized/tick.png"/>
 <img *ngIf="fooIcon === "0" " src="nothing_appears"/>
 </div> 

如果我的“.acknowledged”返回“1”，我试图显示图像，如果返回“0”，则不应显示任何内容......它适用于字符串但不带数字..我不是真的明白为什么..

Answer 1

您应该使用 *ngIf...else 作为

    <ng-template #loading>
        <img src="./app/img/icones_sized/stable_arrow_small.png"/>
    </ng-template>
    <div *ngIf="user?.data.apps.details[0].acknowledged===1;else loading;">
      <img src="./app/img/icones_sized/tick.png"/>
    </div>