Question

在我的角度应用程序中，我有一个主要的局部视图。母版是项目列表。通过选择一个项目，我将显示属于该项目的详细pdf文件。要查看pdf，请使用ng2-pdf-viewer。如果我在完全加载当前项目的所有pdf文件之前选择了另一个项目，则会出现以下错误：

Uncaught (in promise) Error: Worker was terminated
    at ensureNotTerminated (pdf.worker.js:sourcemap:274)
    at onFailure (pdf.worker.js:sourcemap:476)

和：

pdf_viewer.js:5606 Unable to initialize viewer Error: Transport destroyed
    at pdf.js:3448
    at ZoneDelegate.invoke (zone-evergreen.js:364)
    at Object.onInvoke (core.js:27149)
    at ZoneDelegate.invoke (zone-evergreen.js:363)
    at Zone.run (zone-evergreen.js:123)
    at zone-evergreen.js:857
    at ZoneDelegate.invokeTask (zone-evergreen.js:399)
    at Object.onInvokeTask (core.js:27137)
    at ZoneDelegate.invokeTask (zone-evergreen.js:398)
    at Zone.runTask (zone-evergreen.js:167)

ERROR Error: Uncaught (in promise): Error: Transport destroyed
Error: Transport destroyed
    at pdf.js:3448
    at ZoneDelegate.invoke (zone-evergreen.js:364)
    at Object.onInvoke (core.js:27149)
    at ZoneDelegate.invoke (zone-evergreen.js:363)
    at Zone.run (zone-evergreen.js:123)
    at zone-evergreen.js:857
    at ZoneDelegate.invokeTask (zone-evergreen.js:399)
    at Object.onInvokeTask (core.js:27137)
    at ZoneDelegate.invokeTask (zone-evergreen.js:398)
    at Zone.runTask (zone-evergreen.js:167)
    at resolvePromise (zone-evergreen.js:798)
    at resolvePromise (zone-evergreen.js:750)
    at zone-evergreen.js:860
    at ZoneDelegate.invokeTask (zone-evergreen.js:399)
    at Object.onInvokeTask (core.js:27137)
    at ZoneDelegate.invokeTask (zone-evergreen.js:398)
    at Zone.runTask (zone-evergreen.js:167)
    at drainMicroTaskQueue (zone-evergreen.js:569)
    at ZoneTask.invokeTask [as invoke] (zone-evergreen.js:484)
    at invokeTask (zone-evergreen.js:1621)

通过单击另一项，旧的细节组件将被破坏，而新的组件将被创建。对于详细视图，我实现了自己的预览器组件：

<mat-card *ngFor="let document of documentListObs | async" >
      <mat-card-content (click)="showDocument(document)" class="fill-container">
        <pdf-viewer *ngIf="isPdfSource(document)"
          [src]="!abort ? document.fileData : null"
          [original-size]="false"
          [show-all]="false"
          [page]="1"
          [autoresize]="false"
          (error)="onError($event)"
        >
        </pdf-viewer>
      </mat-card-content>
</mat-card>

documentListObs在打字稿代码中声明如下：

  @Input() public documentListObs: Observable<BmdDocument[]>;

我试图在组件的ngOnDestroy中将pdf-viewer的src属性重置为null ...没有成功：

  ngOnDestroy() {
    this.abort = true;
  }

感谢帮助！

如果加载中止，worker在ng2-pdf-viewer中终止

0 个答案: