#鸿蒙通关秘籍#如何在鸿蒙Web组件中监听页面触发的下载任务？

要在鸿蒙的Web组件中实现对下载任务的监听，可以使用setDownloadDelegate()方法来注册DownloadDelegate。然后，可以通过该代理方法监控下载进度、启动、失败以及完成等状态。下面是详细的代码实现：

bash import { webview } from '@kit.ArkWeb'; import { BusinessError } from '@kit.BasicServicesKit';

@Entry @Component struct WebComponent { controller: webview.WebviewController = new webview.WebviewController(); delegate: webview.WebDownloadDelegate = new webview.WebDownloadDelegate();

build() { Column() { Button('setDownloadDelegate') .onClick(() => { try { this.delegate.onBeforeDownload((webDownloadItem: webview.WebDownloadItem) => { webDownloadItem.start("/data/storage/el2/base/cache/web/" + webDownloadItem.getSuggestedFileName()); }) this.delegate.onDownloadUpdated((webDownloadItem: webview.WebDownloadItem) => { console.log("download update guid: " + webDownloadItem.getGuid()); }) this.delegate.onDownloadFailed((webDownloadItem: webview.WebDownloadItem) => { console.log("download failed guid: " + webDownloadItem.getGuid()); }) this.delegate.onDownloadFinish((webDownloadItem: webview.WebDownloadItem) => { console.log("download finish guid: " + webDownloadItem.getGuid()); }) this.controller.setDownloadDelegate(this.delegate); } catch (error) { console.error(ErrorCode: ${(error as BusinessError).code}, Message: ${(error as BusinessError).message}); } }) Web({ src: $rawfile('index.html'), controller: this.controller }) } } }