HarmonyOS 在什么阶段设置web的useragent

设置useragent可以在web的onControllerAttached中进行设置

import web_webview from '@ohos.web.webview';

@Entry
@Component
struct VideoDemo {
  controller: web_webview.WebviewController = new web_webview.WebviewController();

  build() {
    Column() {
      Web({ src: $rawfile('web.html'),controller:this.controller })
        .onControllerAttached(()=>{
          let userAgent = this.controller.getUserAgent();
          this.controller.setCustomUserAgent(userAgent);
        })

    }
  }
}