webview加载的网页中击input输入框，上传图片，无法拉起手机选择图片窗口，点击没有反应。

.onShowFileSelector((event) => { 
  console.log('MyFileUploader onShowFileSelector invoked') 
  const photoSelectOptions = new picker.PhotoSelectOptions(); 
  photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_VIDEO_TYPE; // 过滤选择媒体文件类型为IMAGE_VIDEO_TYPE 
  photoSelectOptions.maxSelectNumber = 2; // 选择媒体文件的最大数目 
  //let uris: Array<string> = []; 
  const photoViewPicker = new picker.PhotoViewPicker(); 
  photoViewPicker.select(photoSelectOptions).then((photoSelectResult: picker.PhotoSelectResult) => { 
    this.uris = photoSelectResult.photoUris; 
    console.info('photoViewPicker.select to file succeed and uris are:' + this.uris); 
    for (let i = 0; i < this.uris.length; i++) { 
      console.log(this.uris[i]); 
    } 
  }).catch((err: BusinessError) => { 
    console.error(`Invoke photoViewPicker.select failed, code is ${err.code}, message is ${err.message}`); 
  }) 
  return false 
})
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