HarmonyOS 如何申请禁止截屏的权限呢

可以在module.json5文件中添加

ohos.permission.PRIVACY_WINDOW，代码如下

"requestPermissions": [
{
  "name": "ohos.permission.PRIVACY_WINDOW"
}
]

添加权限后实现代码逻辑可以参看如下setWindowPrivacyMode api

https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-window-V5

对所有应用开放(所有应用可直接使用的权限不需要特别是申请):

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/permissions-for-all-V5

PRIVACY_WINDOW不需要去申请跨级别权限 ，ACL也是true。实现代码如下：

在onWindowStageCreate设置

// 1.获取应用主窗口。
let windowClass: window.Window | null = null;
windowStage.getMainWindow((err: BusinessError, data) => {
  let errCode: number = err.code;
  if (errCode) {
    console.error('Failed to obtain the main window. Cause: ' + JSON.stringify(err));
    return;
  }
  windowClass = data;
  console.info('Succeeded in obtaining the main window. Data: ' + JSON.stringify(data));
  // 2.设置主窗口属性。
  let isPrivacyMode: boolean = true;
  windowClass.setWindowPrivacyMode(isPrivacyMode, (err: BusinessError) => {
    const errCode: number = err.code;
    if (errCode) {
      console.error('Failed to set the window to privacy mode. Cause:' + JSON.stringify(err));
      return;
    }
    console.info('Succeeded in setting the window to privacy mode.');
  });
})