鸿蒙开发中如何设置禁止截屏录屏？

使用 MainWindow的 setWindowPrivacyMode(true)方法.

具体来说, 在 EntryAbility的 onWindowStageCreate(windowStage: window.WindowStage) 方法中可以获取到 MainWindow:

windowStage.getMainWindow((err, windowClass: window.Window) => {
  this.mainWindow = windowClass;
});

然后通过 MainWindow设置进入隐私模式, 实现禁止截屏和录屏.

/**
         * Sets whether is private mode or not.
         *
         * @permission ohos.permission.PRIVACY_WINDOW
         * @param { boolean } isPrivacyMode in private mode if true, or not if false.
         * @returns { Promise<void> } Promise that returns no value.
         * @throws { BusinessError } 201 - Permission verification failed. The application does not have the permission required to call the API.
         * @throws { BusinessError } 401 - Parameter error. Possible cause: 1. Mandatory parameters are left unspecified;
         *                                                                  2. Incorrect parameter types.
         * @throws { BusinessError } 1300002 - This window state is abnormal.
         * @syscap SystemCapability.WindowManager.WindowManager.Core
         * @atomicservice
         * @since 12
         */
        setWindowPrivacyMode(isPrivacyMode: boolean): Promise<void>;