HarmonyOS 防截屏

参考以下步骤和demo：

1、在module.json5文件中声明需要使用的 ohos.permission.PRIVACY_WINDOW 权限，参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/declare-permissions-V5

"requestPermissions": [
  {
    "name": "ohos.permission.PRIVACY_WINDOW"
  }
]
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2.示例代码

// windowUtils.ets

import window from '@ohos.window';
import common from '@ohos.app.ability.common';
export class windowUtils {
  static setWindowPrivacyModeInPage(context: common.UIAbilityContext,isFlag: boolean) {
    window.getLastWindow(context).then((lastWindow)=>{
      lastWindow.setWindowPrivacyMode(isFlag);
    })
  }
}
//页面
import common from '@ohos.app.ability.common';
import { windowUtils } from '../common/windowUtils';
@Entry
@Component
struct Index3 {
  @State message: string = 'Hello World';
  onPageShow(): void {
    windowUtils.setWindowPrivacyModeInPage(getContext(this) as common.UIAbilityContext, true);
  }
  onPageHide() {
    windowUtils.setWindowPrivacyModeInPage(getContext(this) as common.UIAbilityContext,false);
  }
  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
      }
      .width('100%')
    }
    .height('100%')
  }
}
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