设置禁止截屏的隐私模式

import { BusinessError } from '@ohos.base'; 
import window from '@ohos.window'; 
@Entry 
@Component 
struct Index { 
  @State message: string = 'Hello World'; 
  build() { 
    Row() { 
      Column() { 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
        Button() { 
          Text("开启隐藏") 
        } 
        .width(80) 
        .height(60) 
        .onClick(() => { 
          let isPrivacyMode: boolean = true; 
          try { 
            window.getLastWindow(getContext(), (err: BusinessError, data) => { 
              const errCode = err.code; 
              if (errCode) { 
                return; 
              } 
              let promise = data.setWindowPrivacyMode(isPrivacyMode); 
              promise.then(() => { 
                this.message = "隐私模式"; 
                console.info('已成功将窗口设置为隐私模式.'); 
              }).catch((err: BusinessError) => { 
                console.error('Failed to set the window to privacy mode. Cause: ' + JSON.stringify(err)); 
              }); 
            }) 
          } catch (exception) { 
            console.error('Failed to set the window to privacy mode. Cause:' + JSON.stringify(exception)); 
          } 
        }) 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
        Button() { 
          Text("关闭隐藏") 
        } 
        .width(80) 
        .height(60) 
        .onClick(() => { 
 
          let isPrivacyMode: boolean = false; 
          try { 
            window.getLastWindow(getContext(), (err: BusinessError, data) => { 
              const errCode = err.code; 
              if (errCode) { 
                return; 
              } 
              let promise = data.setWindowPrivacyMode(isPrivacyMode); 
              promise.then(() => { 
                this.message = "已关闭"; 
                console.info('已成功关闭将窗口设置为隐私模式.'); 
              }).catch((err: BusinessError) => { 
                console.error('Failed to set the window to privacy mode. Cause: ' + JSON.stringify(err)); 
              }); 
            }) 
          } catch (exception) { 
            console.error('Failed to set the window to privacy mode. Cause:' + JSON.stringify(exception)); 
          } 
        }) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}