要做与U盾SDK配套的密码键盘

let isPrivacyMode = true; 
try { 
  // 获取当前应用内最后显示的窗口 
  window.getLastWindow(getContext(), (err, data) => { 
    if (err.code) { 
      console.error('Failed to set the window to privacy mode. Cause:' + JSON.stringify(err)); 
      return; 
    } 
    data.setWindowPrivacyMode(isPrivacyMode, (err) => { 
      if (err.code) { 
        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.'); 
    }); 
  }) 
} catch (exception) { 
  console.error('Failed to set the window to privacy mode. Cause:' + JSON.stringify(exception)); 
}