无法读取系统剪贴板内容

reqPermissionsFromUser(permissions: Array<Permissions>): void { 
  let context = getContext(this) as common.UIAbilityContext; 
  let atManager = abilityAccessCtrl.createAtManager(); 
  // requestPermissionsFromUser会判断权限的授权状态来决定是否唤起弹窗 
  atManager.requestPermissionsFromUser(context, permissions).then((data) => { 
  let grantStatus: Array<number> = data.authResults; 
  let length: number = grantStatus.length; 
  for (let i = 0; i < length; i++) { 
  if (grantStatus[i] === 0) { 
  // 用户授权，可以继续访问目标操作 
  this.permission_state = true; 
  this.msgList.push('申请权限成功'); 
} 
else { 
  // 用户拒绝授权，提示用户必须授权才能访问当前页面的功能，并引导用户到系统设置中打开相应的权限 
  // openPermissionsInSystemSettings(); 
  console.error("user did not grant!") 
  this.permission_state = false; 
  this.msgList.push('申请权限失败'); 
} 
} 
// 授权成功 
}).catch((err: String) => { 
}) 
}