更改pfobject上的acl不会持续到分析服务器上

当我将更改保存到 ACL 在一 PFObject (在本例中,使其可公开写入),完成块成功运行,但更改实际上没有保存到服务器。重新获取对象或通过分析仪表板查看对象,会显示 国际计算语言学协会 更改不持久。事实上,我已经通过服务器日志验证了解析服务器从未收到请求。

// first fetch an object from the parse server, then...
print("before: \(object.acl?.hasPublicWriteAccess)") // "false"
object.acl?.hasPublicWriteAccess = true
object.saveInBackground { (success, error) in
    // confirm that success is true and error is nil
    print("after: \(object.acl?.hasPublicWriteAccess)") // "true" - object is updated client-side

    // now, re-fetch the same object or check it in Parse Dashboard. It is not saved as publicly editable.
}