Swift Firebase在tableview中检索和插入

我需要帮助检索一个子项并将其添加到tableview中。子类称为Title，是Post的子类。我已经成功地检索并打印了所有文章，但我不知道如何将标题放在我的tableview中

var posts = [postStruct]()


override func viewDidLoad() {
    super.viewDidLoad()


    let ref = FIRDatabase.database().reference().child("Posts")

    ref.observeSingleEvent(of: .value, with: { snapshot in
        print(snapshot.childrenCount)
        for rest in snapshot.children.allObjects as! [FIRDataSnapshot] {

        print(rest.value!)


                //need help here! I want to put the title which is a child of "Post"






        }


    })


}






override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return posts.count
}

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell")

    let label1 = cell?.viewWithTag(1) as! UILabel
    label1.text = posts[indexPath.row].title
    return cell!
}

}

let ref = FIRDatabase.database().reference().child("Posts")    

ref.observeSingleEvent(of: .value, with: { snapshot in

    print(snapshot.childrenCount)

    for rest in snapshot.children.allObjects as! [FIRDataSnapshot] {

        guard let value = rest.value as? Dictionary<String,Any> else { continue }

        guard let  title = value["Title"] as? String else { continue }

        let post = postStruct(title: title)

        self.posts.append(post)
    }

    self.tableView.reloadData()
})