Swift self.tableview.reloaddata（）在抓取数据后不重新加载

所以基本上我从firebase获取数据并将其加载到我的tableview中我添加了一个快照侦听器来侦听更改，但是当更改发生时，我的tableview会重新加载任何想法为什么？idk如果我把它放错位置了

 //==============================================================================================
func grabUserPosts(){
    var userid : String!

    if Auth.auth().currentUser != nil{

        userid = Auth.auth().currentUser!.uid

    }else if(AccessToken.current != nil) {
      userid = AccessToken.current!.userID
    }

    FirebaseReferece(.quoteMe).order(by: "timestamp", descending: true).whereField(rOWNERID, isEqualTo: userid).addSnapshotListener { (snapshot, error) in
        if(error != nil){
            print(error!.localizedDescription)
        }else {

            if snapshot != nil {

                snapshot!.documentChanges.forEach({ (change) in
                    if change.type == .added {

                       // for alldocument in snapshot!.documents {

                            //let data = alldocument.data()

                            let data = change.document.data()


                            let text = data["quoteMeText"]as! String
                            let author = data["QuoteMeAuthor"] as? String

                            let PostInit = quoteME(authorID: author ?? "", quoteText: text)

                            self.userPosts.append(PostInit)





                    }
                    self.tableView.reloadData()

                })

            }

        }
    }



}

---

在主线程和循环外部调用它

DispatchQueue.main.async {
                    self.tableView.reloadData()
                }

您的函数将如下所示

func grabUserPosts(){
    var userid : String!

    if Auth.auth().currentUser != nil{

        userid = Auth.auth().currentUser!.uid

    }else if(AccessToken.current != nil) {
      userid = AccessToken.current!.userID
    }

    FirebaseReferece(.quoteMe).order(by: "timestamp", descending: true).whereField(rOWNERID, isEqualTo: userid).addSnapshotListener { (snapshot, error) in
        if(error != nil){
            print(error!.localizedDescription)
        }else {



                snapshot?.documentChanges.forEach({ (change) in
                    if change.type == .added {

                       // for alldocument in snapshot!.documents {

                            //let data = alldocument.data()

                            let data = change.document.data()


                            let text = data["quoteMeText"]as! String
                            let author = data["QuoteMeAuthor"] as? String

                            let PostInit = quoteME(authorID: author ?? "", quoteText: text)

                            self.userPosts.append(PostInit)





                    }


                })

                DispatchQueue.main.async {


                 self.tableView.reloadData()
                }



        }
    }



}

---

但请注意，这是斯威夫特！摆脱那些丑陋的客观检查。如果快照！=nil{snapshot！.documentChanges…与

snapshot？.documentChanges…

这是你在@vadian写的漂亮的一行。。。