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我正在学习 SwiftUI。我遇到了一个问题。我试图更新数组的值，但它没有更新。还请指导我如何创建对象数组并更新用户界面。还更新 ui 并且数组中的任何对象都得到更新。

我正在使用的当前代码如下：

@State var unsafeInboxList: [Inbox] = []

 private func observeNewChatMessage(userId: String){
        let inboxRef = databaseReference.child(DatabaseNode.Root.inbox.rawValue)
            .child(userId)
         inboxRef.observe(.childAdded, with: { (snapshot) in

            guard let value = snapshot.value else { return }
            var inbox = Inbox(with: JSON(value))
            self.addNew(inboxItem: inbox)

            inbox.roomType = .single
            self.observeRoomDetails(inbox: inbox)
           self.getBlockLeaveLastMessage(roomId: inbox.roomId, completion: { (lastMessage) in

               if let lastMessage = lastMessage{
                   self.update(lastMessage: lastMessage, inbox: inbox)
               }else{
                   self.setLastMessageObserver(inbox: inbox)
               }
           })

        })
    }

private let inboxQueue = DispatchQueue(label: "InboxQueue", attributes: .concurrent)
    private func addNew(inboxItem inbox: Inbox){

        inboxQueue.async(flags: .barrier) {


            if let index = self.unsafeInboxList.firstIndex(of: inbox){
                _ = self.unsafeInboxList[index]
                var nInbox = inbox
                nInbox.chatMember = self.unsafeInboxList[index].chatMember
                nInbox.chatRoom = self.unsafeInboxList[index].chatRoom
                //nInbox.unreadCount = self.unsafeInboxList[index].unreadCount
                self.unsafeInboxList[index] = nInbox
            }else{
                self.unsafeInboxList.append(inbox)
            }
            self.sortListing()

        }
    }

private func observeRoomDetails(inbox: Inbox){

        let roomRef = databaseReference.child(DatabaseNode.Root.roomInfo.rawValue).child(inbox.roomId)
         roomRef.observe(.value, with: { (snapshot) in


            if let value = snapshot.value{
                let chatRoom = ChatRoom(with: JSON(value))
                self.update(inboxItem: inbox, chatRoom: chatRoom)
            }
        })
    }

在这里，当我尝试使用新聊天室更新对象时，值没有更新，并且我正在获取以前的收件箱对象。

 private func update(inboxItem inbox: Inbox, chatRoom: ChatRoom){
        inboxQueue.async(flags: .barrier) {

            if let index = self.unsafeInboxList.firstIndex(of: inbox){
                self.unsafeInboxList[index].chatRoom = chatRoom
                // chatroom updated
            }
            self.sortListing()

        }
    }
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