傳送訊息

打開ChatViewController.swift，在override func didReceiveMemoryWarning() {}之後加入

    override func senderId() -> String {
        return FIRAuth.auth()?.currentUser?.uid ?? ""
    }

    override func senderDisplayName() -> String {
        return FIRAuth.auth()?.currentUser?.displayName ?? FIRAuth.auth()?.currentUser?.email ?? ""
    }

    override func didPressSend(_ button: UIButton, withMessageText text: String, senderId: String, senderDisplayName: String, date: Date) {
        // TODO: 實作傳送訊息
    }

senderId、senderDisplayName為JSQMessagesViewController必須自己實作的func，若沒有實作會在按下送出訊息時Crash

實作傳送訊息的部分

    override func didPressSend(_ button: UIButton, withMessageText text: String, senderId: String, senderDisplayName: String, date: Date) {
        // 實作傳送訊息
        let messageNode = messageRef.childByAutoId()
        let message = [
            "senderId": senderId,
            "senderDisplayName": senderDisplayName,
            "date": date.timeIntervalSince1970,
            "text": text
        ] as [String : Any];

        self.messages.append(message)

        messageNode.setValue(message) {[weak self] (error, _) in
            self?.finishSendingMessage()
        }
    }

運行APP，傳送幾個訊息並觀察Database的變化，目前Database結構如下

程式碼儲存點