ios - JSQMessages ViewController 聊天而不在数据库中创建任何 child
<p><p>我在 <code>Viewcontroller</code> 中使用了 <code>JSQMessagesViewController</code>。聊天以匿名用户打开。聊天工作正常，但我需要对数据库进行一些更改。因为数据库是它的火力基地。当任何消息进入它显示的数据库时，我正在我的数据库中创建一个 child ，首先它显示名为“消息”的 child ，并在消息下显示所有聊天消息，我想删除这个 child ，直接聊天应该在它进入数据库时显示，并且还应该直接接收所有消息，而不会干扰数据库中的任何子项。我的聊天代码是这样的，</p>
<pre><code>import UIKit
import Firebase
import FirebaseDatabase
@objc class ChatViewViewController: JSQMessagesViewController, UINavigationControllerDelegate{
var ref: DatabaseReference!
var Name : String?
private var messages = ()
lazy var messageRef = Database.database().reference().child("Message")
var newMessageRefHandle: DatabaseHandle?
lazy var outgoingBubbleImageView: JSQMessagesBubbleImage = self.setupOutgoingBubble()
lazy var incomingBubbleImageView: JSQMessagesBubbleImage = self.setupIncomingBubble()
private var updatedMessageRefHandle: DatabaseHandle?
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Chat Room"
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(addTapped))
self.ref = Database.database().reference(fromURL: "Database URL")
guard let str = UserDefaults.standard.string(forKey: "name") else {
return
}
senderDisplayName = str
self.senderId = Auth.auth().currentUser?.uid as NSString?! as String!
collectionView!.collectionViewLayout.incomingAvatarViewSize = CGSize.zero
collectionView!.collectionViewLayout.outgoingAvatarViewSize = CGSize.zero
observeMessages()
// Do any additional setup after loading the view.
}
</code></pre>
<p>发送按钮代码是这个，</p>
<pre><code> override func didPressSend(_ button: UIButton!, withMessageText text: String!, senderId: String!, senderDisplayName: String!, date: Date!) {
let itemRef = messageRef.childByAutoId()
let messageItem = [
"senderId": senderId!,
"senderName": senderDisplayName!,
"text": text!,
]
itemRef.setValue(messageItem)
JSQSystemSoundPlayer.jsq_playMessageSentSound()
collectionView.reloadData()
finishSendingMessage()
}
</code></pre>
<p>在 UI 中显示消息是这样的，</p>
<pre><code> private func observeMessages() {
//messageRef = channelRef!.child("messages")
// 1.
let messageQuery = messageRef.queryLimited(toLast:25)
// 2. We can use the observe method to listen for new
// messages being written to the Firebase DB
newMessageRefHandle = messageQuery.observe(.childAdded, with: { (snapshot) -> Void in
// 3
let messageData = snapshot.value as! Dictionary<String, String>
if let id = messageData["senderId"] as String!, let name = messageData["senderName"] as String!, let text = messageData["text"] as String!, text.characters.count > 0 {
// 4
self.addMessage(withId: id, name: name, text: text)
// 5
self.finishReceivingMessage()
}
})
updatedMessageRefHandle = messageRef.observe(.childChanged, with: { (snapshot) in
})
}
</code></pre>
<p>这就是我的数据库的外观
<a href="/image/5AA1b.png" rel="noreferrer noopener nofollow"><img src="/image/5AA1b.png" alt="enter image description here"/></a> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>我不知道我是否完全理解您的问题，但据我所知，您正试图从数据库中删除 <code>Message</code> 层。您应该可以通过更改文件顶部的这一行来完成此操作</p>
<p><code>lazy var messageRef = Database.database().reference().child("Message")</code> to ->
<code>lazy var messageRef = Database.database().reference()</code> </p>
<p>这将删除该层。如果这不是您所描述的问题，请告诉我。
页:
[1]