ios - 客户端按时间戳过滤订单文本消息
问题描述
目前它显示在左侧发送的短信,然后在右侧显示收到的短信。但是,我希望接收和发送的短信一次按时间戳排序(目前它首先按时间戳排序,然后显示发送的消息,然后按时间戳对收到的消息进行排序,然后显示收到的消息。)
override func viewDidLoad() {
super.viewDidLoad()
loadPosts()
loadPostsReceivedMessage()
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdentifier, for: indexPath) as! ChatCollectionViewCell
let senderIDNumber = Auth.auth().currentUser?.uid
//Setup the messageReceived and messageSent
if chats[indexPath.row].senderID == senderIDNumber {
if let chatsText = chats[indexPath.row].message{
let size = CGSize(width: 250, height: 1000)
let options = NSStringDrawingOptions.usesFontLeading.union(.usesLineFragmentOrigin)
let estimatedFrame = NSString(string: chatsText).boundingRect(with: size, options: options, attributes: [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 18)], context: nil)
cell.messageSend.frame = CGRect(x:8,y:0,width:estimatedFrame.width + 16, height:estimatedFrame.height + 20)
cell.textBubbleView.frame = CGRect(x:0,y:0,width:estimatedFrame.width + 16 + 8, height:estimatedFrame.height + 20)
//showOutgoingMessage(text: chats[indexPath.row].message)
}
cell.messageSend.text = chats[indexPath.row].message
}
else {
cell.messageReceived.text = chats[indexPath.row].message
let chatsText = chats[indexPath.row].message
let size = CGSize(width: 250, height: 1000)
let options = NSStringDrawingOptions.usesFontLeading.union(.usesLineFragmentOrigin)
let estimatedFrame = NSString(string: chatsText!).boundingRect(with: size, options: options, attributes: [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 18)], context: nil)
cell.messageReceived.frame = CGRect(x:view.frame.width - estimatedFrame.width - 30,y:0,width:estimatedFrame.width + 16, height:estimatedFrame.height + 20)
cell.textBubbleView.frame = CGRect(x:view.frame.width - estimatedFrame.width - 30,y:0,width:estimatedFrame.width + 16 + 4, height:estimatedFrame.height + 20)
}
return cell
}
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
if let chatsText = chats[indexPath.row].message {
let size = CGSize(width: 250, height: 1000)
let options = NSStringDrawingOptions.usesFontLeading.union(.usesLineFragmentOrigin)
let estimatedFrame = NSString(string: chatsText).boundingRect(with: size, options: options, attributes: [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 18)], context: nil)
return CGSize(width: view.frame.width, height: estimatedFrame.height + 20)
}
return CGSize(width: view.frame.width, height: 200)
}
//Get Message sent
func loadPosts() {
let senderIDNumber = Auth.auth().currentUser?.uid
let chatsRef = db.collection("chats").order(by: "timestamp", descending: false)
chatsRef.whereField("senderID", isEqualTo: senderIDNumber!).whereField("receiverID", isEqualTo: receiverIDNumber)
.addSnapshotListener { querySnapshot, error in
guard let documents = querySnapshot?.documents else {
print("Error fetching documents: \(error!)")
return
}
for document in documents {
let messageText = document.data()["message"] as? String
let senderIDNumber = document.data()["senderID"] as? String
let receiverIDNumber = document.data()["receiverID"] as? String
let timestamp = document.data()["timestamp"] as? String
guard let sender = document.data()["sender"] as? String else {return}
// let conversationsCounter = document.data()["conversationsCounter"] as? Int
guard let profileUrl = document.data()["profileUrl"] as? String else { return}
let chat = Chat(messageTextString: messageText!, senderIDNumber: senderIDNumber!, receiverIDNumber: receiverIDNumber!, timeStampString: timestamp!, profileImageUrl: profileUrl, senderString: sender)
self.chats.append(chat)
print(self.chats)
self.collectionView.reloadData()
}
}
}
//Get message received
func loadPostsReceivedMessage() {
/* let uid = Auth.auth().currentUser?.uid
let ref = Database.database().reference()
ref.child("users").child(uid!).observeSingleEvent(of: .value, with: { (snapshot) in
if let dic = snapshot.value as? [String: AnyObject]{
let currentUser = dic["username"] as? String
let senderIDNumber = Auth.auth().currentUser?.uid
} */
let chatsRef = db.collection("chats").order(by: "timestamp", descending: false)
print("thecurrentreceiver"+senderString)
print("thecurrentsender"+receiverIDNumber)
chatsRef.whereField("receiverID", isEqualTo: senderString).whereField("sender", isEqualTo: receiverIDNumber)
.addSnapshotListener { querySnapshot, error in
guard let documents = querySnapshot?.documents else {
print("Error fetching documents: \(error!)")
return
}
for document in documents {
let messageText = document.data()["message"] as? String
let senderIDNumber = document.data()["senderID"] as? String
let receiverIDNumber = document.data()["receiverID"] as? String
let timestamp = document.data()["timestamp"] as? String
// let conversationsCounter = document.data()["conversationsCounter"] as? Int
guard let profileUrl = document.data()["profileUrl"] as? String else { return}
guard let sender = document.data()["sender"] as? String else {return}
let chat = Chat(messageTextString: messageText!, senderIDNumber: senderIDNumber!, receiverIDNumber: receiverIDNumber!, timeStampString: timestamp!,profileImageUrl: profileUrl, senderString: sender)
print("whatisthemessage"+messageText!)
self.chats.append(chat)
print(self.chats)
self.collectionView.reloadData()
}
}
}
解决方案
我想你已经为这个麻烦做好了准备。你为什么不直接使用这个结构:
-chats
--chatID
---senderID
---receiverID
这样,进来的每条消息都是一个以发件人 ID 命名的文档。然后,当您想要loadPosts()
快照时,它是按时间顺序排列的,您唯一要做的就是根据发件人的身份将它们放置在右侧或左侧。
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