MessageKit在IOS:消息不显示

Question

我试图使项目尽可能简单…因为我想我确实忘记了一些东西，但我不知道是什么，我挣扎了2个小时....

你可以在屏幕上看到:视图被加载，除了消息。请在这里找到我的代码:

import UIKit
import MessageKit
struct Sender: SenderType {
var senderId: String
var displayName: String
}
struct Message: MessageType {
var sender: MessageKit.SenderType
var messageId: String
var sentDate: Date
var kind: MessageKit.MessageKind
}
class ViewController: MessagesViewController {
var messages = [Message]()
let currentUser = Sender(senderId: "myId", displayName: "Mark")

override func viewDidLoad() {
super.viewDidLoad()

messagesCollectionView.messagesDataSource = self
messagesCollectionView.messagesLayoutDelegate = self
messagesCollectionView.messagesDisplayDelegate = self

messages.append(Message(sender: currentUser, messageId: "123", sentDate: Date().addingTimeInterval(-86400) , kind: .text("Hey Vivaan, You are going to influence")))
messages.append(Message(sender: currentUser, messageId: "143", sentDate: Date().addingTimeInterval(-86405) , kind: .text("Hey Vivaan, You are going to influence")))
messages.append(Message(sender: currentUser, messageId: "153", sentDate: Date().addingTimeInterval(-86404) , kind: .text("Hey Vivaan, You are going to influence")))
messages.append(Message(sender: currentUser, messageId: "163", sentDate: Date().addingTimeInterval(-86403) , kind: .text("Hey Vivaan, You are going to influence")))
}
}

extension ViewController: MessagesDataSource {

var currentSender: MessageKit.SenderType {
return currentUser
}

func messageForItem(at indexPath: IndexPath, in messagesCollectionView: MessagesCollectionView) -> MessageType {
return messages[indexPath.section]
}

func numberOfSections(in messagesCollectionView: MessagesCollectionView) -> Int {
return messages.count
}


}
extension ViewController: MessagesDisplayDelegate, MessagesLayoutDelegate { }

我确实阅读了所有的文档，并查看了示例。我觉得还行。

谢谢你的帮助

应用图片

Answer 1

这对我有帮助

创建并粘贴这个函数到viewDidload

func loadFirstMessages() {
DispatchQueue.main.async {
self.messagesCollectionView.reloadData()
self.messagesCollectionView.scrollToLastItem(animated: false)
}
}