我正在嘗試創建一個聊天應用程序。我有登錄和聊天界面的一部分完成,但是當我嘗試使用函數collectionView(collectionView: JSQMessagesCollectionView!, messageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageData
配置聊天時,它給了我錯誤'無法將類型[JSQMessage]的返回表達式轉換爲鍵入JSQMessageData!'Swift 2.2,Firebase,JSQMessagesViewController - 無法將[JSQMessage]類型的返回表達式轉換爲JSQMessageData類型
這裏是我的MessagesViewController代碼:
import UIKit
import JSQMessagesViewController
import Firebase
class MessagesViewController: JSQMessagesViewController {
override func collectionView(collectionView: JSQMessagesCollectionView!,
messageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageData! {
return message[indexPath.item].userMessages
}
override func collectionView(collectionView: UICollectionView,
numberOfItemsInSection section: Int) -> Int {
return message.count
}
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.hidesBackButton = false
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
這裏是我的自定義類消息的代碼:
import Foundation
import JSQMessagesViewController
import Firebase
class Messages {
dynamic var user = FIRAuth.auth()?.currentUser?.uid
dynamic var addedUsers = [String]()
dynamic var userMessages = [JSQMessage]()
dynamic var messageDates = [NSDate]()
}
數組的消息是var message = [Messages]()
什麼是我的錯誤,先謝謝你。
我認爲應該是它應該返回消息[indexPath.item] –