我正在尝试创建一个聊天应用程序。我有登录和聊天界面的一部分完成,但是当我尝试使用函数collectionView(collectionView: JSQMessagesCollectionView!, messageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageData
配置聊天时,它给了我错误'无法将类型[JSQMessage]的返回表达式转换为键入JSQMessageData!'Swift 2.2,Firebase,JSQMessagesViewController - 无法将[JSQMessage]类型的返回表达式转换为JSQMessageData类型
这里是我的MessagesViewController代码:
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.
}
*/
}
这里是我的自定义类消息的代码:
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]()
}
数组的消息是var message = [Messages]()
什么是我的错误,先谢谢你。
我认为应该是它应该返回消息[indexPath.item] –