Swift

Question

我正在将 iOS 应用程序迁移到 Swift 3，但我的 ChatViewController 上一直显示此错误消息。

2017-02-21 16:40:40.599 Jaco[52613:2864859] *** Assertion failure in -[Jaco.ChatViewController collectionView:messageDataForItemAtIndexPath:], /Users/Royal/dev/jab/ios/Pods/JSQMessagesViewController/JSQMessagesViewController/Controllers/JSQMessagesViewController.m:491
2017-02-21 16:40:40.609 Jaco[52613:2864859] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'ERROR: required method not implemented: -[JSQMessagesViewController collectionView:messageDataForItemAtIndexPath:]'

这是我的部分代码

  // DATA SOURCE 1
  func collectionView(collectionView: JSQMessagesCollectionView!,
                      messageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageData! {
    let data = self.messages[indexPath.item]
    return data
  }


  // DATA SOURCE 2
  override func collectionView(_ collectionView: UICollectionView,
                               numberOfItemsInSection section: Int) -> Int {
    return messages.count
  }

我尝试添加 "override" 但错误消息仍然存在。

有什么解决办法吗？感谢您的帮助！

Answer 1

改变

func collectionView(collectionView: JSQMessagesCollectionView

至

func collectionView(_ collectionView: JSQMessagesCollectionView

Swift - 所需方法未实现：-[JSQMessagesViewController collectionView

Swift - required method not implemented: -[JSQMessagesViewController collectionView

ios

jsqmessagesviewcontroller

swift3