Can't implement required methods of JSQMessagesViewController Swift 3

Question

I'm trying to use JSQMessagesVC in my Swift 3 project. It was installed via cocoa pods and everything looks fine. The problem is I can't implement collectionView methods and a keep getting errors. Can anyone help me?

import UIKit
import JSQMessagesViewController

class ChatViewController: JSQMessagesViewController {

    var messages = [JSQMessage]()

    override func viewDidLoad() {
        super.viewDidLoad()
        collectionView!.delegate = self
        collectionView!.dataSource = self

        collectionView!.collectionViewLayout.incomingAvatarViewSize = CGSize.zero
        collectionView!.collectionViewLayout.outgoingAvatarViewSize = CGSize.zero

    }

    override func collectionView(_ collectionView: JSQMessagesCollectionView, messageDataForItemAt indexPath: IndexPath) -> JSQMessageData {
        return messages[indexPath.item]
    }

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

    override func collectionView(_ collectionView: JSQMessagesCollectionView!, messageBubbleImageDataForItemAt indexPath: IndexPath!) -> JSQMessageBubbleImageDataSource! {
        let message = messages[indexPath.item] // 1
        if message.senderId == senderId { // 2
            return outgoingBubbleImageView
        } else { // 3
            return incomingBubbleImageView
        }
    }

    override func collectionView(_ collectionView: JSQMessagesCollectionView!, avatarImageDataForItemAt indexPath: IndexPath!) -> JSQMessageAvatarImageDataSource! {
        return nil
    }


    lazy var outgoingBubbleImageView: JSQMessagesBubbleImage = self.setupOutgoingBubble()
    lazy var incomingBubbleImageView: JSQMessagesBubbleImage = self.setupIncomingBubble()

    private func setupOutgoingBubble() -> JSQMessagesBubbleImage {
        let bubbleImageFactory = JSQMessagesBubbleImageFactory()
        return bubbleImageFactory!.outgoingMessagesBubbleImage(with: UIColor.jsq_messageBubbleBlue())
    }

    private func setupIncomingBubble() -> JSQMessagesBubbleImage {
        let bubbleImageFactory = JSQMessagesBubbleImageFactory()
        return bubbleImageFactory!.incomingMessagesBubbleImage(with: UIColor.jsq_messageBubbleLightGray())
    }




//    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
//        //Your Logic here
//    }

}

Answer 1

I was using a script to detect some tags (TODO, FIXME and ERROR) during compilation. So, I had a combination of wrong method signatures and script wrong detection.

TAGS="TODO:|FIXME:" ERRORTAG="ERROR:" find "${SRCROOT}" ( -name ".h" -or -name ".m" -or -name ".swift" ) -print0 | xargs -0 egrep --with-filename --line-number --only-matching "($TAGS).\$|($ERRORTAG).*\$" | perl -p -e "s/($TAGS)/ warning: \$1/" | perl -p -e "s/($ERRORTAG)/ error: \$1/"