懒惰var未在containerView Swift 3中初始化 - Xcode 8

Question

所以我在我的消息传递应用程序中为UIView提供了这个懒惰的var。 View包含一个文本字段和2个按钮。我们称之为 inputView 。 inputView 已经以编程方式创建，每当我通过以下方式呈现它时：present(chatLogController, animated: true)它按预期工作。这是一张向您展示的图片：

但是，每当我将ChatLogVC放在容器视图中并通过嵌入式segue与Interface Builder呈现时，视图永远不会显示。这是一张图片

注意：我使用containerView的原因是顶部有标题栏。

为什么嵌入的segue会阻止变量被执行？

这是我的代码

介绍VC：

 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {


        **MARK: Performs the function below
        self.showChatControllerForUser(user)

        **MARK:  Performs segue to VC which then performs the embed segue
        self.performSegue(withIdentifier: "toChatLog", sender: nil)

}

 **MARK: This function shows successfully the inputView
func showChatControllerForUser(_ user: messageUser) {
    let chatLogController = ChatLogController(collectionViewLayout: UICollectionViewFlowLayout())
    chatLogController.user = user
    present(chatLogController, animated: true)
    //navigationController?.pushViewController(chatLogController, animated: true)
}

ChatLogVC：

override func viewDidLoad() {
    super.viewDidLoad()

    collectionView?.collectionViewLayout = UICollectionViewFlowLayout()
    user = segueUser
    observeMessages()
    print("CHAT LOG IS RUNNING")
    collectionView?.showsVerticalScrollIndicator = false
    collectionView?.contentInset = UIEdgeInsets(top: 8, left: 0, bottom: 8, right: 0)
    //        collectionView?.scrollIndicatorInsets = UIEdgeInsets(top: 0, left: 0, bottom: 50, right: 0)
    collectionView?.alwaysBounceVertical = true
    collectionView?.backgroundColor = UIColor.white
    collectionView?.register(ChatMessageCell.self, forCellWithReuseIdentifier: cellId)

    collectionView?.keyboardDismissMode = .interactive
    //(inputContainerView)
    collectionView?.bringSubview(toFront: inputContainerView)



}



lazy var inputContainerView: ChatInputContainerView = {
    let chatInputContainerView = ChatInputContainerView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: 64))
    chatInputContainerView.chatLogController = self
    return chatInputContainerView
}()

InputView：

我遗漏了所有的UI代码

class ChatInputContainerView: UIView, UITextFieldDelegate {

 weak var chatLogController: ChatLogController? {
    didSet {
        sendButton.addTarget(chatLogController, action: #selector(ChatLogController.handleSend), for: .touchUpInside)
        uploadImageView.addGestureRecognizer(UITapGestureRecognizer(target: chatLogController, action: #selector(ChatLogController.handleUploadTap)))
    }
}
 func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    chatLogController?.handleSend()
    return true
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

}

我的问题是：当ChatLog通过segue呈现时，为什么不执行inputView？