Ios 实时应用程序崩溃，EXC\u错误\u访问内核\u无效\u地址

我的live应用程序随机崩溃，无法复制。下面是代码。由于崩溃发生在第20行，这是一个出口，它似乎有一些错误与我的自定义文本字段。我想不出哪里出了问题。有什么帮助吗

Crashlytics日志

崩溃：com.apple.main-threadexc\u坏访问内核\u无效\u地址 0x00000002d37a1db0

代码

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    tableView.deselectRow(at: indexPath, animated: true)

    let menu = menuItems[indexPath.row]
    let menuTitle = menu.menuTitle

    switch menuTitle{

    case "My Profile":
        performSegue(withIdentifier: "myProfileSegue", sender: cell)
    //....
    }
}

class ProfileViewController: UIViewController {
    // ..
    @IBOutlet weak var emailTextField: CustomTextField! // Line no. 20
}

class CustomTextField: UITextField {

    var bottomBorder = UIView()

    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        self.initialize()

        self.translatesAutoresizingMaskIntoConstraints = false

        bottomBorder = UIView.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
        bottomBorder.backgroundColor = .lightGreyColour
        bottomBorder.translatesAutoresizingMaskIntoConstraints = false

        addSubview(bottomBorder)

        bottomBorder.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        bottomBorder.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
        bottomBorder.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
        bottomBorder.heightAnchor.constraint(equalToConstant: 1).isActive = true
    }

    func initialize() {
        let clearButton = UIButton(frame: CGRect(x: 0, y: 0, width: 16, height: 16))
        clearButton.setImage(UIImage(named: "Glyph/16x16/Clear")!, for: .normal)

        self.rightView = clearButton
        clearButton.addTarget(self, action: #selector(clearClicked), for: .touchUpInside)

        self.clearButtonMode = .never
        self.rightViewMode = .whileEditing
    }

    @objc func clearClicked(sender:UIButton) {
        self.text = ""
        self.bottomBorder.backgroundColor = .lightGreyColour
    }
}

---

我一直在读，但还是不明白。是否可能是crashlytics中的崩溃？您的VC是如何实例化的？performSegue（带有标识符：“myProfileSegue”，发送方：cell）。我已经更新了我的问题，以显示它是如何实例化的。

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    tableView.deselectRow(at: indexPath, animated: true)

    let menu = menuItems[indexPath.row]
    let menuTitle = menu.menuTitle

    switch menuTitle{

    case "My Profile":
        performSegue(withIdentifier: "myProfileSegue", sender: cell)
    //....
    }
}

class ProfileViewController: UIViewController {
    // ..
    @IBOutlet weak var emailTextField: CustomTextField! // Line no. 20
}

class CustomTextField: UITextField {

    var bottomBorder = UIView()

    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }

    override func awakeFromNib() {
        super.awakeFromNib()
        self.initialize()

        self.translatesAutoresizingMaskIntoConstraints = false

        bottomBorder = UIView.init(frame: CGRect(x: 0, y: 0, width: 0, height: 0))
        bottomBorder.backgroundColor = .lightGreyColour
        bottomBorder.translatesAutoresizingMaskIntoConstraints = false

        addSubview(bottomBorder)

        bottomBorder.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true
        bottomBorder.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
        bottomBorder.rightAnchor.constraint(equalTo: rightAnchor).isActive = true
        bottomBorder.heightAnchor.constraint(equalToConstant: 1).isActive = true
    }

    func initialize() {
        let clearButton = UIButton(frame: CGRect(x: 0, y: 0, width: 16, height: 16))
        clearButton.setImage(UIImage(named: "Glyph/16x16/Clear")!, for: .normal)

        self.rightView = clearButton
        clearButton.addTarget(self, action: #selector(clearClicked), for: .touchUpInside)

        self.clearButtonMode = .never
        self.rightViewMode = .whileEditing
    }

    @objc func clearClicked(sender:UIButton) {
        self.text = ""
        self.bottomBorder.backgroundColor = .lightGreyColour
    }
}