Nil与预期的参数类型'NSLayoutAnchor 不兼容

this is the problematic code

这是有问题的代码

    // auto layout
    let vertivalConstraint = textField.centerYAnchor.constraint(equalTo: self.codeView.centerYAnchor)
    let leadingConstraint = textField.leadingAnchor.constraint(equalTo: self.codeView.leadingAnchor, constant: 10)
    let trailingConstraint = textField.trailingAnchor.constraint(equalTo: self.codeView.trailingAnchor, constant: -10)
    let heightConstraint = textField.heightAnchor.constraint(equalTo: nil, constant: 37)
    NSLayoutConstraint.activate([leadingConstraint, vertivalConstraint, trailingConstraint, heightConstraint])
    /