如何在UITextView中设置边距(填充)？

textView.textContainerInset = UIEdgeInsets(top: 10, left: 15, bottom: 10, right: 15)

textView.layoutMargins = UIEdgeInsets(top: 10, left: 15, bottom: 10, right: 15)
textView.textContainer.lineFragmentPadding = 0

textView.contentInset = UIEdgeInsets(top: 10, left: 15, bottom: 10, right: 15)

class PaddedTextView: UIView {
    let textView = UITextView()

    init() {
        super.init(frame: .zero)

        addSubview(textView)
        textView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            textView.topAnchor.constraint(equalTo: topAnchor, constant: 10),
            textView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 15),
            textView.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -10),
            textView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -15)
        ])
    }

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