UITextView with placeholder text

PlaceholderTextView.swift

class PlaceholderTextView: UITextView {

    override init(frame: CGRect, textContainer: NSTextContainer?) {
        super.init(frame: frame, textContainer: textContainer)
    }

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

    override func becomeFirstResponder() -> Bool {
        let isFirstResponder = super.becomeFirstResponder()
        removePlaceholderIfNeeded()
        return isFirstResponder
    }

    override func resignFirstResponder() -> Bool {
        addPlaceholderIfNeeded()
        return super.resignFirstResponder()
    }

    var placeholderText: String? {
        didSet {
            addPlaceholderIfNeeded()
        }
    }

    override var text: String? {
        get {
            if isPlaceholding {
                return ""
            }
            return super.text
        }
        set {
            removePlaceholderIfNeeded()
            super.text = newValue
            addPlaceholderIfNeeded()
        }
    }

    var isPlaceholding: Bool = false

    private func addPlaceholderIfNeeded() {
        if super.text == nil || super.text == "" {
            addPlaceholder()
        }
    }

    private func removePlaceholderIfNeeded() {
        if isPlaceholding {
            removePlaceholder()
        }
    }

    private func addPlaceholder() {
        guard let placeholderText = placeholderText else {
            return
        }
        self.textColor = Color.lightText
        super.text = placeholderText
        isPlaceholding = true
    }

    private func removePlaceholder() {
        self.textColor = .black
        super.text = ""
        isPlaceholding = false
    }
}