在自定义视图中将属性字符串设置为标签

Question

这是我的自定义视图类： - 带标签的UIView - 我想添加一个标签作为带有约束的子视图

似乎在IB上显示

但不在模拟器中：

这是我的自定义视图：

我用：

setNeedsDisplay()
setNeedsLayout()

虽然没有帮助。

class StatusView: UIView {  

    private var titleLabel: UILabel?
    convenience init() {
        self.init(frame: .zero)
    }

    private func setupViews() {
        let titleAttributed = NSMutableAttributedString(string: text)
        let styleTitle = NSMutableParagraphStyle()

        styleTitle.alignment = .center
        titleAttributed.addAttribute(.paragraphStyle, value: styleTitle,
                                     range: NSRange(location: 0, length: titleAttributed.length))
        titleLabel?.attributedText = titleAttributed

        let styleDesc = NSMutableParagraphStyle()
        styleDesc.alignment = .center
        self.addSubview(titleLabel!)
    }

    func commonSetup() {


        self.backgroundColor = UIColor.green
        self.titleLabel = UILabel(frame: .zero)
        self.titleLabel!.translatesAutoresizingMaskIntoConstraints = false


        self.titleLabel!.backgroundColor = UIColor.gray

        print(self.titleLabel!.text)

        self.titleLabel!.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 15.0)
        self.titleLabel!.centerYAnchor.constraint(equalTo: self.centerYAnchor)

        self.addSubview(titleLabel!)
    }

    override public init(frame: CGRect) {
        super.init(frame: frame)
        self.commonSetup()
          setupViews()
    }

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

    override public func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        self.commonSetup()
    }

    var infoAttributed: NSAttributedString = NSAttributedString(string: "") {
        didSet {
            self.titleLabel?.attributedText = infoAttributed
            setNeedsDisplay()
        }
    }

    @IBInspectable var text: String = "RFC ..." {
        didSet {
            let stringWithAttribute = NSAttributedString(string: "text",
                                                         attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 24.0)])
            self.titleLabel?.text = "dsdsdsdsd"

        }
    }
}

在这部分中，我想使用NSAttributed字符串格式化文本。但内容并未显示。我错过了什么？

var infoAttributed: NSAttributedString = NSAttributedString(string: "") {
        didSet {
            self.titleLabel?.attributedText = infoAttributed
            setNeedsDisplay()
        }
    }

    @IBInspectable var text: String = "RFC ..." {
        didSet {
            let stringWithAttribute = NSAttributedString(string: "text",
                                                         attributes: [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 24.0)])
            self.titleLabel?.text = "dsdsdsdsd"

        }
    }