Ios 如何正确应用Swift中非拉丁字符的笔划？

我正在做一个将文本属性应用于UIlabel文本的项目。我使用常见的NSAttributedString键基本上应用strokeColor、strokeWidth和foregroundColor来生成所需的大纲效果。这个问题出现在非拉丁字符上，比如阿拉伯语，字母是单独突出显示的，而不是整个作品。字母通常是用阿拉伯语连接的，而未连接的英语字母是用空格隔开的。我附上了我正在处理的示例，其中包含问题的屏幕截图和期望的结果。我将感谢您的支持和建议

let quote = "الكتابة على الصور بخطوط جميلة"
        //let font = UIFont.systemFon.selft(ofSize: 50)
        let attributes: [NSAttributedString.Key: Any] = [
               .strokeColor: UIColor.green,
                .strokeWidth: -3.0,
                .foregroundColor: UIColor.red,
                .font: UIFont(name: "Georgia-Bold", size: 40)!,
        ]
        let attributedQuote = NSAttributedString(string: quote, attributes: attributes) 
        TextLabel.attributedText = attributedQuote

有问题的结果：

预期结果：

---

快速查看一下，并将其与css的类似输出进行比较，我认为您需要使用两个相互重叠的标签层

尝试一下：

    let backLabel = UILabel()
    let frontLabel = UILabel()

    backLabel.translatesAutoresizingMaskIntoConstraints = false
    frontLabel.translatesAutoresizingMaskIntoConstraints = false

    view.addSubview(backLabel)
    view.addSubview(frontLabel)

    NSLayoutConstraint.activate([
        backLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 100.0),
        backLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20.0),
        backLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20.0),

        frontLabel.topAnchor.constraint(equalTo: backLabel.topAnchor),
        frontLabel.leadingAnchor.constraint(equalTo: backLabel.leadingAnchor),
        frontLabel.trailingAnchor.constraint(equalTo: backLabel.trailingAnchor),
    ])

    let quote = "الكتابة على الصور بخطوط جميلة"

    var attributes: [NSAttributedString.Key: Any] = [
        .strokeColor: UIColor.green,
        .strokeWidth: 12.0,
        .foregroundColor: UIColor.red,
        .font: UIFont(name: "Georgia-Bold", size: 40)!,
    ]
    var attributedQuote = NSAttributedString(string: quote, attributes: attributes)
    backLabel.attributedText = attributedQuote

    attributes = [
        .strokeColor: UIColor.green,
        .strokeWidth: 0,
        .foregroundColor: UIColor.red,
        .font: UIFont(name: "Georgia-Bold", size: 40)!,
    ]
    attributedQuote = NSAttributedString(string: quote, attributes: attributes)
    frontLabel.attributedText = attributedQuote

结果:

---

快速查看一下，并将其与css的类似输出进行比较，我认为您需要使用两个相互重叠的标签层

尝试一下：

    let backLabel = UILabel()
    let frontLabel = UILabel()

    backLabel.translatesAutoresizingMaskIntoConstraints = false
    frontLabel.translatesAutoresizingMaskIntoConstraints = false

    view.addSubview(backLabel)
    view.addSubview(frontLabel)

    NSLayoutConstraint.activate([
        backLabel.topAnchor.constraint(equalTo: view.topAnchor, constant: 100.0),
        backLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20.0),
        backLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20.0),

        frontLabel.topAnchor.constraint(equalTo: backLabel.topAnchor),
        frontLabel.leadingAnchor.constraint(equalTo: backLabel.leadingAnchor),
        frontLabel.trailingAnchor.constraint(equalTo: backLabel.trailingAnchor),
    ])

    let quote = "الكتابة على الصور بخطوط جميلة"

    var attributes: [NSAttributedString.Key: Any] = [
        .strokeColor: UIColor.green,
        .strokeWidth: 12.0,
        .foregroundColor: UIColor.red,
        .font: UIFont(name: "Georgia-Bold", size: 40)!,
    ]
    var attributedQuote = NSAttributedString(string: quote, attributes: attributes)
    backLabel.attributedText = attributedQuote

    attributes = [
        .strokeColor: UIColor.green,
        .strokeWidth: 0,
        .foregroundColor: UIColor.red,
        .font: UIFont(name: "Georgia-Bold", size: 40)!,
    ]
    attributedQuote = NSAttributedString(string: quote, attributes: attributes)
    frontLabel.attributedText = attributedQuote

结果:

---

谢谢！我尝试了这个选项，如果工作如预期！帮我节省了很多时间，伙计！再次感谢汉克斯！我尝试了这个选项，如果工作如预期！帮我节省了很多时间，伙计！再次感谢有人尝试使用cgContext的core graphics解决此问题？有人尝试使用cgContext的core graphics解决此问题吗？