swift使UIView子类的属性支持UIAppearance

篇首语：本文由编程笔记#小编为大家整理，主要介绍了swift 使UIView子类的属性支持UIAppearance相关的知识，希望对你有一定的参考价值。

dynamic var borderColor: UIColor? = .black {
didSet {
layer.borderWidth = 1.0
layer.borderColor = borderColor?.cgColor
}
}
BorderView.appearance().borderColor = .red