swift4.2 xib设置边框颜色

swift4.2 xib设置边框颜色

@IBDesignable extension CALayer {
    @IBInspectable var borderUIColor: UIColor {
        get {
            return UIColor(cgColor: self.borderColor!)
        }
        set {
            self.borderColor = newValue.cgColor
        }
    }
}