유용한 UIView Extension

1. 원형으로 View Clip하는 옵션 추가

@IBInspectable var useAutoCornerRadius: Bool {
  set {
    guard newValue else { return }
    layer.cornerRadius = frame.height / 2
    clipsToBounds = layer.cornerRadius > 0
  }
  get {
    return self.useAutoCornerRadius
  }
}

2. Border Configuration 옵션 추가

@IBInspectable var ibCornerRadius: CGFloat {
  set {
    layer.cornerRadius = newValue
    clipsToBounds = newValue > 0
  }
  get {
    return layer.cornerRadius
  }
}

@IBInspectable var ibBorderWidth: CGFloat {
  set {
    layer.borderWidth = newValue
  }
  get {
    return layer.borderWidth
  }
}

@IBInspectable var ibBorderColor: UIColor? {
  set {
    self.layer.borderColor = newValue?.cgColor
  }
  get {
    guard let color = layer.borderColor else { return nil }
    return UIColor(cgColor: color)
  }
}

3. Shadow Configuration 옵션 추가

@IBInspectable var shadowRadius: CGFloat {
  get { return layer.shadowRadius }
  set { layer.shadowRadius = newValue }
}

@IBInspectable var shadowOpacity: CGFloat {
  get { return CGFloat(layer.shadowOpacity) }
  set { layer.shadowOpacity = Float(newValue) }
}

@IBInspectable var shadowOffset: CGSize {
  get { return layer.shadowOffset }
  set { layer.shadowOffset = newValue }
}

@IBInspectable var shadowColor: UIColor? {
  get {
    guard let cgColor = layer.shadowColor else {
      return nil
    }
    return UIColor(cgColor: cgColor)
  }
    set { layer.shadowColor = newValue?.cgColor }
}