UIView in UITableViewCell Has Double Border - swift

Question

With the code below, I add a colored border and round the corners passed. However, when I resize the UIView programmatically, the old border remains and I get this double border:
Anyone have an idea how to fix it? I've tried calling cell.layoutSubviews() and cell.layer.layoutSublayers(). I tried removing the border layer and setting the layers to nil before setting the border. Nothing seems to work.
if I don't resize the view, it's fine.
func roundCorners (view: UIView, corners: UIRectCorner, radius: CGFloat, color: String) {
let bounds = view.bounds
let maskPath = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
let maskLayer = CAShapeLayer()
maskLayer.frame = bounds
maskLayer.path = maskPath.cgPath
view.layer.mask = maskLayer
var borderColor = UIColor(red: 0/255.0, green: 0/255.0, blue: 0/255.0, alpha: 1.0)
switch color {
case "Green":
borderColor = UIColor(red: 130/255.0, green: 208/255.0, blue: 151/255.0, alpha: 0.9)
case "Red":
borderColor = UIColor(red: 243/255.0, green: 44/255.0, blue: 31/255.0, alpha: 1.0)
view.alpha = 0.5
case "Purp":
borderColor = UIColor(red: 102/255.0, green: 135/255.0, blue: 241/255.0, alpha: 0.7)
case "DarkBlue":
borderColor = UIColor(red: 90/255.0, green: 125/255.0, blue: 160/255.0, alpha: 0.6)
default:
borderColor = UIColor(red: 150/255.0, green: 150/255.0, blue: 150/255.0, alpha: 0.7)
}
let frameLayer = CAShapeLayer()
frameLayer.frame = bounds
frameLayer.path = maskPath.cgPath
frameLayer.strokeColor = borderColor.cgColor
frameLayer.lineWidth = 3
frameLayer.fillColor = nil
view.layer.addSublayer(frameLayer)
}
Called from cellForRowAt:
roundCorners(view: cell.MoveCellTo_TodayList, corners: [.topLeft, .bottomLeft], radius: 8, color: "Green")

Answer 1

Move maskLayer and frameLayer out of the function's scope and call the roundCorners inside the cell's overridden layoutSubviews.
var maskLayer: CAShapeLayer!
var frameLayer: CAShapeLayer!
override func layoutSubviews() {
super.layoutSubviews()
roundCorners(view: MoveCellTo_TodayList, maskLayer: &maskLayer, frameLayer: &frameLayer, corners: [.topLeft, .bottomLeft], radius: 8, color: "Green")
}
func roundCorners(view: UIView, maskLayer: inout CAShapeLayer, frameLayer: inout CAShapeLayer, corners: UIRectCorner, radius: CGFloat, color: String) {
let bounds = view.bounds
let maskPath = UIBezierPath(roundedRect: bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))
if maskLayer == nil {
maskLayer = CAShapeLayer()
view.layer.mask = maskLayer
frameLayer = CAShapeLayer()
view.layer.addSublayer(frameLayer)
}
[...]
}