Style content in a TableView without causing the scrolling to lag - swift

Question

I have a TableView, with about 15 to 20 displayed cells. The cell has a Label with the following class:
import Foundation
import UIKit
class RoundedLabel: UILabel {
var inset: CGFloat = 16
override func drawText(in rect: CGRect) {
let insets = UIEdgeInsets(top: 2, left: 2, bottom: 2, right: 2)
super.drawText(in: rect.inset(by: insets))
}
override func layoutSubviews() {
super.layoutSubviews()
updateCornerRadius()
}
override var intrinsicContentSize: CGSize {
let size = super.intrinsicContentSize
return CGSize(
width: size.width + inset,
height: size.height
)
}
#IBInspectable var rounded: Bool = false {
didSet {
updateCornerRadius()
}
}
func updateCornerRadius() {
layer.cornerRadius = rounded ? frame.size.height / 2 : 0
layer.masksToBounds = true
}
}
In my VC I have the following (I have to TableViews in one VC):
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if tableView == tableViewMainLatest {
let cell = tableViewMainLatest.dequeueReusableCell(withIdentifier: "cellMainLatest", for: indexPath) as! MainLatestTableViewCell
let postDate = posts[indexPath.row].postDate ?? 0
let formattedPostDate = Date(timeIntervalSince1970: postDate)
let timeAgo = formattedPostDate.timeAgo(numericDates: false)
let postCity = posts[indexPath.row].postFromCity ?? "?"
let postCountry = posts[indexPath.row].postFromCountry ?? "?"
let postComments = posts[indexPath.row].comments ?? 0
let maxPostComments: String?
// Only show the number if comment amount is less than 100
if postComments > 99 {
maxPostComments = "99+"
} else {
maxPostComments = String(postComments)
}
cell.labelPostDate.text = timeAgo
cell.labelPostFrom.text = postCity + ", " + postCountry
cell.labelAmountComments.text = maxPostComments
return cell
} else if tableView == tableViewCategories {
let cell = tableViewCategories.dequeueReusableCell(withIdentifier: "cellMainCategories", for: indexPath) as! MainApplicationCategoriesTableViewCell
cell.labelCategories.text = pseudo[indexPath.row] as? String
cell.alpha = 0.55
UIView.animate(withDuration: 0.5, animations: {
cell.alpha = 1
})
return cell
}
return UITableViewCell()
}
My CustomCell:
class MainApplicationCategoriesTableViewCell: UITableViewCell {
// Storyboard
#IBOutlet weak var labelCategories: UILabel! {
didSet {
labelCategories.layer.borderWidth = 1
labelCategories.layer.borderColor = UIColor(red:0.88, green:0.88, blue:0.88, alpha:1.0).cgColor
}
}
override func awakeFromNib() {
super.awakeFromNib()
self.selectionStyle = .none
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
When I use this piece of code:
// Storyboard
#IBOutlet weak var labelCategories: UILabel! {
didSet {
labelCategories.layer.borderWidth = 1
labelCategories.layer.borderColor = UIColor(red:0.88, green:0.88, blue:0.88, alpha:1.0).cgColor
}
}
The scrolling of the TableView is lagging. Where do I have to apply the borderWidth / borderColor, to still have a good user experience without lagging?