lamprosg

//Create the xib CustomView.xib and add the View class as CustomView (this one)

override func awakeAfter(using aDecoder: NSCoder) -> Any? {
        if self.subviews.isEmpty {
            let nib = UINib(nibName: "CustomView", bundle: nil)
            let viewArray = nib.instantiate(withOwner: nil, options: nil)
            guard let view = viewArray.first as? CustomView else {
                return self
            }
            view.translatesAutoresizingMaskIntoConstraints = false

lamprosg

import UIKit
extension UILabel {

    /// Highlights a specific substring of the label's text with a desired color
    /// Text must be set before calling this method.
    ///
    /// - Parameters:
    ///   - subString: The substring to change color
    ///   - color: The desired color
    func highlight(subString: String, color: UIColor?) {

lamprosg

import UIKit

extension UIView {

    func roundCorners(corners: UIRectCorner, radius: CGFloat) {
        let path = UIBezierPath(roundedRect: bounds,
                                byRoundingCorners: corners,
                                cornerRadii: CGSize(width: radius, height: radius))
        let mask = CAShapeLayer()
        mask.path = path.cgPath

lamprosg

//https://medium.com/@nimjea/grand-central-dispatch-in-swift-fdfdd8b22d52
//https://medium.com/@wailord/a-high-level-primer-on-ios-concurrency-df3bca3a6993
//https://cocoacasts.com/choosing-between-nsoperation-and-grand-central-dispatch/

DispatchQueue.main.async {
     // Perform your async code here
}

//Synced operations
let northZone = DispatchQueue(label: "perform_task_with_team_north")

lamprosg

//Variation of this feature: https://www.swiftbysundell.com/posts/reusable-data-sources-in-swift

import UIKit

/// Keep a strong reference to this, since UITableView only uses a weak reference for it. Used only for simple table views fast rendering.
class TableViewCommonCellDataSource<Model>: NSObject, UITableViewDataSource {

    /// Cell configuration
    typealias CellConfigurator = (Model, UITableViewCell) -> Void
    

lamprosg

extension UIViewController {
    private static var _myComputedProperty = [String:Bool]()
    
    var myComputedProperty:Bool {
        get {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))
            return UIViewController._myComputedProperty[tmpAddress] ?? false
        }
        set(newValue) {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))

lamprosg

class MySwitch: UISwitch {
    
    typealias DidTapSwitch = (WMSwitch) -> ()
    
    var didChangeState: DidTapSwitch? {
        didSet {
            if didChangeState != nil {
                addTarget(self, action: #selector(self.switchStateDidChange(_:)), for: .valueChanged)
            } else {
                removeTarget(self, action: #selector(self.switchStateDidChange(_:)), for: .valueChanged)

lamprosg

//Map
//Loops over a collection and applies the same operation to each element in the collection.

var numberArray = [1,2,3,4,5]

var newArray = numberArray.map( {(value:Int) -> Int in
  return value*2
})

//or quicker

lamprosg

import UIKit

class CircleView: UIView {
    
    var viewLoaded:Bool = false
    
    var lineWidth:CGFloat = 10
    var animationDuration:Double = 5
    
    let circlePathLayer = CAShapeLayer()

lamprosg

//In case we had to load a view from a xib
//In case we had a nib for the chart
   override public func awakeAfter(using aDecoder: NSCoder) -> Any? {

       let isPlaceHolder:Bool = self.subviews.count == 0

       if isPlaceHolder {
           let lineChartView:MyLineChartView? = Bundle.main.loadNibNamed("LineChartViewNibName", owner: nil, options: nil)?.first as? MyLineChartView
           lineChartView?.autoresizingMask = self.autoresizingMask;
           lineChartView?.translatesAutoresizingMaskIntoConstraints = self.translatesAutoresizingMaskIntoConstraints;