GemmaDelOlmo

extension UIImage
{
    func tint(color:UIColor) -> UIImage? {
        
        UIGraphicsBeginImageContextWithOptions(size, false, UIScreen.main.scale)
        guard let context = UIGraphicsGetCurrentContext() else { return nil }
        
        context.scaleBy(x: 1.0, y: -1.0)
        context.translateBy(x: 0.0, y: -size.height)
        

GemmaDelOlmo

extension String {
    func validateEmail() -> Bool {
        let emailRegEx = "^.+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*$"
        
        let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
        return emailTest.evaluate(with: self)
    }
}

GemmaDelOlmo

extension UIColor {
    public convenience init(hex: Int) {
        let components = (
            R: CGFloat((hex >> 16) & 0xff) / 255,
            G: CGFloat((hex >> 08) & 0xff) / 255,
            B: CGFloat((hex >> 00) & 0xff) / 255
        )
        self.init(red: components.R, green: components.G, blue: components.B, alpha: 1)
    }
}

GemmaDelOlmo

extension UIImageView {
    func addImageFromURL(urlString: String) {
        guard let imgURL: NSURL = NSURL(string: urlString) else { return }
        let request: NSURLRequest = NSURLRequest(url: imgURL as URL)
        NSURLConnection.sendAsynchronousRequest(
            request as URLRequest, queue: OperationQueue.main,
            completionHandler: {(response: URLResponse? ,data: Data? ,error: Error? ) -> Void in
                if error == nil {
                    self.image = UIImage(data: data!)
                }

GemmaDelOlmo

import Foundation

do {
    let testDictionary = ["1": "Foo",
                          "2": "Bar"]
    let JSONData = try JSONSerialization.data(withJSONObject:
        testDictionary ,
                                              options: .prettyPrinted)
    let JSONString = NSString(data: JSONData,
                              encoding: String.Encoding.ascii.rawValue)

GemmaDelOlmo

//STEPS TO IMPLEMENT STRATEGY PATTERN ON PROTOCOL ORIENTED MVVM VIEWCONTROLLER WITH MVVM CELLS
//1: The ViewController will have a collection of cell viewModels
//2: There must be a drawer class for each cell that implements the cell drawer protocol
//3: Each of the cellViewModels must implement the viewModel generic protocol in order to have a reference to the cellDrawer

//DRAWER AND VIEWMODEL PROTOCOLS
protocol <#YOUR_DRAWER_PROTOCOL_NAME#> {
    func cellFor(tableView: UITableView, atIndexPath: IndexPath) -> UITableViewCell
    func draw(_ cell: UITableViewCell, cellViewModel: Any, viewModel: <#CONTROLLER_VIEWMODEL_PROTOCOL#>)
    func heightFor(tableView: UITableView, atIndexPath: IndexPath, cellViewModel: Any) -> CGFloat

GemmaDelOlmo

//: Playground - noun: a place where people can play
/*
 Created by: Gemma del Olmo
 */

import UIKit

class Person {
    let age : Int
    let firstName : String

GemmaDelOlmo

extension Optional {
    
    //Executes the closure if there is some value
    func then(_ handler: (Wrapped) -> Void) {
        switch self {
        case .some(let wrapped): return handler(wrapped)
        case .none: break
        }
    }
    

GemmaDelOlmo

extension UITableView {
    
    func register<T: UITableViewCell>(_: T.Type) where T: NibLoadableView {
        let bundle = Bundle(for: T.self)
        let nib = UINib(nibName: T.nibName, bundle: bundle)
        
        self.register(nib, forCellReuseIdentifier: T.defaultReuseIdentifier)
    }
    
    func registerHeader<T: UIView>(_: T.Type) where T: ReusableView, T: NibLoadableView {

GemmaDelOlmo

extension String {
    static func localized(_ identifier: String) -> String {
        return NSLocalizedString(identifier, comment: "")
    }
}