meyusufdemirci

import UIKit

extension UIImage {

    func compress(maxKb: Double) -> Data? {
        let quality: CGFloat = maxKb / self.sizeAsKb()
        let compressedData: Data? = self.jpegData(compressionQuality: quality)
        return compressedData
    }

meyusufdemirci

// USAGE
collectionView.register([CELL_CLASS_NAME.self])

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell: CELL_CLASS_NAME = collectionView.dequeueReusableCell(indexPath: indexPath)
}
// USAGE

import UIKit

meyusufdemirci

import RxCocoa
import RxSwift

class ListViewModel {

    // MARK: Properties

    let coins: BehaviorRelay<[Coin]> = .init(value: [])

    func refreshCoins() {

meyusufdemirci

import UIKit
import RxSwift
import RxCocoa

class ListController: UITableViewController {

    // MARK: Properties

    private let searchController: UISearchController = {
        let controller: UISearchController = UISearchController()

meyusufdemirci

import Foundation

class ListViewModel {

    // MARK: Properties

    var coins: [Coin] = []

    var coinsDidRefresh: (() -> Void)?
    var coinsCouldNotRefresh: (() -> Void)?

meyusufdemirci

import UIKit

class ListController: UITableViewController {

    // MARK: Properties

    private let searchController: UISearchController = {
        let controller: UISearchController = UISearchController()
        controller.searchBar.placeholder = "Search"
        controller.obscuresBackgroundDuringPresentation = false

meyusufdemirci

import Foundation

protocol ListDelegate {
    func coinsDidRefresh()
    func coinsCouldNotRefresh()
}

class ListViewModel {

    // MARK: Properties

meyusufdemirci

import UIKit

class ListController: UITableViewController {

    // MARK: Properties

    private let searchController: UISearchController = {
        let controller: UISearchController = UISearchController()
        controller.searchBar.placeholder = "Search"
        controller.obscuresBackgroundDuringPresentation = false

meyusufdemirci

if let userId: String = KeychainManager.shared["userId"], !userId.isEmpty {
  // found an userId, which means the user already has opened the app before
  // next step: open the home screen or whatever you want
} else {
  // the user launches the app for the first time
  let newUserId = uniqueId(length: 10)
  KeychainManager.shared["userId"] = newUserId
  // next step: open the home screen or whatever you want
}

meyusufdemirci

KeychainManager.shared["email"] = "[email protected]"