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fahied / UserDefault.swift
Created Feb 16, 2020
Reduce Boiler Plate code for UserDefault using PropertyWrapper
View UserDefault.swift
// Strongly Typed key
struct Key: RawRepresentable {
let rawValue: String
extension Key: ExpressibleByStringLiteral {
init(stringLiteral: String) {
rawValue = stringLiteral
fahied / autotrack.swift
Last active Dec 17, 2019
Auto Track Analytics iOS
View autotrack.swift
@objc class AutoTrackedViewController: UIViewController {
override func viewDidAppear(_ animated: Bool) {
tracker.trackScreen(name: Self.screenName, className: Self.className)
override func viewDidLoad() {
View iOS Swift - Cancellable Task with

iOS Swift - Cancellable Task with GCD


I think most of you guys know GCD pretty well. Basically, GCD is a high level API to handle multi-threading operations. We use GCD almost on daily basis to switch thread and execute codes like:

DispatchQueue.main.async { //execute some codes here } 
//switch to main queue and execute codes asynchronously

DispatchQueue.main.sync { //execute some codes here } 
//switch to main queue and execute codes synchronously
fahied /
Last active Dec 15, 2019
Symbolicate iOS crash manually

Step 1: Use the following command in Terminal to find the dSYM on your Mac which build the app

mdfind "com_apple_xcode_dsym_uuids == 12345678-90AB-CDEF-1234-567890ABCDEF"

The string "12345678-90AB-CDEF-1234-567890ABCDEF" is the UUID string from the crash report reformatted to uppercase and 8-4-4-4-12 groups.

Step 2: Symobolicate Crash Report. Excute the following line before symbolicating

fahied / AssetExtractor.swift
Created Apr 11, 2019
Get URL from Xcode asset catalogs
View AssetExtractor.swift
import UIKit
//It basically just gets image from assets, saves its data to disk and return file URL.
class AssetExtractor {
static func createLocalUrl(forImageNamed name: String) -> URL? {
let fileManager = FileManager.default
let cacheDirectory = fileManager.urls(for: .cachesDirectory, in: .userDomainMask)[0]
let url = cacheDirectory.appendingPathComponent("\(name).png")
fahied / alert.swift
Created Apr 10, 2019
UIWindow Alert
View alert.swift
func showAlert(message: String) {
let alert = UIAlertController(title: "Link", message: message, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
case .default:
case .cancel:
View MultiLineButton.swift
import UIKit
class MultiLineButton: UIButton {
// MARK: - Init
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
fahied / youtubeLandscape
Created Jul 12, 2017
iOS: Play youtube video in fullscreen when device orientation is landscape
View youtubeLandscape
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
if window == self.window {
return .portrait
} else {
return .allButUpsideDown
fahied / hackerRank.swift
Last active Jul 4, 2017
HackerRank Read Input with Swift
View hackerRank.swift
//Read String array separated by new line character
func readInput () -> [String]{
let n: Int = Int(readLine()!)!
var strs = [String]()
(0...n-1).map { _ in
return strs
fahied / etag
Created May 28, 2017 — forked from kevindelord/etag
How to integrate Etag in Swift
View etag
let API_HEADER_FIELD_NONE_MATCH : String = "If-None-Match"
let API_HEADER_FIELD_ETAG : String = "Etag"
func ETagForURL(urlString: String) -> String? {
// return the saved ETag value for the given URL
return NSUserDefaults.standardUserDefaults().objectForKey(urlString) as String?
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