hashaam

// https://hashaam.com/2017/11/13/adjust-baseline-of-text-using-nsattributedstring/

let attributedString = NSAttributedString(string: “text", attributes: [
    NSFontAttributeName: font,
    NSForegroundColorAttributeName: UIColor.white,
    NSBaselineOffsetAttributeName: -5.0
])

hashaam

// https://hashaam.com/2017/11/13/url-encode-only-unicode-characters/

let originalURLString = "https://www.exampleserver.com/articles/latest/لن-تصدق-ما-يمكن-أن-تجده-في-مطبخك-فاحذر-غسل-هذه-الأداة.html"
let allowedCharacterSet = CharacterSet.urlFragmentAllowed
let urlString = originalURLString.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet)!
let url = URL(string: urlString)!

hashaam

// https://hashaam.com/2017/09/02/adjust-scroll-view-content-inset-based-on-keyboard-frame

func adjustForKeyboardHandler(notification: Notification) {
        
    // this method assumes scrollView is defined
        
    guard let userInfo = notification.userInfo else { return }
    guard let value = userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
    
    let keyboardFrame = value.cgRectValue

hashaam

// https://hashaam.com/2017/09/02/adjust-scroll-view-content-inset-based-on-keyboard-frame

override func viewWillAppear(_ animated: Bool) {
    NotificationCenter.default.addObserver(self, selector: #selector(adjustForKeyboardHandler(notification:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(adjustForKeyboardHandler(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}

hashaam

// https://hashaam.com/2017/09/02/get-specific-urlqueryitem-from-urlcomponents

if let utmTermValue = queryParam(urlString: "http://www.example.com/?utm_source=adsite&utm_campaign=adcampaign&utm_term=adkeyword", param: "utm_term") { 
    // handle utmTermValue
}

hashaam

// https://hashaam.com/2017/09/02/get-specific-urlqueryitem-from-urlcomponents

func queryParam(urlString: String?, param: String) -> String? {
        
    guard let urlString = urlString else { return nil }
    guard let urlComponents = URLComponents(string: urlString) else { return nil }
    guard let queryItems = urlComponents.queryItems else { return nil }
    return queryItems.filter { queryItem in
        return queryItem.name == param
    }.first?.value

hashaam

// https://hashaam.com/2017/09/02/get-filename-without-extension

let path = "hls_a128_v4.m3u8"
let url = URL(string: path)
let filename = url?.deletingPathExtension().lastPathComponent

print(filename) // hls_a128_v4

let fileExtension = url?.pathExtension

hashaam

// https://hashaam.com/2017/08/31/uiwindow-presentation-context/

if let delegate = UIApplication.shared.delegate, let window = delegate.window, let viewController = window?.presentationContext() {
    // perform action on viewController            
}

hashaam

// https://hashaam.com/2017/08/31/uiwindow-presentation-context/

extension UIWindow {
    
    func presentationContext(context: UIViewController? = nil) -> UIViewController? {
        
        var presentationContextViewController = rootViewController
        if let context = context  {
            presentationContextViewController = context
        }

hashaam

// https://hashaam.com/2017/07/22/get-device-token-for-remote-push-notifications-in-swift-3/

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        
    let tokenParts = deviceToken.map { data -> String in
        return String(format: "%02.2hhx", data)
    }
        
    let token = tokenParts.joined()