efremidze

extension String {
    var count: Int {
        var length = 0
        enumerateSubstrings(in: startIndex..<endIndex, options: .byComposedCharacterSequences) { substring, substringRange, enclosingRange, stop in
            length += 1
        }
        return length
    }
}

efremidze

extension Dictionary where Value == Any {
    func value<T>(forKey key: Key, defaultValue: @autoclosure () -> T) -> T {
        guard let value = self[key] as? T else { return defaultValue() }
        return value
    }
}

efremidze

protocol EnumStringConvertible: CustomStringConvertible {}
extension EnumStringConvertible {
    var description: String { return String(reflecting: self) }
}

protocol EnumUserDefaultsConvertible: EnumStringConvertible {}
extension EnumUserDefaultsConvertible {
    var key: String { return description }
    var value: Any? {
        get { return UserDefaults.standard[key] }

efremidze

private var targets = [Target]()

extension UIGestureRecognizer {
    
    convenience init(action: @escaping (UIGestureRecognizer) -> ()) {
        self.init()
        addAction(action)
    }
    
    func addAction(_ action: @escaping (UIGestureRecognizer) -> ()) {

efremidze

// barTintColor will apply color for the app's navigation bar
UINavigationBar.appearance().barTintColor = .blue
// backgroundColor will apply color for some of the sharing container's app except for Messages app
UINavigationBar.appearance().backgroundColor = .blue
// backgroundImage will apply the color image for navigation bar for most of the sharing container's except for `Notes`
UINavigationBar.appearance().setBackgroundImage(UIImage(color: .blue), for: .default)

UINavigationBar.appearance().tintColor = .white
UINavigationBar.appearance().titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]

efremidze

func delay(_ seconds: Int, _ queue: DispatchQueue = .main, _ closure: @escaping () -> Void) {
    let time = DispatchTime.now() + .seconds(seconds)
    queue.asyncAfter(deadline: time, execute: closure)
}

efremidze

// preprocessor macros for logging

#define DefaultLog [NSString stringWithFormat:@"%s (line %d)", __PRETTY_FUNCTION__, __LINE__]
#define LogWarn(format, ...) NSLog((@"%@ -> WARNING: " format), DefaultLog, ##__VA_ARGS__)
#define LogError(format, ...) NSLog((@"%@ -> ERROR: " format), DefaultLog, ##__VA_ARGS__)

efremidze

extension UIButton {
    
    func addSpringAnimation() {
        addTarget(self, action: #selector(scaleDown), for: [.touchDown, .touchDragEnter])
        addTarget(self, action: #selector(scaleUp), for: [.touchUpInside, .touchDragExit, .touchCancel])
    }
    
    @IBAction func scaleDown(_ button: UIButton) {
        UIView.animate(withDuration: 0.1, delay: 0, options: [.allowUserInteraction, .curveLinear], animations: {
            button.transform = CGAffineTransform(scaleX: 0.75, y: 0.75)

efremidze

extension Dictionary {
    
    subscript(key: Key, `default` value: Value) -> Value {
        mutating get {
            return self[key] ?? {
                self[key] = value
                return value
            }()
        }
        set { self[key] = newValue }

efremidze

import Typist

protocol KeyboardAware {
    var keyboard: Typist { get }
    var contentInset: UIEdgeInsets { get }
    var scrollIndicatorInsets: UIEdgeInsets { get }
}

extension KeyboardAware where Self: UIScrollView {
    func observeKeyboard() {