gkhackers

  NSData *data = [CNContactVCardSerialization dataWithContacts:@[self.contact] error:nil];
  NSItemProvider *provider = [[NSItemProvider alloc] initWithItem:data typeIdentifier:(NSString *)kUTTypeVCard];
            
  UIActivityViewController *avc = [[UIActivityViewController alloc] initWithActivityItems:@[provider] applicationActivities:nil];
  [self presentViewController:avc animated:YES completion:nil];

gkhackers

extension String {
    func link() -> URL? {
        let detector = try! NSDataDetector(types: NSTextCheckingResult.CheckingType.link.rawValue)
        let matches = detector.matches(in: self, options: [], range: NSRange(location: 0, length: self.count))
        
        if matches.count > 0 {
            for result in matches {
                if let urlString = result.url?.absoluteString {
                    let url = URL(string: urlString)
                    return url

gkhackers

func checkHashTags() {
  let matchedString = matches(for: "[#＃][Ａ-Ｚａ-ｚA-Za-z0-9０-９가-힣ㄱ-ㅎぁ-ヶｦ-ﾟー]+", in: self.text)
  print(matchedString)
}
    
func matches(for regex: String, in text: String) -> [String] {
        
  do {
        let regex = try NSRegularExpression(pattern: regex)
        let nsString = text as NSString

gkhackers

extension UITextInput {
    var selectedRange: NSRange? {
        guard let range = selectedTextRange else { return nil }
        let location = offset(from: beginningOfDocument, to: range.start)
        let length = offset(from: range.start, to: range.end)
        return NSRange(location: location, length: length)
    }
}

gkhackers

extension AVPlayerItem {
    enum TrackType {
        case subtitle
        case audio
        /**
         Return valid AVMediaSelectionGroup is item is available.
         */
        fileprivate func characteristic(item:AVPlayerItem) -> AVMediaSelectionGroup?  {
            let str: AVMediaCharacteristic = self == .subtitle ? .legible : .audible
            if item.asset.availableMediaCharacteristicsWithMediaSelectionOptions.contains(str) {

gkhackers

extension UIImageView {
    
    func start(){
        guard layer.sublayers?.first(where: {$0.name == "AnimatingGradient"}) == nil else { return }
                
        let light = UIColor(white: 1, alpha: 1).cgColor
        let alpha = UIColor.lightGray.cgColor

        let gradient = CAGradientLayer()
        gradient.name =  "AnimatingGradient"