Youtube Video ID From URL - Objective C

Question

I basically have a Youtube url as an NSString, but I need to extract the video id that is displayed in the url. I found many tutorials on how to do this in php or and other

Answer 1

Swift 2 version for @Alex answer

func getYoutubeVideoId(youtubeLink:String) -> String?{
    var youtubeId:String? = nil
    let pattern: String = "((?<=(v|V)/)|(?<=be/)|(?<=(\\?|\\&)v=)|(?<=embed/))([\\w-]++)"
    do {
        let regex = try NSRegularExpression(pattern: pattern, options: .CaseInsensitive)
        if let regexMatch = regex.firstMatchInString(youtubeLink, options: NSMatchingOptions(rawValue: 0), range: NSRange(location: 0, length: youtubeLink.characters.count)) {
            youtubeId = (youtubeLink as NSString).substringWithRange(regexMatch.range)
        }
    }
    catch let error as NSError{
        print("Error while extracting youtube id \(error.debugDescription)")
    }

    return youtubeId
}