refactor.swift

    
    override func viewDidLoad() {
        super.viewDidLoad()
        configureGestureRecognizer()
        
        RestKitManager.getChannelToken(channel.name) { token in

            if let token = token {
                let params = "player=twitchweb&token=\(token.token)&sig=\(token.sig)&allow_source=true&type=any&p=3633125"
                
                let set = NSCharacterSet.URLQueryAllowedCharacterSet()
                let url2 = "http://usher.twitch.tv/api/channel/hls/\(self.channel.name).m3u8?" + params.stringByAddingPercentEncodingWithAllowedCharacters(set)!
                
                let nsurl = NSURL(string: url2)
                self.player = AVPlayer(URL: nsurl!)
                let avPlayerLayer = AVPlayerLayer(player: self.player!)
                avPlayerLayer.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
                self.view.layer.addSublayer(avPlayerLayer)
                self.player?.play()
            }
        }
    }
    
    // Using function as a completion block

    override func viewDidLoad() {
        super.viewDidLoad()
        configureGestureRecognizer()
        
        RestKitManager.getChannelToken(channel.name, completion: playUsingToken)
    }
    
    private func playUsingToken(token: Token?) {
        if let token = token {
            let params = "player=twitchweb&token=\(token.token)&sig=\(token.sig)&allow_source=true&type=any&p=3633125"
            
            let set = NSCharacterSet.URLQueryAllowedCharacterSet()
            let url2 = "http://usher.twitch.tv/api/channel/hls/\(self.channel.name).m3u8?" + params.stringByAddingPercentEncodingWithAllowedCharacters(set)!
            
            let nsurl = NSURL(string: url2)
            self.player = AVPlayer(URL: nsurl!)
            let avPlayerLayer = AVPlayerLayer(player: self.player!)
            avPlayerLayer.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
            self.view.layer.addSublayer(avPlayerLayer)
            self.player?.play()
        }
    }