「ロングタップからのスワイプ」を表現するカスタムUIGetureRecognizer

こちらも必要に迫られたので作りました。
こちらと合わせてご確認ください。
あと最初ハマったのでこちらも参照ください。
http://qiita.com/okitsutakatomo/items/37e717f2b34a957cca8f

//
//  UIHuttobasuGestureRecognizer.swift
//
//  Created by Takatomo Okitsu on 2014/12/25.
//  Copyright (c) 2014年 Takatomo Okitsu. All rights reserved.
//

import UIKit

var kHuttobasuGestureReturnDistance:CGFloat = 20

class UIHuttobasuGestureRecognizer :UIGestureRecognizer {

    var timeOutTimer:NSTimer?
    var longTapTimer:NSTimer?
    var startingPoint:CGPoint?
    var longTapped:Bool = false

    override func reset() {
        startingPoint = nil
        longTapped = false
    }

    override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
        self.invalidateTimer()

        if touches.count > 1 {
            self.state = UIGestureRecognizerState.Failed
        } else {
            let touch:UITouch = touches.anyObject()? as UITouch
            if touch.tapCount > 1 {
                self.state = .Failed
            } else {
                longTapTimer = NSTimer.scheduledTimerWithTimeInterval(0.3, target: self, selector: "handleLongTapped", userInfo: nil, repeats: false)
                timeOutTimer = NSTimer.scheduledTimerWithTimeInterval(0.8, target: self, selector: "handleTimeOut", userInfo: nil, repeats: false)
                return
            }
        }
    }

    override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {
        let touch:UITouch = touches.anyObject()? as UITouch
        if self.state == .Possible {
            if self.longTapped {
                if startingPoint == nil {
                    startingPoint = touch.locationInView(nil)
                } else {
                    let point = touch.locationInView(nil)
                    let distance = (point - startingPoint!).length
                    if distance > kHuttobasuGestureReturnDistance {
                        self.state = UIGestureRecognizerState.Ended //event fired
                    }
                }
            }
        } else {
            self.state = .Failed
        }
    }

    override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
        self.invalidateTimer()
        self.state = .Failed
    }

    override func touchesCancelled(touches: NSSet, withEvent event: UIEvent) {
        self.invalidateTimer()
        self.state = .Cancelled
    }

    func invalidateTimer() {
        timeOutTimer?.invalidate()
        timeOutTimer = nil

        longTapTimer?.invalidate()
        longTapTimer = nil
    }

    func handleTimeOut() {
        self.invalidateTimer()
        self.state = .Failed
    }

    func handleLongTapped() {
        self.longTapped = true
    }
}