Button node for Sprite kit in swift 2.1

FTButtonNode.swift

// Button node for Sprite kit in swift 2.1
// http://stackoverflow.com/questions/19082202/setting-up-buttons-in-skscene

import Foundation
import SpriteKit

class FTButtonNode: SKSpriteNode {
    
    enum FTButtonActionType: Int {
        case TouchUpInside = 1,
        TouchDown, TouchUp
    }
    
    var isEnabled: Bool = true {
        didSet {
            if (disabledTexture != nil) {
                texture = isEnabled ? defaultTexture : disabledTexture
            }
        }
    }
    var isSelected: Bool = false {
        didSet {
            texture = isSelected ? selectedTexture : defaultTexture
        }
    }
    
    var defaultTexture: SKTexture
    var selectedTexture: SKTexture
    var label: SKLabelNode
    
    required init(coder: NSCoder) {
        fatalError("NSCoding not supported")
    }
    
    init(normalTexture defaultTexture: SKTexture!, selectedTexture:SKTexture!, disabledTexture: SKTexture?) {
        
        self.defaultTexture = defaultTexture
        self.selectedTexture = selectedTexture
        self.disabledTexture = disabledTexture
        self.label = SKLabelNode(fontNamed: "Helvetica");
        
        super.init(texture: defaultTexture, color: UIColor.whiteColor(), size: defaultTexture.size())
        userInteractionEnabled = true
        
        //Creating and adding a blank label, centered on the button
        self.label.verticalAlignmentMode = SKLabelVerticalAlignmentMode.Center;
        self.label.horizontalAlignmentMode = SKLabelHorizontalAlignmentMode.Center;
        addChild(self.label)
        
        // Adding this node as an empty layer. Without it the touch functions are not being called
        // The reason for this is unknown when this was implemented...?
        let bugFixLayerNode = SKSpriteNode(texture: nil, color: UIColor.clearColor(), size: defaultTexture.size())
        bugFixLayerNode.position = self.position
        addChild(bugFixLayerNode)
        
    }
    
    /**
     * Taking a target object and adding an action that is triggered by a button event.
     */
    func setButtonAction(target: AnyObject, triggerEvent event:FTButtonActionType, action:Selector) {
        
        switch (event) {
        case .TouchUpInside:
            targetTouchUpInside = target
            actionTouchUpInside = action
        case .TouchDown:
            targetTouchDown = target
            actionTouchDown = action
        case .TouchUp:
            targetTouchUp = target
            actionTouchUp = action
        }
        
    }
    
    /*
    New function for setting text. Calling function multiple times does
    not create a ton of new labels, just updates existing label.
    You can set the title, font type and font size with this function
    */
    
    func setButtonLabel(title: NSString, font: String, fontSize: CGFloat) {
        self.label.text = title as String
        self.label.fontSize = fontSize
        self.label.fontName = font
    }
    
    var disabledTexture: SKTexture?
    var actionTouchUpInside: Selector?
    var actionTouchUp: Selector?
    var actionTouchDown: Selector?
    weak var targetTouchUpInside: AnyObject?
    weak var targetTouchUp: AnyObject?
    weak var targetTouchDown: AnyObject?
    
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if (!isEnabled) {
            return
        }
        isSelected = true
        if (targetTouchDown != nil && targetTouchDown!.respondsToSelector(actionTouchDown!)) {
            UIApplication.sharedApplication().sendAction(actionTouchDown!, to: targetTouchDown, from: self, forEvent: nil)
        }
    }
    
    override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
        
        if (!isEnabled) {
            return
        }
        
        let touch: AnyObject! = touches.first
        let touchLocation = touch.locationInNode(parent!)
        
        if (CGRectContainsPoint(frame, touchLocation)) {
            isSelected = true
        } else {
            isSelected = false
        }
        
    }
    
    override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if (!isEnabled) {
            return
        }
        
        isSelected = false
        
        if (targetTouchUpInside != nil && targetTouchUpInside!.respondsToSelector(actionTouchUpInside!)) {
            let touch: AnyObject! = touches.first
            let touchLocation = touch.locationInNode(parent!)
            
            if (CGRectContainsPoint(frame, touchLocation) ) {
                UIApplication.sharedApplication().sendAction(actionTouchUpInside!, to: targetTouchUpInside, from: self, forEvent: nil)
            }
            
        }
        
        if (targetTouchUp != nil && targetTouchUp!.respondsToSelector(actionTouchUp!)) {
            UIApplication.sharedApplication().sendAction(actionTouchUp!, to: targetTouchUp, from: self, forEvent: nil)
        }
    }
    
}

It has a bug where I can't add three small buttons next to each other, when you touch the button that you want, it goes Im guessing to the one that has the bigger frame. I tried testing one by one and found out that when you touch outside of each button it would not work but the texture does change to the selectedTexture. and when you add up the 3 buttons because of the texture changing it wouldnt let me select the actual button i want to click. any suggestions?