This Objective-C Class Category on SKScene returns a Boolean value for whether a touch occurred within a specified Boundary

SKScene+DeterminingTouches.h

//
//  SKScene+DeterminingTouches.h
//  Space Platypus
//
//  Created by Andrew Paterson on 11/25/13.
//  Copyright (c) 2013 Andrew Paterson. All rights reserved.
//

#import <SpriteKit/SpriteKit.h>

@interface SKScene (DeterminingTouches)
- (BOOL)touch:(UITouch *)touch occuredWithinBoundaryMinimum:(CGPoint)boundaryMin
andBoundaryMaximum:(CGPoint)boundaryMax
andIsInclusiveOfEdgeLeft:(BOOL)leftEdge
        right:(BOOL)rightEdge
          top:(BOOL)topEdge
       bottom:(BOOL)bottomEdge;
@end

SKScene+DeterminingTouches.m

//
//  SKScene+DeterminingTouches.m
//  Space Platypus
//
//  Created by Andrew Paterson on 11/25/13.
//  Copyright (c) 2013 Andrew Paterson. All Rights Reserved.
//

#import "SKScene+DeterminingTouches.h"

/*
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 X------------------------------------
 
 (0,0) and (10, 10) cover the entire grid, because the minX = 0 and the maxX = 10; the minY = 0 and the maxY = 10;
 
 If any point is enter withing this grid, so long as all edges are included the result will be YES
 
 You may exclude any edge from the boundary, in such a way to create consecutive areas with neighboring borders, and
 should a touch land on the line between two button, it would be recognized by the one that has the edge included.
 Otherwise it will be recognized by the method run on the thread first. Such action can lead to unpredictable behavior, and so
 exclusion of the neighboring edge from one button and inclusion of it on the other is reccomended.
 
 */

@implementation SKScene (DeterminingTouches)
- (BOOL)touch:(UITouch *)touch occuredWithinBoundaryMinimum:(CGPoint)boundaryMin
                                         andBoundaryMaximum:(CGPoint)boundaryMax
                                   andIsInclusiveOfEdgeLeft:(BOOL)leftEdge
                                                      right:(BOOL)rightEdge
                                                        top:(BOOL)topEdge
                                                     bottom:(BOOL)bottomEdge{
    
    
    CGFloat maxX = 0;
    CGFloat minX = 0;
    CGFloat maxY = 0;
    CGFloat minY = 0;
    if (rightEdge) {
        maxX = boundaryMax.x;
    }
    else {
        maxX = boundaryMax.x - 0.001;
    }
    if (leftEdge) {
        minX = boundaryMin.x;
    }
    else {
        minX = boundaryMin.x + 0.001;
    }
    if (topEdge) {
        maxY = boundaryMax.y;
    }
    else {
        maxY = boundaryMax.x - 0.001;
    }
    if (bottomEdge) {
        minY = boundaryMin.y;
    }
    else {
        minY = boundaryMin.y + 0.001;
    }
    
    
    
    CGPoint touchPoint = [touch locationInNode:self];
    CGFloat xGrid = touchPoint.x;
    CGFloat yGrid = touchPoint.y;
    if (((xGrid >= minX) && (xGrid <= maxX)) && ((yGrid >= minY) && (yGrid <= maxY))) {
        return YES;
    }
    
    else{
        return NO;
    }
}



@end