Quick SKLabelNode-based button for Sprite Kit

example.m

SKLabelButton *button = [SKLabelButton initWithCallback:^{
    NSLog(@"touched");
}];

button.text = @"retry";
button.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
[self addChild:button];

SKLabelButton.h

#import <SpriteKit/SpriteKit.h>

@interface SKLabelButton : SKLabelNode

@property (copy, nonatomic) void (^callback)();
@property (strong, nonatomic) UIColor *mainColor;
@property (strong, nonatomic) UIColor *highlightColor;
@property (nonatomic) bool touchWasCancelled;

+(instancetype)initWithCallback:(void (^)())callback;

@end

SKLabelButton.m

#import "SKLabelButton.h"

@implementation SKLabelButton
@synthesize callback = _callback;
@synthesize highlightColor;
@synthesize mainColor;
@synthesize touchWasCancelled;

+(SKLabelButton *)initWithCallback:(void (^)())callback {
    SKLabelButton *button = [[SKLabelButton alloc] init];

    [button setCallback:callback];

    return button;
}

-(id)init {
    if (self = [super init]) {
        [self setUserInteractionEnabled:true];
        [self setHighlightColor:[UIColor yellowColor]];
    }
    
    return self;
}

-(void)highlight {
    [self setMainColor:self.fontColor];
    [self setFontColor:highlightColor];
}

-(void)dehighlight {
    [self setFontColor:mainColor];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    touchWasCancelled = false;

    [self highlight];
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    CGPoint location = [[touches anyObject] locationInNode:self.parent];
    
    if (!CGRectContainsPoint(self.frame, location)) {
        touchWasCancelled = true;
        [self dehighlight];
    }
}

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    [self dehighlight];

    if (touchWasCancelled) {
        return;
    }
    
    CGPoint location = [[touches anyObject] locationInNode:self.parent];
    
    if (CGRectContainsPoint(self.frame, location)) {
        _callback();
    }
}

@end