how can I create a menu screen for my spritekit game? - objective-c

Question

I already put my actual Gamescene inside the MyScene class. How can I create a menu screen even If I already put the game in the MyScene class. I tried to include the menu before the actual gamescene but that didnt work
-(id)initWithSize:(CGSize)size
{
if (self = [super initWithSize:size]) {
if (self = [super initWithSize:size]){
SKSpriteNode *startButton = [SKSpriteNode spriteNodeWithImageNamed:#"startButton"];
startButton.position = CGPointMake(160, 300);
startButton.size = CGSizeMake(200, 200);
startButton.name = #"startButton";
[self addChild:startButton];
}
return self;
/* Setup your scene here */
self.anchorPoint = CGPointMake(0.5, 0.5);
self.physicsWorld.contactDelegate = self;
//SKSpriteNode *bgImage = [SKSpriteNode spriteNodeWithImageNamed:#""];
//[self addChild:bgImage];
self.backgroundColor = [SKColor colorWithRed:0.171875 green:0.2421875 blue:0.3125 alpha:1.0];
world = [SKNode node];
[self addChild:world];
self.physicsWorld.contactDelegate = self;
generator = [SPWorldGenerator generatorWithWorld:world];
[self addChild:generator];
[generator populate];
hero = [SPHero hero];
[world addChild:hero];
[self loadScoreLabels];
cloud1 = [SPHero cloud1];
[world addChild:cloud1];
cloud2 = [SPHero cloud2];
[world addChild:cloud2];
cloud3 = [SPHero cloud3];
[world addChild:cloud3];
cloud4 = [SPHero cloud4];
[world addChild:cloud4];
//uihui//
SKLabelNode *tapToBeginLabel = [SKLabelNode labelNodeWithFontNamed:GAME_FONT];
tapToBeginLabel.name = #"tapToBeginLabel";
tapToBeginLabel.text = #"tap to begin";
tapToBeginLabel.fontSize = 20.0;
[self addChild:tapToBeginLabel];
[self animateWithPulse:tapToBeginLabel]; // ** GETS RESET LABEL PULSING ** //
// ** PULSING TEXT ** //
SKAction *disappear = [SKAction fadeAlphaTo:0.0 duration:0.6];
SKAction *appear = [SKAction fadeAlphaTo:1.0 duration:0.6];
SKAction *pulse = [SKAction sequence:#[disappear, appear]];
[tapToBeginLabel runAction:[SKAction repeatActionForever:pulse]];
// ** PULSING TEXT ** //
}
return self;
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInNode:self];
SKNode *node = [self nodeAtPoint:location];
if ([node.name isEqualToString:#"startButton"]) {
SKTransition *transition = [SKTransition doorsOpenVerticalWithDuration:1.0];
MyScene *game = [[MyScene alloc] initWithSize: CGSizeMake(self.size.width, self.size.height)];
[self.scene.view presentScene:game transition:transition];
}
}