Adding a start and end screen in ios game - ios

Question

I am having trouble having my game begin paused so that the player has to press a button to start the game. I also have collision detection working, so when the two objects collide they just fall off of the screen. Here is my current code:
- (instancetype)initWithSize:(CGSize)size {
if (self = [super initWithSize:size]) {
self.physicsWorld.contactDelegate = self;
[self buildBackground];
[self startScrolling];
_firstPosition = CGPointMake(self.frame.size.width * 0.817f, self.frame.size.height * .40f);
_squirrelSprite = [SKSpriteNode spriteNodeWithImageNamed:#"squirrel"];
_squirrelSprite.position = _firstPosition;
_atFirstPosition = YES;
_squirrelSprite.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:10];
_squirrelSprite.physicsBody.categoryBitMask = squirrelHitCategory;
_squirrelSprite.physicsBody.contactTestBitMask = nutHitCategory;
_squirrelSprite.physicsBody.collisionBitMask = nutHitCategory;
_squirrelSprite.physicsBody.affectedByGravity = NO;
self.physicsWorld.contactDelegate = self;
[self addChild:_squirrelSprite];
// Declare SKAction that waits 2 seconds
SKAction *wait = [SKAction waitForDuration:3.0];
// Declare SKAction block to generate the sprites
SKAction *createSpriteBlock = [SKAction runBlock:^{
const BOOL isHeads = arc4random_uniform(100) < 50;
NSString* spriteName = isHeads ? #"lightnut.png" : #"darknut.png";
SKSpriteNode *nut = [SKSpriteNode spriteNodeWithImageNamed:spriteName];
BOOL heads = arc4random_uniform(100) < 50;
nut.position = (heads)? CGPointMake(257,600) : CGPointMake(50,600);
nut.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(200,160)];
nut.physicsBody.categoryBitMask = nutHitCategory;
nut.physicsBody.contactTestBitMask = squirrelHitCategory;
nut.physicsBody.collisionBitMask = squirrelHitCategory;
nut.physicsBody.affectedByGravity = NO;
self.physicsWorld.contactDelegate = self;
[self addChild: nut];
SKAction *moveNodeUp = [SKAction moveByX:0.0 y:-700.0 duration:1.3];
[nut runAction: moveNodeUp];
}];
// Combine the actions
SKAction *waitThenRunBlock = [SKAction sequence:#[wait,createSpriteBlock]];
// Lather, rinse, repeat
[self runAction:[SKAction repeatActionForever:waitThenRunBlock]];
}
return self;
}
My touchesBegan:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
if (_atFirstPosition)
{
SKAction *moveNodeLeft = [SKAction moveByX:-207.8 y:0.0 duration:0.85];
[_squirrelSprite runAction: moveNodeLeft withKey:#"moveleft"];
} else {
SKAction *moveNodeRight = [SKAction moveByX:207.8 y:0.0 duration:0.85];
[_squirrelSprite runAction: moveNodeRight withKey:#"moveright"];
}
_atFirstPosition = !_atFirstPosition;
_squirrelSprite.xScale *= -1.0;
}
Finally, my didBeginContact:
-(void)didBeginContact:(SKPhysicsContact *)contact
{
SKPhysicsBody *firstBody, *secondBody;
firstBody = contact.bodyA;
secondBody = contact.bodyB;
if(firstBody.categoryBitMask == squirrelHitCategory || secondBody.categoryBitMask == nutHitCategory)
{
}
}
I've been trying to figure this out for the last 2 weeks and I have read many tutorials and code to start the game with a simple start button and end screen, but nothing has worked. Any help is greatly appreciated!

Answer 1

I would use a navigation controller and have your start button on the root view and have that button push a viewcontroller that presents your game.