IOS Dev (49) official SpriteKit Game template of Apple

IOS Dev (49) official SpriteKit Game template of Apple

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• Basic Architecture

  -AppDelegate-ViewController: Basic VC. -MyScene: animation scenarios, processing actions, and so on.

  Instantiate a ViewController in AppDelegate and instantiate a MyScene in ViewController.

  AppDelegate

  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    self.window.rootViewController = [[ViewController alloc] init];       [self.window makeKeyAndVisible];    return YES;}

  ViewController

  - (void)loadView{    self.view = [[SKView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];}- (void)viewDidLoad{    [super viewDidLoad];    SKView * skView = (SKView *)self.view;    SKScene * scene = [MyScene sceneWithSize:skView.bounds.size];    scene.scaleMode = SKSceneScaleModeAspectFill;    [skView presentScene:scene];}

  This is easy to understand. Initialize the view in loadView. Remember to do this either in init or viewDidLoad.

  In viewDidLoad, first instantiate a MyScene and set this MyScene with scaleMode to SKSceneScaleModeAspectFill. At last, we will present the scene on The view.

  The above steps are common practices.

  MyScene

  -(id)initWithSize:(CGSize)size {        if (self = [super initWithSize:size]) {        self.backgroundColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];        SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@Chalkduster];        myLabel.text = @Hello, World!;        myLabel.fontSize = 30;        myLabel.position = CGPointMake(CGRectGetMidX(self.frame),                                       CGRectGetMidY(self.frame));        [self addChild:myLabel];    }    return self;}-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    /* Called when a touch begins */    for (UITouch *touch in touches) {        CGPoint location = [touch locationInNode:self];        SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithImageNamed:@Spaceship];        sprite.position = location;        SKAction *action = [SKAction rotateByAngle:M_PI duration:1];        [sprite runAction:[SKAction repeatActionForever:action]];        [self addChild:sprite];        NSLog(@for loop);    }    NSLog(@touchesBegan);}

  Implement the touchesBegan method, which is inherited by MyScene from UIResponder and defined:

  - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;

  The inheritance relationship is like this:

  MyScene -> SKScene -> SKEffectNode -> SKNode -> UIResponder

  Let's look back at touchesBegan.

  1. Obtain the touch point location first.
  2. Create a sprite using the spriteNodeWithImageNamed API.
  3. Set the sprite position.
  4. Create a SKAction and let sprite repeat the action.
  5. Finally, add this sprite to scene.

     Reprinted please indicate the blog from laruence: http://prevention.iteye.com