足下に進んでくる棒（黒い四角）をジャンプでとびこえて遊ぶシンプルなゲームをiPhoneアプリとして描いてみます。(SpriteKit使ってます。)
動作イメージ
XcodeからiOS7 iPhone Simulatorで動かすとこんな感じになります。
サンプルコード
#import “ViewController.h”
#import <SpriteKit/SpriteKit.h>
@interface PlayGround : SKScene
@property BOOL contentCreated;
@property SKSpriteNode *bar;
@end
@implementation PlayGround
– (void)didMoveToView:(SKView *)view
{
if (!self.contentCreated) {
[self createSceneContents];
self.contentCreated = YES;
}
}
– (void)createSceneContents
{
self.scene.backgroundColor = [SKColor lightGrayColor];
[self createGround];
[self createBar];
[self createJumper];
}
– (void)createGround
{
SKSpriteNode *ground = [[SKSpriteNode alloc] initWithColor:[SKColor blackColor] size:CGSizeMake(568, 20)];
ground.position = CGPointMake(284, 0);
ground.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:ground.size];
ground.physicsBody.dynamic = NO;
ground.physicsBody.friction = 0;
[self addChild:ground];
}
– (void)createBar
{
self.bar = [[SKSpriteNode alloc] initWithColor:[SKColor blackColor] size:CGSizeMake(20, 20)];
self.bar.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:self.bar.size];
self.bar.position = CGPointMake(20, 20);
[self addChild:self.bar];
self.bar.physicsBody.friction = 0.0001;
}
– (void)createJumper
{
CGPoint points[] = {CGPointMake(120, 140), CGPointMake(180, 40), CGPointMake(250, 40), CGPointMake(350, 40)};
for (int i=0; i < 4; i++) {
SKSpriteNode *jumper = [SKSpriteNode spriteNodeWithColor:[SKColor redColor] size:CGSizeMake(20, 60)];
jumper.position = points[i];
jumper.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:jumper.size];
[self addChild:jumper];
jumper.name = @”jumper”;
}
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint touchPoint = [[touches anyObject] locationInNode:self];
for (SKNode *node in self.children) {
if ([node.name isEqual:@”jumper”]) {
if ([node containsPoint:touchPoint]) {
[node.physicsBody applyImpulse:CGVectorMake(0, 30)];
}
}
}
}
– (void)didSimulatePhysics
{
[self.bar.physicsBody applyImpulse:CGVectorMake(0.03, 0)];
if (self.bar.position.x > 548) {
self.bar.position = CGPointMake(0, self.bar.position.y);
}
SKNode *jumper = [self childNodeWithName:@”jumper”];
if (!jumper) {
[self createJumper];
} else {
if (jumper.position.y < 0) {
[jumper removeFromParent];
}
}
}
@end
@interface ViewController ()
@property (strong, nonatomic) UIView *bar;
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:CGRectMake(0, 0, 568, 320)];
[self.view addSubview:spriteView];
SKScene *scene = [[PlayGround alloc] initWithSize:CGSizeMake(568, 320)];
[spriteView presentScene:scene];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end