坂道を使ってボールをとばして遊んで「はひふへほ」を覚えるiPhoneアプリを描いてみます。（SpriteKitを使いました。)
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>
#import <AVFoundation/AVFoundation.h>
@interface SlideScene : SKScene <SKPhysicsContactDelegate>
@property BOOL contentCreated;
@property (assign, nonatomic) int count;
@property NSMutableArray *mySounds;
@end
@implementation SlideScene
– (void)didMoveToView:(SKView *)view
{
if (!self.contentCreated) {
[self createSceneContents];
[self prepareToSounds];
self.contentCreated = YES;
self.physicsWorld.contactDelegate = self;
}
}
– (void)createSceneContents
{
self.backgroundColor = [UIColor whiteColor];
SKSpriteNode *ground = [SKSpriteNode spriteNodeWithColor:[SKColor greenColor] size:CGSizeMake(200, 10)];
ground.position = CGPointMake(100, 100);
ground.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:ground.size];
ground.physicsBody.dynamic = NO;
ground.name = @”slope”;
[self addChild:ground];
SKSpriteNode *stopper = [SKSpriteNode spriteNodeWithColor:[SKColor greenColor] size:CGSizeMake(10, 50)];
stopper.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:stopper.size];
stopper.physicsBody.dynamic = NO;
stopper.position = CGPointMake(-95, 20);
[ground addChild:stopper];
[self createBall];
[self createHole];
UIButton *play = [[UIButton alloc] initWithFrame:CGRectMake(10, 260, 50, 50)];
play.backgroundColor = [UIColor greenColor];
[play setTitle:@”→” forState:UIControlStateNormal];
play.titleLabel.font = [UIFont boldSystemFontOfSize:50];
[self.view addSubview:play];
[play addTarget:self action:@selector(play) forControlEvents:UIControlEventTouchUpInside];
UIButton *up = [[UIButton alloc] initWithFrame:CGRectMake(120, 260, 50, 50)];
up.backgroundColor = [UIColor greenColor];
[up setTitle:@”↑” forState:UIControlStateNormal];
up.titleLabel.font = [UIFont boldSystemFontOfSize:50];
[self.view addSubview:up];
[up addTarget:self action:@selector(up) forControlEvents:UIControlEventTouchUpInside];
}
– (void)createBall
{
SKShapeNode *ball = [[SKShapeNode alloc] init];
ball.path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-20, –20, 40, 40)].CGPath;
ball.strokeColor = [SKColor greenColor];
ball.position = CGPointMake(35, 130);
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:20];
ball.name = @”ball”;
ball.physicsBody.contactTestBitMask = 0x1 << 1;
[self addChild:ball];
}
– (void)createHole
{
NSArray *words = @[@”は“,@”ひ“,@”ふ“,@”へ“,@”ほ“];
for (int i=0; i<5; i++) {
float x = i * 70 + 250;
float y = 40;
UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(-30, –40, 10, 100)];
SKShapeNode *h = [[SKShapeNode alloc] init];
h.fillColor = [UIColor greenColor];
h.position = CGPointMake(x, y);
h.path = path.CGPath;
h.physicsBody = [SKPhysicsBody bodyWithEdgeChainFromPath:path.CGPath];
h.physicsBody.dynamic = NO;
[self addChild:h];
SKLabelNode *l = [[SKLabelNode alloc] init];
l.text = words[i];
l.fontSize = 40;
l.fontColor = [UIColor greenColor];
l.position = CGPointMake(x, y);
l.name = @”hiragana”;
l.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:20];
l.physicsBody.categoryBitMask = 0;
l.physicsBody.contactTestBitMask = 0x1;
l.physicsBody.dynamic = NO;
[self addChild:l];
}
}
– (void)play
{
SKNode *node = [self childNodeWithName:@”ball”];
int vx = arc4random() % 10 + 45;
[node.physicsBody applyImpulse:CGVectorMake(vx, 0)];
}
– (void)up
{
self.count = (self.count + 1) % 5;
SKNode *node = [self childNodeWithName:@”slope”];
node.zRotation = (M_PI/20.0)* self.count;
}
– (void)didBeginContact:(SKPhysicsContact *)contact
{
NSArray *nodes = @[contact.bodyA.node, contact.bodyB.node];
for (SKNode *node in nodes) {
if ([node.name isEqual:@”hiragana”]) {
[self sound:[(SKLabelNode*)node text]];
}
}
}
– (void)prepareToSounds
{
NSArray *names = @[@”ha”,@”hi”,@”fu”,@”he”,@”ho”];
self.mySounds = [[NSMutableArray alloc] init];
for (NSString *s in names) {
NSURL* musicFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:s ofType:@”m4a”]];
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
[player prepareToPlay];
[self.mySounds addObject:player];
}
}
– (void)sound:(NSString*)s
{
NSArray *kakiku = @[@”は“, @”ひ“, @”ふ“, @”へ“, @”ほ“];
NSUInteger i = [kakiku indexOfObject:s];
[(AVAudioPlayer*)self.mySounds[i] play];
}
– (void)didSimulatePhysics
{
SKNode *ball = [self childNodeWithName:@”ball”];
if (ball.position.y < –20) {
[ball removeFromParent];
[self createBall];
}
}
@end
@interface ViewController ()
@property (strong, nonatomic) SKView *spriteView;
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
self.spriteView = [[SKView alloc] initWithFrame:CGRectMake(0, 0, 568, 320)];
[self.view addSubview:self.spriteView];
SKScene *scene = [[SlideScene alloc] initWithSize:CGSizeMake(568, 320)];
[self.spriteView presentScene:scene];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end