スイカ割り

タップしてスイカ割りという感じでiPhoneアプリのサンプルコードを描いてみます。

#import “ViewController.h”

@import SpriteKit;

@interface SuikaScene : SKScene

@property (nonatomic) NSInteger count;

– (void)start;

@end

@implementation SuikaScene

– (void)didMoveToView:(SKView *)view

{

    self.backgroundColor = [SKColor brownColor];

    [self createAdviceMarks];

    [self createWaterMelon];

    [self createCover];

}

– (void)createAdviceMarks

{

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:15 startAngle:0 endAngle:2.0*M_PI clockwise:NO];

    for (int i=0; i<4; i++) {

        SKShapeNode *mark = [SKShapeNode node];

        mark.name = [NSString stringWithFormat:@”mark%d”, i];

        mark.path = path.CGPath;

        mark.lineWidth = 2;

        mark.strokeColor = [SKColor yellowColor];

        mark.fillColor = [SKColor whiteColor];

        mark.zPosition = 10;

        

        float x = 140 * cos(M_PI_2 * i) + 160;

        float y = 140 * sin(M_PI_2 * i) + 160;

        mark.position = CGPointMake(x, y);

        [self addChild:mark];

    }

}

– (void)createWaterMelon

{

    SKSpriteNode *melon = [SKSpriteNode spriteNodeWithImageNamed:@”watermelon”];

    melon.name = @”watermelon”;

    melon.position = CGPointMake(160, 160);

    [self addChild:melon];

}

– (void)createCover

{

    SKSpriteNode *cover = [SKSpriteNode spriteNodeWithColor:[SKColor blackColor] size:CGSizeMake(320, 320)];

    cover.name = @”cover”;

    cover.position = CGPointMake(160 + 320, 160);

    [self addChild:cover];

}

– (void)start

{

    SKNode *cover = [self childNodeWithName:@”cover”];

    SKAction *over = [SKAction moveTo:CGPointMake(160, 160) duration:0.5];

    [cover runAction:over completion:^{

        SKNode *melon = [self childNodeWithName:@”watermelon”];

        float x = 80 + arc4random() % 160;

        float y = 80 + arc4random() % 160;

        melon.position = CGPointMake(x, y);

    }];

}

– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    CGPoint p = [[touches anyObject] locationInNode:self];

    SKNode *melon = [self childNodeWithName:@”watermelon”];

    SKNode *cover = [self childNodeWithName:@”cover”];

    

    if ([melon containsPoint:p]) {

        // hit!!

        CGPoint mp = melon.position;

        [melon removeFromParent];

        SKSpriteNode *melonsplit = [SKSpriteNode spriteNodeWithImageNamed:@”watermelon_split”];

        melonsplit.position = mp;

        [self addChild:melonsplit];

        

        SKAction *uncover = [SKAction moveTo:CGPointMake(-160, 160) duration:0.5];

        [cover runAction:uncover];

    } else {

        // check left, right, top ,bottom

        float dx = p.x – melon.position.x;

        float dy = p.y – melon.position.y;

        

        SKNode *mark;

        if (fabs(dx) > fabs(dy)) {

            if (dx > 0)

                mark = [self childNodeWithName:@”mark2″];

            else

                mark = [self childNodeWithName:@”mark0″];

        } else {

            if (dy > 0)

                mark = [self childNodeWithName:@”mark3″];

            else

                mark = [self childNodeWithName:@”mark1″];

        }

        UIBezierPath *arcPath = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:14 startAngle:self.count * M_PI_2 endAngle:(self.count + 1) * M_PI_2 clockwise:YES];

        [arcPath addLineToPoint:CGPointZero];

        [arcPath closePath];

        SKShapeNode *arc = [SKShapeNode node];

        arc.path = arcPath.CGPath;

        arc.lineWidth = 0;

        arc.fillColor = [SKColor colorWithHue:0.2 * self.count saturation:0.9 brightness:0.8 alpha:1];

        [mark addChild:arc];

        

        self.count += 1;

    }

}

@end

@interface ViewController ()

@end

@implementation ViewController

– (void)viewDidLoad

{

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor greenColor];

    

    SKView *spriteView = [[SKView alloc] initWithFrame:CGRectMake(0, 0, 320, 320)];

    spriteView.translatesAutoresizingMaskIntoConstraints = NO;

    [self.view addSubview:spriteView];

    SKScene *scene = [[SuikaScene alloc] initWithSize:spriteView.frame.size];

    [spriteView presentScene:scene];

    

    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”|-0-[v(320)]” options:0 metrics:nil views:@{@”v”:spriteView}]];

    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”V:|-50-[v(320)]” options:0 metrics:nil views:@{@”v”:spriteView}]];

    

    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];

    [btn setTitle:@”start” forState:UIControlStateNormal];

    btn.titleLabel.font = [UIFont boldSystemFontOfSize:40];

    [btn sizeToFit];

    btn.translatesAutoresizingMaskIntoConstraints = NO;

    [self.view addSubview:btn];

    

    [btn addTarget:scene action:@selector(start) forControlEvents:UIControlEventTouchUpInside];

    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”|-80-[btn(160)]” options:0 metrics:nil views:@{@”btn”:btn}]];

    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@”V:[btn(40)]-50-|” options:0 metrics:nil views:@{@”btn”:btn}]];

}

@end