パンチメータ

パンチメダルをガンガンとばしてあそぶ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 PunchScene : SKScene

@property (nonatomic) float value;

@end

@implementation PunchScene

– (void)didMoveToView:(SKView *)view

{

    self.backgroundColor = [SKColor colorWithRed:0.7 green:0.7 blue:0.3 alpha:1];

    [self createMeter];

    [self createBall];

    [self createFist];

}

– (void)createMeter

{

    SKSpriteNode *meter = [SKSpriteNode spriteNodeWithColor:[SKColor colorWithRed:0 green:0.6 blue:0 alpha:1] size:CGSizeMake(260, 60)];

    meter.name = @”meter”;

    meter.position = CGPointMake(160, 400);

    [self addChild:meter];

    meter.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:meter.size];

    meter.physicsBody.dynamic = NO;

    

    SKShapeNode *arrow = [SKShapeNode node];

    arrow.name = @”arrow”;

    arrow.position = CGPointMake(30, meter.position.y);

    arrow.fillColor = [SKColor redColor];

    [self addChild:arrow];

    [self updateArrow];

}

– (void)updateArrow

{

    UIBezierPath *path = [UIBezierPath bezierPath];

    [path moveToPoint:CGPointMake(0, –20)];

    [path addLineToPoint:CGPointMake(self.value, –20)];

    [path addLineToPoint:CGPointMake(self.value + 10, 0)];

    [path addLineToPoint:CGPointMake(self.value, 20)];

    [path addLineToPoint:CGPointMake(0, 20)];

    [path closePath];

    

    SKShapeNode *arrow = (SKShapeNode *)[self childNodeWithName:@”arrow”];

    arrow.path = path.CGPath;

}

– (void)createBall

{

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:60 startAngle:0 endAngle:2.0*M_PI clockwise:NO];

    SKShapeNode *ball = [SKShapeNode node];

    ball.name = @”ball”;

    ball.path = path.CGPath;

    ball.fillColor = [SKColor colorWithRed:0.9 green:0 blue:0 alpha:1];

    ball.strokeColor = [SKColor colorWithRed:0.8 green:0 blue:0 alpha:1];

    ball.position = CGPointMake(160, 200);

    [self addChild:ball];

    

    ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:60];

    ball.physicsBody.density = 0.2;

    

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

    SKPhysicsJointLimit *limit = [SKPhysicsJointLimit jointWithBodyA:ball.physicsBody bodyB:meter.physicsBody anchorA:ball.position anchorB:meter.position];

    [self.physicsWorld addJoint:limit];

}

– (void)createFist

{

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:20 startAngle:0 endAngle:2.0*M_PI clockwise:NO];

    SKShapeNode *fist = [SKShapeNode node];

    fist.path = path.CGPath;

    fist.name = @”fist”;

    fist.position = CGPointMake(160, 50);

    fist.strokeColor = [SKColor redColor];

    float hue = (arc4random() % 10) * 0.1;

    fist.fillColor = [SKColor colorWithHue:hue saturation:0.6 brightness:0.7 alpha:1];

    [self addChild:fist];

    

    fist.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:20];

    fist.physicsBody.dynamic = NO;

    fist.physicsBody.categoryBitMask = 0x1;

    fist.physicsBody.collisionBitMask = 0x2;

    

    for (int i=0; i<5; i++) {

        CGPoint p = CGPointMake(i * 7 – 18, 2);

        CGSize size = CGSizeMake(5, 15);

        if (i == 0) {

            p = CGPointMake(-4, –10);

            size = CGSizeMake(11, 5);

        }

        SKSpriteNode *finger = [SKSpriteNode spriteNodeWithColor:[[SKColor whiteColor] colorWithAlphaComponent:0.5]  size:size];

        finger.position = p;

        [fist addChild:finger];

    }

}

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

{

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

    

    [self enumerateChildNodesWithName:@”fist” usingBlock:^(SKNode *fist, BOOL *stop) {

        if ([fist containsPoint:p] && fist.physicsBody.dynamic == NO) {

            fist.physicsBody.dynamic = YES;

            [fist.physicsBody applyImpulse:CGVectorMake(0, 60)];

            [self createFist];

            return;

        }

    }];

}

– (void)update:(NSTimeInterval)currentTime

{

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

    self.value = MAX(MAX(self.value – 3, 0), ball.physicsBody.velocity.dy / 3.0);

    [self updateArrow];

}

– (void)didSimulatePhysics

{

    [self enumerateChildNodesWithName:@”fist” usingBlock:^(SKNode *node, BOOL *stop) {

        if (node.position.y < 0) {

            [node removeFromParent];

        }

    }];

}

@end

@interface ViewController ()

@end

@implementation ViewController

– (void)viewDidLoad

{

    [super viewDidLoad];

    SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];

    [self.view addSubview:spriteView];

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

    [spriteView presentScene:scene];

}

@end