ゴミ箱スロー

ボールを弾ませて、上手くゴミ箱にいれてみようといった感じでiPhoneアプリのサンプルコードを描いてみます。

今回使った画像

動かすとこんな感じです

サンプルコード

#import “ViewController.h”

#import <SpriteKit/SpriteKit.h>

@interface DustScene : SKScene

@end

@implementation DustScene

– (void)didMoveToView:(SKView *)view

{

    [self createSceneContents];

}

– (void)createSceneContents

{

    [self createBoard];

    [self createBlocks];

    [self createDustBox];

    [self createDustBall];

}

– (void)createBoard

{

    SKSpriteNode *board = [SKSpriteNode spriteNodeWithColor:[SKColor lightGrayColor] size:self.size];

    board.name = @”board”;

    board.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));

    [self addChild:board];

    

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

    board.physicsBody.dynamic = NO;

    board.physicsBody.categoryBitMask = 0x1 << 2;

    board.physicsBody.collisionBitMask = 0x1 << 3;

}

– (void)createBlocks

{

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

    

    for (int i=0; i<10; i++) {

        float x = i * 50 + 25;

        float y = 50;

        UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(-24, –24, 48, 48) cornerRadius:3];

        SKShapeNode *block = [SKShapeNode node];

        block.name = @”block”;

        block.path = path.CGPath;

        block.position = CGPointMake(x, y);

        block.fillColor = [SKColor brownColor];

        [self addChild:block];

        

        block.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(45, 45)];

        block.physicsBody.categoryBitMask = 0x1 << 1;

        block.physicsBody.collisionBitMask = 0x1 << 1;

        block.physicsBody.allowsRotation = NO;

        

        SKPhysicsJointLimit *s1 = [SKPhysicsJointLimit jointWithBodyA:board.physicsBody bodyB:block.physicsBody anchorA:block.position anchorB:block.position];

        s1.maxLength = 20;

        [self.physicsWorld addJoint:s1];

    }

}

– (void)createDustBox

{

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

    

    SKSpriteNode *cover = [SKSpriteNode spriteNodeWithImageNamed:@”dustcover”];

    cover.name = @”cover”;

    cover.position = CGPointMake(CGRectGetMidX(self.frame), 200);

    [self addChild:cover];

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

    cover.physicsBody.categoryBitMask = 0x1 << 1;

    cover.physicsBody.collisionBitMask = 0x1 << 1;

    

    SKPhysicsJointSliding *sliding = [SKPhysicsJointSliding jointWithBodyA:cover.physicsBody bodyB:board.physicsBody anchor:cover.position axis:CGVectorMake(0, 1)];

    [self.physicsWorld addJoint:sliding];

    

    SKSpriteNode *box = [SKSpriteNode spriteNodeWithImageNamed:@”dustbox”];

    box.position = CGPointMake(CGRectGetMidX(self.frame), 120);

    [self addChild:box];

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

    box.physicsBody.categoryBitMask = 0x1 << 1;

    box.physicsBody.collisionBitMask = 0x1 << 1;

}

– (void)createDustBall

{

    float x = arc4random() % 100 + 20;

    SKSpriteNode *ball = [SKSpriteNode spriteNodeWithImageNamed:@”dust”];

    ball.name = @”ball”;

    ball.position = CGPointMake(x, 450);

    [self addChild:ball];

    

    ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:ball.size.width/2.0];

    ball.physicsBody.restitution = 0.3;

    ball.physicsBody.density = 0.1;

    ball.physicsBody.categoryBitMask = 0x1 << 1;

    ball.physicsBody.collisionBitMask = 0x1 << 1;

}

– (void)didSimulatePhysics

{

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

    if (ball.position.y < 0) {

        [ball removeFromParent];

        [self createDustBall];

    } else {

        ball.physicsBody.angularVelocity = –5;

    }

}

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

{

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

    

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

    

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

        if ([node containsPoint:p]) {

            [node.physicsBody applyImpulse:CGVectorMake(0, 50)];

            [cover.physicsBody applyImpulse:CGVectorMake(0, 150)];

        }

    }];

}

@end

@interface ViewController ()

@end

@implementation ViewController

– (void)viewDidAppear:(BOOL)animated

{

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

    [self.view addSubview:spriteView];

    

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

    [spriteView presentScene:scene];

}

@end