アルファベットをhexに変換する箱を表示するiPhoneアプリのサンプルコード
#import “ViewController.h”
#import <SpriteKit/SpriteKit.h>
@interface FunctionBoxScene : SKScene
@property (nonatomic, strong) SKNode *select;
@end
@implementation FunctionBoxScene
– (void)didMoveToView:(SKView *)view
{
self.backgroundColor = [SKColor purpleColor];
self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect:self.frame];
[self createFunctionBoxHex];
[self createBalls];
}
– (void)createFunctionBoxHex
{
SKSpriteNode *box = [SKSpriteNode spriteNodeWithColor:[SKColor blackColor] size:CGSizeMake(100, 100)];
box.name = @”box”;
box.position = CGPointMake(CGRectGetMidX(self.frame), 180);
box.zPosition = 10;
[self addChild:box];
box.physicsBody = [SKPhysicsBody bodyWithBodies:@[[SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(5, 100) center:CGPointMake(-48, 0)], [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(5, 100) center:CGPointMake(48, 0)]]];
box.physicsBody.dynamic = NO;
SKLabelNode *l = [SKLabelNode node];
l.text = @”hex”;
l.fontSize = 50;
l.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
[box addChild:l];
}
– (void)createBalls
{
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:20 startAngle:0 endAngle:2.0*M_PI clockwise:NO];
NSArray *word = [@”a b c d e f g h i j” componentsSeparatedByString:@” “];
for (int i=0; i<10; i++) {
SKShapeNode *ball = [SKShapeNode node];
ball.name = @”ball”;
ball.path = path.CGPath;
ball.position = CGPointMake(i * 20 + 20, 50 * (i % 2));
[self addChild:ball];
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:20];
SKLabelNode *l = [SKLabelNode node];
l.text = word[i];
l.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
[ball addChild:l];
}
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
[self enumerateChildNodesWithName:@”ball” usingBlock:^(SKNode *node, BOOL *stop) {
if ([node containsPoint:p]) {
self.select = node;
self.select.physicsBody.affectedByGravity = NO;
}
}];
}
– (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
self.select.position = p;
}
– (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
self.select.physicsBody.affectedByGravity = YES;
self.select = nil;
}
– (void)update:(NSTimeInterval)currentTime
{
SKNode *box = [self childNodeWithName:@”box”];
[self enumerateChildNodesWithName:@”ball” usingBlock:^(SKNode *node, BOOL *stop) {
if ([box containsPoint:node.position]) {
node.name = @”hex”;
SKLabelNode *l = node.children[0];
l.fontSize = 14;
l.text = [NSString stringWithFormat:@”0x%x”, [l.text UTF8String][0]];
}
}];
}
@end
@interface ViewController ()
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:spriteView];
SKScene *scene = [[FunctionBoxScene alloc] initWithSize:spriteView.frame.size];
[spriteView presentScene:scene];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end