真ん中にある山からカードをひくiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
#import <SpriteKit/SpriteKit.h>
@interface DrawScene : SKScene
@property (nonatomic, weak) SKNode *selectedCard;
@property int counter;
@end
@implementation DrawScene
– (void)didMoveToView:(SKView *)view
{
self.backgroundColor = [UIColor greenColor];
[self createCards];
[self createDropArea];
}
– (void)createCards
{
float w = 40;
float h = w * 1.618;
CGPoint o = CGPointMake(160, 350);
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(-w/2.0, -h/2.0, w, h) cornerRadius:5];
for (int i=0; i<10; i++) {
float r = arc4random() % 60 + 30;
float x = r * cos(i * M_PI / 5) + o.x;
float y = r * sin(i * M_PI / 5) + o.y;
SKShapeNode *card = [SKShapeNode node];
card.position = CGPointMake(x, y);
card.name = [NSString stringWithFormat:@”card%d”,i];
card.path = path.CGPath;
card.lineWidth = 3;
card.fillColor = [SKColor grayColor];
card.zPosition = i + 1;
[self addChild:card];
}
}
– (void)createDropArea
{
UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(-50, –50, 100, 100) cornerRadius:10];
SKShapeNode *drop = [SKShapeNode node];
drop.name = @”drop area”;
drop.path = path.CGPath;
drop.lineWidth = 5;
drop.position = CGPointMake(160, 170);
drop.fillColor = [SKColor lightGrayColor];
[self addChild:drop];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
int max = 0;
for (SKNode *node in self.children) {
if ([[node.name substringToIndex:4] isEqual:@”card”] && [node containsPoint:p]) {
self.selectedCard = node;
}
if (max < node.zPosition) {
max = node.zPosition;
}
}
self.selectedCard.zPosition = max + 1;
}
– (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
self.selectedCard.position = p;
}
– (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
SKNode *dropArea = [self childNodeWithName:@”drop area”];
if (CGRectIntersectsRect(dropArea.frame, self.selectedCard.frame)) {
[self drawCard:self.selectedCard];
}
self.selectedCard = nil;
}
– (void)drawCard:(SKNode *)card
{
SKAction *flipA = [SKAction scaleXTo:0 duration:0.2];
SKAction *drawBack = [SKAction customActionWithDuration:0 actionBlock:^(SKNode *node, CGFloat elapsedTime) {
SKLabelNode *number = [SKLabelNode node];
number.text = [card.name substringFromIndex:4];
[(SKShapeNode *)node setFillColor:[SKColor colorWithWhite:0.8 alpha:1]];
[node addChild:number];
}];
SKAction *flipB = [SKAction scaleXTo:1.0 duration:0.2];
SKAction *wait = [SKAction waitForDuration:1.0];
float x = (self.counter % 5) * 50 + 50;
float y = (self.counter / 5) * (-40) + 70;
SKAction *move = [SKAction moveTo:CGPointMake(x, y) duration:0.5];
[card runAction:[SKAction sequence:@[flipA, drawBack, flipB, wait, move]]];
self.counter++;
}
@end
@interface ViewController ()
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:spriteView];
SKScene *scene = [[DrawScene alloc] initWithSize:spriteView.frame.size];
[spriteView presentScene:scene];
}
@end