wagara asa

ViewController.m

//
//  ViewController.m
//  WagaraAsa
//
//  Created by MizushimaYusuke on 7/15/16.
//  Copyright © 2016 MizushimaYusuke. All rights reserved.
//

#import "ViewController.h"
@import SpriteKit;

@interface ViewController ()
@property (nonatomic, weak) SKScene *scene;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupScene];
    [self createPattern];
}

- (void)setupScene {
    SKView *sv = [[SKView alloc] initWithFrame:self.view.bounds];
    SKScene *s = [SKScene sceneWithSize:sv.frame.size];
    s.backgroundColor = [UIColor colorWithHue:0 saturation:0.6 brightness:0.7 alpha:1];
    [sv presentScene:s];
    [self.view addSubview:sv];
    self.scene = s;
}

- (void)createPattern {
    for (int i=0; i<100; i++) {
        float x = (i % 10) * 40 * cos(M_PI / 6.0) + 30;
        float y = (i / 10) * 20 + 160;
        
        for (int j = 0; j<6; j++) {
            SKNode *node = [self createPart];
            node.position = CGPointMake(x, y);
            node.name = [NSString stringWithFormat:@"part %d", j];
        }
    }
}

- (SKNode *)createPart {
    float l = 20;
    CGPoint o = CGPointMake(l * cos(M_PI / 3.0) * 0.5, l * 0.5);
    CGPoint p1 = CGPointZero;
    CGPoint p2 = CGPointMake(0, l);
    CGPoint p3 = CGPointMake(l * cos(M_PI / 6.0), l * sin(M_PI / 6.0));
    
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:p1];
    [path addLineToPoint:p2];
    [path addLineToPoint:p3];
    [path closePath];
    [path moveToPoint:o];
    [path addLineToPoint:p1];
    [path moveToPoint:o];
    [path addLineToPoint:p2];
    [path moveToPoint:o];
    [path addLineToPoint:p3];
    
    path.lineWidth = 2;
    
    SKShapeNode *part = [SKShapeNode shapeNodeWithPath:path.CGPath];
    part.fillColor = [UIColor clearColor];
    part.strokeColor = [UIColor whiteColor];
    [self.scene addChild:part];

    part.position = CGPointMake(100, 100);
    
    return part;
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self.scene.children enumerateObjectsUsingBlock:^(SKNode * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        if ([obj.name hasPrefix:@"part"]) {
            int no = [[obj.name componentsSeparatedByString:@" "][1] intValue];
            [obj runAction:[SKAction rotateByAngle:no * M_PI / 3.0 duration:3.0]];
        }
    }];
}

@end

http://lepetit-prince.net/ios/?p=5316