move tiles

ViewController.m

//
//  ViewController.m
//  MoveTiles
//
//  Created by MizushimaYusuke on 2017/02/19.
//  Copyright © 2017 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 createTiles];
}

- (void)setupScene {
    SKView *sv = [[SKView alloc] initWithFrame:self.view.bounds];
    SKScene *s = [SKScene sceneWithSize:sv.frame.size];
    [sv presentScene:s];
    [self.view addSubview:sv];
    self.scene = s;
}

- (void)createTiles {
    SKSpriteNode *base = [SKSpriteNode spriteNodeWithColor:[UIColor whiteColor] size:CGSizeMake(300, 300)];
    base.name = @"base";
    base.position = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));
    [self.scene addChild:base];
    
    [self create9:base];
}

- (void)create9:(SKNode*)node {
    if (node.frame.size.width < 100) {
        return;
    }
    
    for (int i=0; i<9; i++) {
        float d = node.frame.size.width / 3.0;
        float x = d * (i % 3) - d;
        float y = d * (i / 3) - d;
        SKShapeNode *tile = [SKShapeNode shapeNodeWithRect:CGRectMake(-d/2, -d/2, d, d) cornerRadius:5];
        tile.fillColor = [UIColor colorWithHue:0.1 * i saturation:0.6 brightness:1 alpha:0.6];
        tile.lineWidth = 0;
        tile.position = CGPointMake(x, y);
        [node addChild:tile];
        [self create9:tile];
        
    }
}

- (void)runPanel:(SKNode *)node {
    if (node.children.count < 1) {
        return;
    }
        
    for (int i=0; i<node.children.count; i++) {
        SKNode *n = node.children[i];
        
        int num = 0;
        if (n.position.x < 0) {
            if (n.position.y > 0) num = 7;
            if (n.position.y == 0) num = 6;
            if (n.position.y < 0) num = 3;
        } else if (n.position.x == 0) {
            if (n.position.y > 0) num = 8;
            if (n.position.y == 0) num = 4;
            if (n.position.y < 0) num = 0;
        } else if (n.position.x > 0) {
            if (n.position.y > 0) num = 5;
            if (n.position.y == 0) num = 2;
            if (n.position.y < 0) num = 1;
        }
        
        float d = node.frame.size.width / 3.0;
        float x1 = d * (num % 3) - d;
        float y1 = d * (num / 3) - d;
        [n runAction:[SKAction moveTo:CGPointMake(x1, y1) duration:2.0]];
        [self runPanel:n];
    }
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    SKNode *base = [self.scene childNodeWithName:@"base"];
    [self runPanel:base];
}

@end

http://lepetit-prince.net/ios/?p=6007