画面の端まできたらマップ切り替えるようなiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
@import SpriteKit;
@interface ViewController () <SKSceneDelegate>
@property (nonatomic, weak) SKScene *scene;
@property (nonatomic, strong) NSMutableArray *maps;
@property (nonatomic) int mapNo;
@property (nonatomic, weak) SKNode *currentMap;
@property (nonatomic) NSInteger direction;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor blackColor];
[self setup];
[self initMaps];
self.direction = –1;
[self showMap:self.mapNo direction:0];
[self createPlayer];
[self createButtons];
}
– (void)setup
{
float w = CGRectGetMaxX(self.view.bounds);
SKView *spriteView = [[SKView alloc] initWithFrame:CGRectMake(0, 0, w, w)];
spriteView.center = CGPointMake(CGRectGetMidX(self.view.frame), CGRectGetMidY(self.view.frame));
[self.view addSubview:spriteView];
SKScene *scene = [[SKScene alloc] initWithSize:spriteView.frame.size];
scene.physicsWorld.gravity = CGVectorMake(0, 0);
scene.backgroundColor = [UIColor colorWithRed:0.8 green:0.5 blue:0 alpha:1];
scene.delegate = self;
[spriteView presentScene:scene];
self.scene = scene;
}
– (void)initMaps
{
self.maps = [NSMutableArray array];
for (int i=0; i<9; i++) {
NSMutableArray *points = [NSMutableArray array];
for (int i=0; i<5; i++) {
int x = arc4random() % 7 + 2;
int y = arc4random() % 7 + 2;
[points addObject:[NSValue valueWithCGPoint:CGPointMake(x, y)]];
}
[self.maps addObject:points];
}
self.mapNo = 4;
}
– (void)showMap:(int)no direction:(int)direction
{
float w = CGRectGetMaxX(self.view.frame);
float bw = w / 10.0;
SKNode *map = [SKNode node];
[self.scene addChild:map];
for (NSValue *p in self.maps[self.mapNo]) {
SKSpriteNode *block = [SKSpriteNode spriteNodeWithColor:[SKColor brownColor] size:CGSizeMake(40, 40)];
block.position = CGPointMake(p.CGPointValue.x * bw, p.CGPointValue.y * bw);
[map addChild:block];
block.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:block.size];
block.physicsBody.dynamic = NO;
}
CGPoint move = CGPointZero;
CGPoint playerMove = CGPointZero;
SKNode *player = [self.scene childNodeWithName:@”player”];
switch (direction) {
case 1:
move = CGPointMake(w * 1.5, 0);
playerMove = CGPointMake(CGRectGetMaxX(self.view.bounds)-30, player.position.y);
break;
case 2:
move = CGPointMake(0, w * 1.5);
playerMove = CGPointMake(player.position.x, CGRectGetMaxX(self.view.bounds) – 30);
break;
case 3:
move = CGPointMake(-w * 1.5, 0);
playerMove = CGPointMake(30, player.position.y);
break;
case 4:
move = CGPointMake(0, -w * 1.5);
playerMove = CGPointMake(player.position.x, 30);
break;
default:
break;
}
map.position = CGPointMake(-move.x, -move.y);
[player runAction:[SKAction moveTo:playerMove duration:0.4]];
__block SKNode *old = self.currentMap;
[old runAction:[SKAction moveTo:move duration:0.5] completion:^{
[old removeFromParent];
}];
[map runAction:[SKAction moveTo:CGPointZero duration:0.5] completion:^{
self.currentMap = map;
self.scene.physicsWorld.speed = 1.0;
}];
}
– (void)createPlayer
{
float w = CGRectGetMaxX(self.view.frame) / 10.0;
SKSpriteNode *player = [SKSpriteNode spriteNodeWithColor:[SKColor redColor] size:CGSizeMake(w, w)];
player.name = @”player”;
player.position = CGPointMake(w/2.0, w/2.0);
[self.scene addChild:player];
player.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:player.size];
}
– (void)createButtons
{
CGPoint o = CGPointMake(CGRectGetMidX(self.view.frame), CGRectGetMaxY(self.view.bounds) – 60);
for (int i=0; i<4; i++) {
float x = 40 * cos(M_PI_2 * i) + o.x;
float y = 40 * sin(M_PI_2 * i) + o.y;
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.tag = i + 1;
btn.frame = CGRectMake(0, 0, 40, 40);
[btn setBackgroundColor:[UIColor lightGrayColor]];
btn.center = CGPointMake(x, y);
[self.view addSubview:btn];
[btn addTarget:self action:@selector(touchDownButton:) forControlEvents:UIControlEventTouchDown];
[btn addTarget:self action:@selector(touchUpButton:) forControlEvents:UIControlEventTouchUpInside | UIControlEventTouchDragExit | UIControlEventTouchUpOutside];
}
}
– (void)touchDownButton:(UIButton *)sender
{
self.direction = sender.tag;
}
– (void)touchUpButton:(UIButton *)sender
{
self.direction = 0;
}
– (void)update:(NSTimeInterval)currentTime forScene:(SKScene *)scene
{
SKNode *player = [self.scene childNodeWithName:@”player”];
switch (self.direction) {
case 0:
player.physicsBody.velocity = CGVectorMake(0, 0);
break;
case 1:
player.physicsBody.velocity = CGVectorMake(100, 0);
break;
case 2:
player.physicsBody.velocity = CGVectorMake(0, –100);
break;
case 3:
player.physicsBody.velocity = CGVectorMake(-100, 0);
break;
case 4:
player.physicsBody.velocity = CGVectorMake(0, 100);
break;
default:
break;
}
}
– (void)didSimulatePhysicsForScene:(SKScene *)scene
{
if (self.scene.physicsWorld.speed == 0) {
return;
}
SKNode *player = [self.scene childNodeWithName:@”player”];
float max = CGRectGetMaxX(self.view.bounds);
int nextMap = arc4random() % 10;
if (player.position.x < 0) {
self.scene.physicsWorld.speed = 0;
[self showMap:nextMap direction:1];
}
else if (player.position.x > max) {
self.scene.physicsWorld.speed = 0;
[self showMap:nextMap direction:3];
}
else if (player.position.y < 0) {
self.scene.physicsWorld.speed = 0;
[self showMap:nextMap direction:2];
}
else if (player.position.y > max) {
self.scene.physicsWorld.speed = 0;
[self showMap:nextMap direction:4];
}
}
– (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
@end