片手を上げる動作、全６枚の画像をパラパラアニメで表示するiPhoneアプリを作ってみる。
動作イメージ
XcodeからiOS7 iPhone Simulatorで動かすとこんな感じになります。
サンプルコード
#import “ViewController.h”
#import <SpriteKit/SpriteKit.h>
@interface ParaparaScene : SKScene
@property BOOL contentCreated;
@property NSArray *handupFrames;
@end
@implementation ParaparaScene
– (void)didMoveToView:(SKView *)view
{
if (!self.contentCreated) {
[self createSceneContents];
self.contentCreated = YES;
self.backgroundColor = [UIColor lightGrayColor];
}
}
– (void)createSceneContents
{
self.handupFrames = [self animationFramesForImageNamePrefix:@”lego” frameCount:6];
SKSpriteNode *sprite = [SKSpriteNode spriteNodeWithTexture:[self.handupFrames objectAtIndex:0]];
sprite.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
[self addChild:sprite];
SKAction *animationFramesAction = [SKAction animateWithTextures:self.handupFrames timePerFrame:0.2 resize:YES restore:NO];
[sprite runAction:[SKAction repeatActionForever:animationFramesAction]];
[self addDescription:@”flick book (SpriteKit)”];
}
– (NSArray *)animationFramesForImageNamePrefix:(NSString *)baseImageName frameCount:(NSInteger)count
{
NSMutableArray *arr = [NSMutableArray arrayWithCapacity:count];
for (int i=1; i<=count; i++) {
NSString *imageName = [NSString stringWithFormat:@”%@%d.png”, baseImageName, i];
SKTexture *t = [SKTexture textureWithImageNamed:imageName];
[arr addObject:t];
}
return arr;
}
– (void)addDescription:(NSString*)description
{
SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:@”Helvetica”];
myLabel.text = description;
myLabel.fontSize = 18;
myLabel.position = CGPointMake(160, 80);
[self addChild:myLabel];
}
@end
@interface ViewController ()
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:spriteView];
SKScene *scene = [[ParaparaScene alloc] initWithSize:CGSizeMake(320, 568)];
scene.scaleMode = SKSceneScaleModeAspectFit;
[spriteView presentScene:scene];
}
– (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end