问题 在Sprite Kit iOS中使用一个图像精灵表

感谢@ LearnCocos2D指点我使用 textureWithRect:inTexture: 我在自定义中创建了一个自定义init方法 Entity : SKSpriteNode 允许使用带有所有图像的精灵表的类。我试图包含一些注释来解释代码。我有这个版本扫描x，因为我的动画是水平的。只能使用调用的方法更改Y.不在此版本的方法中。

一定要把它放在界面中！

alloc-initing的示例：

Entity *cookie = [[Entity alloc] initWithSpriteSheetNamed:@"cookie_sheet" withinNode:map sourceRect:CGRectMake(0, 0, 32, 32) andNumberOfSprites:6];

实体中的方法：SKSpriteNode

- (id) initWithSpriteSheetNamed: (NSString *) spriteSheet withinNode: (SKSpriteNode *) scene sourceRect: (CGRect) source andNumberOfSprites: (int) numberOfSprites {

    // @param numberOfSprites - the number of sprite images to the left
    // @param scene - I add my sprite to a map node. Change it to a SKScene
    // if [self addChild:] is used.

    NSMutableArray *mAnimatingFrames = [NSMutableArray array];

    SKTexture  *ssTexture = [SKTexture textureWithImageNamed:spriteSheet];
    // Makes the sprite (ssTexture) stay pixelated:
    ssTexture.filteringMode = SKTextureFilteringNearest;

    float sx = source.origin.x;
    float sy = source.origin.y;
    float sWidth = source.size.width;
    float sHeight = source.size.height;

    // IMPORTANT: textureWithRect: uses 1 as 100% of the sprite.
    // This is why division from the original sprite is necessary.
    // Also why sx is incremented by a fraction.

    for (int i = 0; i < numberOfSprites; i++) {
        CGRect cutter = CGRectMake(sx, sy/ssTexture.size.width, sWidth/ssTexture.size.width, sHeight/ssTexture.size.height);
        SKTexture *temp = [SKTexture textureWithRect:cutter inTexture:ssTexture];
        [mAnimatingFrames addObject:temp];
        sx+=sWidth/ssTexture.size.width;
    }

    self = [Entity spriteNodeWithTexture:mAnimatingFrames[0]];

    animatingFrames = mAnimatingFrames;

    [scene addChild:self];

    return self;
}