ios - 改变 CCSprite 的图像会改变它的大小吗？

Question

我试图让 CCSprite 成为我的 iPod 音乐播放时的专辑插图 Sprite ，但问题是，当我将图像从 NoImage.png 更改为实际专辑插图时，CCSprite 似乎改变了大小和图像比原来的 CCSprite 小。老实说，我不明白为什么会这样，但也许其他人会这样!

无论如何，这是我如何在 init 方法中创建 CCSprite，

albumArtwork = [[[CCSprite alloc] initWithFile:@"NoImage.png"] autorelease];
        [albumArtwork setScaleX:159 / albumArtwork.contentSize.width];
        [albumArtwork setScaleY:139 / albumArtwork.contentSize.height];
        albumArtwork.position = ccp(320/2, 190);
        [self addChild:albumArtwork z:26];

然后当 iPod 音乐开始时，我这样做是为了将 CCSprite 图像从 NoImage.png 更改为 iPod 歌曲插图:

UIImage *albumArtworkImage = NULL;
    MPMediaItemArtwork *itemArtwork = [currentItem valueForProperty:MPMediaItemPropertyArtwork];
    if (itemArtwork != nil) {
        albumArtworkImage = [itemArtwork imageWithSize:CGSizeMake(albumArtwork.contentSize.width, albumArtwork.contentSize.width)];
    }

    if (albumArtworkImage) {
        CCTexture2D *tex = [[CCTextureCache sharedTextureCache] addCGImage:albumArtworkImage.CGImage forKey:@"albumArtwork"];
        [albumArtwork setTexture: tex];
    } else { // no album artwork
        CCTexture2D *tex = [[CCTextureCache sharedTextureCache] addImage:@"NoImage.png"];
        [albumArtwork setTexture:tex];
    }

有谁知道为什么会这样，如果是这样，我该如何解决？

编辑2: 这就是我将其浓缩为:

CCTexture2D *tex;
    MPMediaItemArtwork *itemArtwork = [currentItem valueForProperty:MPMediaItemPropertyArtwork];
    if (itemArtwork) {
        UIImage *albumArtworkImage = NULL;
        UIImage *firstImage = [itemArtwork imageWithSize:CGSizeMake(159.0f, 139.0f)];
        albumArtworkImage = [firstImage resizedImage:CGSizeMake(albumArtwork.contentSize.width, albumArtwork.contentSize.height) interpolationQuality: kCGInterpolationHigh];
        albumArtworkImage = [albumArtworkImage roundedCornerImage:8 borderSize:4]; 
        tex = [[CCTextureCache sharedTextureCache] addCGImage:albumArtworkImage.CGImage forKey:@"albumArtwork"];
    } else { // no album artwork
        tex = [[CCTextureCache sharedTextureCache] addImage:@"NoImage.png"];
    }
    [albumArtwork setTexture:tex];

Answer 1

 if (albumArtworkImage) {
    CCTexture2D *tex = [[CCTextureCache sharedTextureCache] addCGImage:albumArtworkImage.CGImage forKey:@"albumArtwork"];
    [albumArtwork setTexture: tex];
} else { // no album artwork
    CCTexture2D *tex = [[CCTextureCache sharedTextureCache] addImage:@"NoImage.png"];
    [albumArtwork setTexture:tex];
}
// reset visual size after you set new texture:
[albumArtwork setScaleX:159 / albumArtwork.contentSize.width];
[albumArtwork setScaleY:139 / albumArtwork.contentSize.height];

这意味着无论图像大小如何，您的 Sprite 始终会以 159x139 像素的大小呈现。