更改CCSprite的圖像會改變其大小？

我想讓CCSprite成爲我的iPod音樂播放時的專輯圖形精靈，但問題是，當我將圖像從NoImage.png更改爲實際專輯插圖時，CCSprite似乎會更改大小，並且圖像比原來的CCSprite小。我真的不明白爲什麼發生這種情況，但也許別人會！更改CCSprite的圖像會改變其大小？

反正這裏是我創建的init方法的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];

然後當iPod音樂開始我這樣做是爲了從NoImage.png的CCSprite圖像切換到iPod的歌曲作品：

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]; 
    }

有誰知道爲什麼會發生這種情況，如果是這樣，我該如何解決？

EDIT2：這就是我濃縮它歸結爲：

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];

來源

2012-01-17 iBrad Apps

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];

這意味着你的精靈總是將與大小獨立159x139像素渲染圖像的大小。

來源

2012-01-17 07:04:01 brigadir

看看我的Edit1，我沒有使用我應該的itemArtwork變量。您好像忽略了這一部分：P – 2012-01-17 12:27:08

我認爲它與MPMediaItemArtwork的關係不像他們在此線程中所說的那樣調整大小：http://stackoverflow.com/questions/7667631/mpmediaitemartwork-returning-wrong-sized-artwork 你知道我怎麼能把它調整到159,139嗎？謝謝！ – 2012-01-17 12:43:22

看看我的edit1 – 2012-01-17 23:07:36

更改CCSprite的圖像會改變其大小？

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