.png动画spritekit性能下降

Question

我在我的项目中有一个.png动画，700张图片，大小为150 px x 150 px。

它工作正常，但每次动画开始，整个游戏冻结约0.1秒。像它的加载，但我在initWithSize中实现了.png数组。像这样：

SKTextureAtlas *barrierUfoAtlas = [SKTextureAtlas atlasNamed:@"BarrierUfoAnimation"]; 
NSArray *barrierUfoAtlasNames = [barrierUfoAtlas textureNames]; 
NSArray *sortetBarrierUfoAtlasNames = [barrierUfoAtlasNames sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)]; 
NSMutableArray *barrierUfoTextures = [NSMutableArray array]; 

for (NSString *filename in sortetBarrierUfoAtlasNames) { 
    SKTexture *texture = [barrierUfoAtlas textureNamed:filename]; 
    [barrierUfoTextures addObject:texture]; 
} 
self.barrierUfoAnimation = [SKAction animateWithTextures:barrierUfoTextures timePerFrame:0.024]; 

然后边玩边约1-2分钟。动画开始了。 现在不需要加载任何东西，只需启动动画即可。 有什么方法可以改进它？

Answer 1

这是很多方面预加载之一：

@implementation GameScene { 
SKTextureAtlas *myAtlas1; 
BOOL loadingComplete; 
} 

-(id)initWithSize:(CGSize)size { 
    if (self = [super initWithSize:size]) { 

    // the usual stuff... 

    loadingComplete = false; 
    [self loadMyAtlas1]; 
    } 

    return self; 
} 

-(void)loadMyAtlas1 { 
    myAtlas1 = [SKTextureAtlas atlasNamed:@"MyAtlasName"]; 
    [SKTextureAtlas preloadTextureAtlases:[NSArray arrayWithObject:myAtlas1] withCompletionHandler:^{ 
    [self finishedLoading]; 
    }]; 
} 

-(void)finishedLoading { 
    // other stuff you might do here 
    loadingComplete = true; 
} 

-(void)update:(CFTimeInterval)currentTime { 
    if(loadingComplete) { 
     // run game code 
    } else { 
     // wait for the water to boil 
    } 
}