调用SKLabelNode时延迟? [英] Delay when calling SKLabelNode?

问题描述

从一个SKScene转换到另一个SKScene时，我有一个稍微延迟(滞后)的问题.通过注释掉各种代码，我将其范围缩小到了SKLabelNode，我的猜测是这是它在调用时加载/缓存字体，这在陈述新的SKScene时导致较小的延迟/停顿.

I am having a problem with a slight delay (lag) when transitioning from one SKScene to another. By commenting out various bit of code I have narrowed this down to SKLabelNode, my guess is thats its loading / caching the font when called which is resulting in a small delay/stutter when stating up the new SKScene.

其他任何人都注意到了这一点，当您仅使用单个SKScene(如默认模板)时，这种情况就不太明显了，因为减速通常会在通常的启动延迟中丢失.有谁知道解决这个问题的方法，有没有办法预加载字体?我想我可以在启动时将字体加载到UIViewController上，看看是否可以通过SKScene来访问它，任何人有什么想法吗?

Has anyone else noticed this, its less obvious when your just using a single SKScene (like the default template) as the slowdown just gets lost in the usual startup delay. Does anyone know a way round this, is there a way to pre-load the font? I guess I could load the font on the UIViewController at startup and see if I could access it from with the SKScene, anyone any ideas?

-(id)initWithSize:(CGSize)size {
    if (self = [super initWithSize:size]) {
        [self setScore:0];

        [self setBackgroundColor:[SKColor blackColor]];
        SKLabelNode *labelNode = [SKLabelNode labelNodeWithFontNamed:@"System"];
        [labelNode setText:@"00000"];
        [labelNode setFontSize:20.0];
        [labelNode setPosition:CGPointMake(CGRectGetMidX(self.frame),500)];
        [labelNode setName:@"SCORE"];
        [labelNode setAlpha:1.0];
        [self addChild:labelNode];
        [self setScoreLabel:labelNode];
        ...

推荐答案

延迟是基于字体的加载.最好预先加载要使用的字体，声音和任何其他资源，以免第一次实际使用时出现延迟.

The delay is based on the loading of your font. Best to preload fonts, sounds, and any other assets you intend to use, so that you don't have a delay when it's actually used the first time.

您可以使用:

SKLabelNode *preload = [SKLabelNode labelNodeWithFontNamed:@"System"];
[preload setText:@"anything"]; 

如评论中所述，仅当使用无法通过iOS使用的字体时才需要预加载.

As noted in the comments, preloading is only needed when using a font that is not available via iOS.

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