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我想要使用核心动画制作纹理包装器制作的精灵表。CAKeyframeAnimation雪碧动画

我有一个NSCollection与我所有的精灵内容。 (键和CGImageRef的)

My Collection { 
"caja01.png" = "<UIImage: 0x1cda57c0>"; 
"caja02.png" = "<UIImage: 0x1cda61d0>"; 
"caja03.png" = "<UIImage: 0x1cda62e0>"; 
"caja04.png" = "<UIImage: 0x1cda63f0>"; 
"caja05.png" = "<UIImage: 0x1cda6540>"; 
"caja06.png" = "<UIImage: 0x1cda6650>"; 
"caja07.png" = "<UIImage: 0x1cda6760>"; 
"caja08.png" = "<UIImage: 0x1cda68f0>"; 
} 

,我尝试使用CAKeyframeAnimation动画:

NSArray *values = [self.mySprites allValues]; // Get the CGImageRef's from NSDictionary 

// Creating a new layer 
CALayer *sublayer = [CALayer layer]; 
sublayer.backgroundColor = [UIColor blueColor].CGColor; 
sublayer.frame = imagen.frame; 
[self.view.layer addSublayer:sublayer]; 

// Create an first image from Sprite-sheet 
UIImageView *imagen = [[UIImageView alloc]initWithImage:[self.mySprites objectForKey:@"caja01.png"]]; 

// And add initial content to my layer 
sublayer.contents = (id) imagen.image.CGImage; 

// Try to make the animation 
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath: @"contents"]; 
animation.calculationMode = kCAAnimationDiscrete; 
animation.duration = 10.0; 
[animation setValues:values]; 
[animation setRepeatCount:2]; 
[animation setRemovedOnCompletion:NO]; 
[sublayer addAnimation: animation forKey: @"contents"]; 

但它不工作,没有任何反应在屏幕上。有什么建议么?谢谢!

+1

为什么不使用带有animationImages的UIImageView? – 2013-04-10 11:08:05

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哎唷!我不知道它存在!谢谢,我会调查;) – 2013-05-28 15:38:42

回答

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我的建议是“不要那样做”。您正试图实施一项技术,即精灵图表,以解决与Core Animation无关的问题。

精灵表的原因是处理OpenGL(和其他图形API)中的内存管理问题。核心动画工作方式不同,因此在CA中实​​施精灵表动画并不适合。

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谢谢。一些替代? – 2013-05-28 15:39:34