用于精灵动画的CAKeyframeAnimation

时间:2013-04-10 10:32:35

标签: core-animation calayer sprite-sheet cakeyframeanimation texturepacker

我正在尝试使用Core Animation为使用Texture Packer制作的精灵表制作动画。

我有一个带有我所有精灵内容的NSCollection。 (Keys和CGImageRef)

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设置动画:

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"];

但它不起作用,屏幕上没有任何反应。有什么建议?谢谢!

1 个答案:

答案 0 :(得分:1)

我的建议是“不要那样做”。您正在尝试实现一种技术,即精灵表,用于解决与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。核心动画的工作方式不同,因此在CA中实​​现精灵表动画并不合适。