You should be using Core Animation.

你应该使用核心动画。

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Hopefully Core Animation will keep running during pan and zoom.

希望核心动画将保持平移和缩放在运行。

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Core Layer – XNA-based development for high-end graphics such as 3D animation or rendering with custom pixel shaders.

核心层——基于XNA的开发，针对像3D动画一样的高端图像，或者使用自定义像素着色器进行渲染。

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Animation is at its core a team effort, a collaboration between different fields (art, education, technology) and between people with very different ideas of what education means and what it ought to provide.

FORBES: The Animation Revolution

Shazam incorporated it into its core technology, improving its accuracy, and added a layer of animation and visualization to create a fun and engaging way to see the lyrics in real-time with the song.

ENGADGET: Shazam adds LyricPlay, lets you act like you knew the words to that song all along