前端炫酷动画展示利器(lottie) 开发者关注 http://airbnb.io/lottie/ https://github.com/react-native-community/lottie-react-native https://www.lottiefiles.com/142-loading-animation 设计师关注 https://airbnb.io/lottie/after-effects/artwork-to-lottie-walkthrough.html