sky-动画相关

https://www.jianshu.com/p/13c231b76594 解析 iOS 动画原理与实现
https://www.jianshu.com/p/412f71f8f2d1 一个发布界面动画效果的实现
https://www.jianshu.com/p/5d51f3522ca1 iOS中字迹动画效果
https://www.jianshu.com/p/97597719f0fa iOS UIVisualEffect 模糊动画的正确姿势
https://www.jianshu.com/p/658641c77f51 iOS复杂动画之抽丝剥茧（Objective-C & Swift）
https://www.jianshu.com/p/3891cb113892 仿写支付宝支付动画
https://www.jianshu.com/p/cd1bc0e82f4d iOS动画(一):拍电影与CABasicAnimation
https://www.jianshu.com/p/ca66dbc08b7f IOS 动画案例
https://www.jianshu.com/p/91b5cfad5d89 iOS 网络资源汇总之动画
https://www.jianshu.com/p/c99bea074aad iOS核心动画实现仿支付宝咻咻、雷达效果
*** https://www.jianshu.com/p/f6e147547fe0 iOS实践：通过核心动画完成过山车
https://www.jianshu.com/p/78e917f13f11【iOS_GitHub】购物车类的抛物线动画（支持上抛或者下抛） && 阻尼动画（弹球动画）
https://www.jianshu.com/p/acdd6d38cb8a iOS之UIView动画
https://www.jianshu.com/p/3a96cc95da5c iOS动画系列之二：带时分秒指针的时钟动画（下）
https://www.jianshu.com/p/29dc423a3845 动画必会 - 彻底理解position与anchorPoint（动画）
https://www.jianshu.com/p/26d3cddd191c 仿UC浏览器首页下拉动画及实现分析
https://www.jianshu.com/p/1cf3c003e14d 使用粒子动画,让你的APP下点儿雪
https://www.jianshu.com/p/cdcace43a86f iOS swift交互式转场动画
https://www.jianshu.com/p/45022427cf96 iOS用Sketch制作APP下拉刷新的GIF动画
https://www.jianshu.com/p/ee531b8d4089 iOS基础-动画效果的总结--(CALayer,CoreAnimation))
https://www.jianshu.com/p/e0e0d0ac7963 iOS酷炫切换动画实战分析
https://www.jianshu.com/p/77386607fd32 iOS动画指南 - 4.右拉的3D抽屉效果
https://www.jianshu.com/p/59ba5510cc26 从CoreAnimation到Pop
https://www.jianshu.com/p/0887aa418a7d iOS渐变圆环旋转动画CAShapeLayer CAGradientLayer