界面流畅探究

https://blog.ibireme.com/2015/11/12/smooth_user_interfaces_for_ios/

https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/Introduction/Introduction.html#//apple_ref/doc/uid/TP30001066?language=objc

https://blog.csdn.net/hopedark/article/details/50174157

https://mp.weixin.qq.com/s/ZpwMCHIGPZviMyXiDWR_0g

https://github.com/skyming/iOS-Performance-Optimization