Swift coreanimation plus timer written by the game "aircraft Wars"

Recent learning of swift animations and layers. I wrote a game with the things that I learned, the basic functions of basic ideas have been realized. The pictures are all found on the Internet. Hope to help you better understand the animation and layers,

Statement, I was just beginning to learn the person, the code is not well written. Everyone should be able to read it. All the game code is swift plus animation plus timer, no matter what the game engine frame.

SOURCE Address: Click to open the link address is invalid, I can make up

Swift coreanimation plus timer written by the game "aircraft Wars"