This project is a tutorial on how to use the popular through Facebook framework. It is very easy and efficient framework that can help you make a decent movie in no time. In this project, you will find some simple demoes, they are not big demoes, but I assure you, they will help you grasp the frame. What is popular? Pop music is a scalable animation engine for iOS and OS X. In addition to basic animation including linear, easy in, slow procedures, slow type - Easy - out animation, which supports the spring (at the time of its release, the spring is not iOS support animation), decay and custom animation: Spring: dynamic animations created a nice bounce effect. Attenuation: Dynamic Animation brings motion smooth stop. Customization: Because the engine is designed to be scalable, you can create your own custom animation.