In this tutorial -- Recreating Tumblr Compose Animations for iPhone with Proto.io --you will learn the following:
How to use states to effortlessly create professional quality animations
How to use the state timeline editor to control the precise timing of animations
How to use easings to achieve the bounce effect found in many popular apps
How to tweak opacity settings to achieve nuanced transparency effects
Note: This video demonstrates the particular features in the previous version of Proto.io.