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By Adam Wulf on October 24, 2016
When I started working on Loose Leaf, I quickly realized that the hardest part of the app was finding a fast and efficient drawing UIView that I could add into my app. There were a fair number of tutorials that would solve the first 80%, but there was always some important pieces left as an exercise for the reader: Smooth curves, removing lag and stutter, or main-thread-blocking save/load.