Lecture 10: Multithreading Demo Gestures

After demonstrating how to use multithreading to keep the downloading of a dragged and dropped background image from the internet from blocking the responsiveness of EmojiArt, lecture 10 of Stanford’s CS193p iOS Development course from Spring 2021 moves on to cover how to handle multitouch gestures. Pinch and drag gestures are added to EmojiArt to zoom in and pan around to see our “works of (emoji) art” in more glorious detail.