Lecture 8: Gestures JSON

in DTube • 6 years ago

Lecture 8 of Stanford’s iOS development course from Spring 2020 covers some persistence topics (UserDefaults API and JSON encoding/decoding) and the conceptual underpinnings of multi-touch gesture handling. We start adding these capabilities to EmojiArt by making its Model be convertible to/from JSON (using the Codable protocol) and then storing it (for now) in a lightweight storage vehicle. After that, pinch and drag gestures are added to EmojiArt to allow the user to zoom in and out and pan around in their document.

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6 years ago in DTube by
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