WWDC2019 Keynote
Summary
Curiously, this iOS platform does not seem to encompass Marzipan, sorry, i mean Project Catalyst — Apples effort to bring iPad apps to the Mac. Another curious mention that im intriguied to find ot more about is the 50% decrease in app download sizes and the (at least in Craigs wording on stage) related increase of 2x in startup speed. While SwiftUI was mentioned being for "all platforms", at this stage i am assiming that it sits on top of , and only comes to the mac via Catalyst, and not for traditional apps — well know more as the week goes on. SwiftUI is a combination of both a library/framework and a fancy new designer in Xcode that helps you "write"/adjust the UI code, and test it live both in an mebnedded simulator and on device — very nice. Remember, iOS was essentially branched of from macOS sometime before the Leopard days, and while the two OSs remain similar, the code bases have continued todiverge over time.