introducing_ipad_apps_for_mac.md

WWDC19

Table of Contents

=================

• Introducing iPad Apps for Mac - Tuesday
  • Leverage Our Shared Technology Stack
    • When to Consider iPad Apps for Mac?
    • Goals
    • Things You Get for Free
    • Features to Adopt
    • Mouse and Touch Events
  • Unavailable APIs
  • API Availability
  • Conditionalizing Code
  • Bundle Format

Introducing iPad Apps for Mac - Tuesday

Session materials: https://developer.apple.com/videos/play/wwdc2019/205/

Leverage Our Shared Technology Stack

• Unified layers for AppKit apps and UIKit Apps like Core Graphics, Core Location, Foundation, lower level services etc.

When to Consider iPad Apps for Mac?

• Make iPad app available on the Mac

• Bring older Mac app to feature parity with iPad app

• Replace Mac app built on non-native technology

• Not all apps are candidates like iphone-only apps or apps that are built around mobile features

Goals

• Easy to get started
• One project, one source base, one target
• iPad app on the inside
• Mac app on the outside

Things You Get for Free

• Default Menu Bar with the menu items normally mac users expect
• Window management
• Dark mode compatibility
• Scroll behaviors
• Automatic mapping from iOS Settings app entries from the app to the mac app preferences
• Touch Bar
• Document pickers
• Custom views stay the same
• Text sizes: 17 pt default baseline for iOS apps is scaled to 13 pt
• Copy & paste
• Printing
• Multiple windows
• Application lifecycle

Features to Adopt

• Mac icon
• Custom menus
• Toolbars
• Touch bars

Mouse and Touch Events

• Hover with UIHoverGestureRecognizer
• Single-finger touch tracking
• Standard gestures
• Custom multi-touch codes are not automatically mapped to macOS and requires an alternative way when the app is being ported to the macOS

Unavailable APIs

• Deprecated frameworks
• iOS specific frameworks
  • Classkit
  • Healthkit
  • Homekit
• Hardware specific frameworks
• Framework differences
  • Core Location
    • Macs don't have GPS for example
  • Core Motion
    • No motion sensors on the mac
  • Media Player
    • No playback support
  • Metal
    • Some advanced metal features are not available

API Availability

• Defined by clear annotations

Conditionalizing Code

• Possible with static checks if available uiKitForMac

Bundle Format

• NSBundle will be adapting different hierarchies

• Various extensions are not available on macOS as expected