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watchOS 2

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Apple Watch • a watch • app extension(s) on your watch

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Apple Watch • the minimum of an app with apple watch • app • watch app • watch app extension • 3 separate app id

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Apple Watch • watch app • layout • watch app extension • logic

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watchOS 1 vs watchOS 2

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watchOS 1 vs watchOS 2 • iPhone <-> Apple Watch • watchOS 1 • os handled • + [openParentApplication:reply:] • watchOS 2 • Watch Connectivity Framework

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Watch Connectivity • background transfer • application context • user info • file

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Watch Connectivity • message • immediate • requires reachable • iPhone -> watch: BT connected + watch app foreground • watch -> iPhone: BT connected

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Watch Connectivity background transfer vs message

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Watch Connectivity • see : apple doc • see : http://www.kristinathai.com/watchos-2-how-to- communicate-between-devices-using-watch- connectivity/

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Complications

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watchOS 2 • time travel • animation • alpha • width / height • vertical / horizontal alignment • background color • layout group insets • more access to the hardware • new interface objects - WKInterfacePicker -> Digital Crown • see: apple doc or http://www.raywenderlich.com/108415/watchkit-for-watchos-2