The wait is over, with the beta release of Xcode 6.2 and iOS 8.2 SDK, you can now begin development of applications for Apple Watch!
An application for Apple Watch consists of a WatchKit extension that runs on the iPhone as well as user interface resources that are installed on the Apple Watch.
“When your app is launched on Apple Watch, the WatchKit extension on iPhone runs in the background to update the user interface and respond to user interactions. WatchKit provides three opportunities to extend your iPhone app to Apple Watch: WatchKit apps, Glances, and actionable notifications.”
Video: Getting Started with WatchKit
Nate Cook does an excellent job detailing all the steps required for printing from an iOS device. This includes configuring the print job as well as the print options selectable by a user. The various properties of UIPrintInteractionController to format content prior to printing are also covered.
The post also includes both Swift and Objective-C code for all examples. This is a deep tutorial. Highly recommended.
Below you’ll find a collection of Objective-C macros, a reader submission (thank you):
// Degree to Radians
#define degreesToRadians(x) (M_PI * x / 180.0)
// Timer Invalidation
#define UA_invalidateTimer(t) [t invalidate]; t = nil;
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I’m as intrigued as David Smith when it comes to Apple Watch and the imminent release of the WatchKit API.
So to start with we will be given the ability to implement actionable notifications and glances. This is what I believe we are getting with the SDK release this month.
David has some interesting thoughts and speculation, this is a good read if you are considering an app for Apple Watch.