INTUAnimationEngine makes it easy to build advanced custom animations on iOS.

INTUAnimationEngine provides a friendly interface to drive custom animations using a CADisplayLink, inspired by the UIView block-based animation API. It enables interactive animations (normally driven by user input, such as a pan or pinch gesture) to run automatically over a given duration. It can also be used to get a callback every frame of an animation.

INTUAnimationEngine includes an extensive library of easing functions that can be used to customize animation timing, as well as a complete library of interpolation functions to animate any type of value or property including those that are not animatable by Core Animation.

The project also includes a standalone spring physics library to simulate damped harmonic motion. This is used under the hood to power a spring animation API on INTUAnimationEngine that allows full control over the damping, stiffness, and mass parameters. Since the spring solver is a completely independent and generic library implemented in pure C, it can be used on its own for many other applications apart from animation.

License: MIT

INTUGroupedArray is an Objective-C data structure that takes the common one-dimensional array to the next dimension. The grouped array is designed with a familiar API to fit right in alongside Foundation collections like NSArray, with fully-featured immutable and mutable variants. A thin bridge brings the grouped array to Swift as native classes, where it harnesses the power, safety, and flexibility of generics, optionals, subscripts, literals, tuples, and much more.

INTUGroupedArray is extremely versatile, and can replace complicated nested arrays or combinations of other data structures as a general purpose data storage mechanism. The grouped array is ideal to use as a UITableView data source, as it is highly compatible with the data source and delegate callbacks -- requiring only a single line of code in many cases. However, it is suitable for use across the entire stack of iOS and OS X applications.

License: MIT

INTULocationManager

INTULocationManager makes it easy to get the device's current location on iOS. It is an Objective-C library that also works great in Swift.

INTULocationManager provides a block-based asynchronous API to request the current location, either once or continuously. It internally manages multiple simultaneous location requests, and each one-time request can specify its own desired accuracy level and timeout duration. INTULocationManager automatically starts location services when the first request comes in and stops location services as soon as all requests have been completed, all the while dynamically managing the power consumed by location services to reduce impact on battery life.

What's wrong with CLLocationManager?

CLLocationManager requires you to manually detect and handle things like permissions, stale/inaccurate locations, errors, and more. CLLocationManager uses a more traditional delegate pattern instead of the modern block-based callback pattern. And while it works fine to track changes in the user's location over time (such as for turn-by-turn navigation), it is extremely cumbersome to correctly request a single location update (such as to determine the user's current city to get a weather forecast, or to autofill an address from the current location).

INTULocationManager makes it easy to request the device's current location, either once or continuously. The API is extremely simple for both one-time location requests and recurring subscriptions to location updates. For one-time location requests, you can specify how accurate of a location you need, and how long you're willing to wait to get it. Significant location change monitoring is also supported. INTULocationManager is power efficient and conserves the device's battery by automatically determining and using the most efficient Core Location accuracy settings, and by automatically powering down location services (e.g. GPS) as soon as they are no longer needed.

License: MIT