DAAnisotropicImage is an anisotropic UIImage generator. Specifically, for a metallic slider knob.
It was built to be an imitation of the volume slider thumb image in Apple's iOS 6.0 Music app.
View the included example project for a demonstration. It also demonstrates the CPU usage.
On June 12, 2012, Gizmodo wrote an article about an overlooked feature in the iOS 6.0 beta: a skeuomorphic metallic slider in the Music app.
You can see a YouTube video of the feature here.
The change was criticized by some as a waste of resources and developer time. This project is a demonstration of how quickly the feature can be replicated, and how (relatively) CPU-light it is. Ultimately, this feature uses between 10% and 20% of the CPU (mainly for drawing). Compare that to simply sliding a UISlider at about half that amount. Note that this usage is only relative to the CPU allocated to the app. Play music in the background and the CPU usage will remain constant, for example.
To use DAAnisotropicImage:
- Copy over the
DAAnisotropicImagefolder (and it's subfolder) to your project folder. - Make sure that your project includes the
CoreMotion.framework. - Call
-startAnisotropicUpdatesWithHandler:appropriately.
DAAnisotropicImage was made with ARC enabled by default.
If you use/enjoy DAAnisotropicImage, let me know!
Copyright (c) 2013 Daniel Amitay (http://www.danielamitay.com)
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