iOS Development Tutorial - 12 - Segmented Controls

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iOS (formerly iPhone OS) is a handheld OS developed and propagated by Apple Inc.
Originally unveiled in 2007 for the I-phone, it is often extended to help other Apple devices such as the Ipodtouch (September 2007), iPad (January 2010), Ipadmini (November 2012) and second-generation Apple Television forth (September 2010). Unlike Google's Android and Microsoft's Win Phone, Apple does not license iOS for installing on non-Apple hardware.

As of October 2013, Apple's App Store comprised more than 1 million iOS applications, 500,000 which were optimized for I pad. These apps have collectively been downloaded over 60 billion times. It had a 21% share of the smart-phone mobile operating system units sent in the fourth quarter of 2012, behind Google's Android.

The interface of iOS is founded on the concept of immediate manipulation, utilizing multi-contact gestures. Interface control components contain sliders, switches, and buttons. Interaction with the OS includes gestures such as swipe, pat, pinch, and inverse pinch, all of which have special definitions within the specific context of its own multi-touch-interface and the iOS operating system.

Important variations of iOS are released per annum. The current release, iOS 7, was released on September 18, 2013. In iOS, there are four abstraction layers: Center OS layer, the Core Services level, the Media layer|the Media stratum, the Core Services layer, the Center OS layer}, and the Cocoa Touch layer|the Cocoa Touch layer, the Core Services layer, the Media level, as well as the Core OS level}. The current edition of the OS (iOS 7.0.6), dedicates 1-1.5 GB of the unit's flash memory for the program partition, utilizing about 800 MB of the partition (varying by design) for iOS it self. It runs on the I-phone 4 and later, second-generation iPad and later, all versions of the Ipadmini, and the fifth-generation iPod Contact.