Скачать или смотреть iPhone Development Tutorial - 1 - Installing Xcode and the iPhone SDK

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iOS (previously iPhone OS) is a mobile operating system developed and circulated by Apple Inc.
Initially unveiled in 2007 for the I-phone, it's been expanded to guide other Apple devices like the Ipod Itouch (September 2007), iPad (January 2010), Ipadmini (November 2012) and 2nd-era Apple Television forth (September 2010). Unlike Google's Android and Microsoft's Windows Phone, Apple will not license iOS for setup on non-mac hardware.

By October 2013, Apple's Appstore featured more than one million iOS programs, 500,000 which were optimized for iPad. These programs have together been downloaded over 60 billion times. It'd a 2-1% share of the smart-phone mobile operating system units shipped in the fourth quarter of 2012, behind Google's Android. From the core of 2012, there were 410 million devices activated.

The graphical user interface of iOS is founded on the notion of direct manipulation, utilizing multi-contact gestures. Interface handle elements contain sliders, switches, and buttons. Interaction with the OS includes gestures including swipe, tap, pinch, and reverse pinch, which have specific definitions within the circumstance of the iOS operating-system and its own multi-touch interface.

Leading versions of iOS are released yearly. The current release, iOS 7, was launched on September 18, 2013. In iOS, there are four abstraction levels: Center OS level, the Core Services level, the Media stratum|the Media stratum, the Core Services layer, the Core OS level}, along with the Cocoa Touch layer|the Cocoa Touch level, the Core Services level, the Media layer, as well as the Center OS layer}. The current variant of the OS (iOS 7.0.6), dedicates 1-1.5 GB of the unit's flash memory for the program partition, using approximately 800 MB of that partition (fluctuating by product) for iOS itself. It works on the I-phone 4 and later, second-generation iPad and after, all models of the Ipadmini, as well as the 5th-generation iPod Touch.