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What is Xcode, How Does it Look, How to use the Xcode tools and templates.
Lesson 2 How To Build iPad iPhone Apps iOS Xcode SDK Application Development Tutorials by Vineet Agarwal
iOS (previously iPhone OS) is a mobile operating system developed and propagated by Apple Inc.
Initially unveiled in 2007 for the I-phone, it is often extended to guide other Apple devices like the Ipod Itouch (September 2007), iPad (January 2010), iPad Mini (November 2012) and second-generation Apple TV forth (September 2010). Unlike Google’s Android and Microsoft’s Win Phone, Apple does not license iOS for setup on non-mac hardware.
As of October 2013, Apple’s Appstore comprised more than one million iOS applications, 500,000 of which were optimized for I-pad. These programs have together been downloaded more than 60 billion times. It had a 2-1% share of the smartphone mobile operating system units shipped in the fourth quarter of 2012, behind Google’s Android. By the heart of 2012, there were 410 million apparatuses activated. In Line With the specific media event held by Apple on September 12, 2012, 400-million apparatuses had been sold by June 2012.
The user-interface of iOS is founded on the concept of immediate manipulation, using multi-contact gestures. Interface manage elements consist of sliders, switches, and buttons. Interaction with the OS comprises gestures such as swipe, tap, emergency, and reverse pinch, which have unique definitions inside the circumstance of its own multi-touch interface and the iOS operating-system. Internal accelerometers are employed by some programs to reply to shaking the device (one typical result is the reverse command) or rotating it in three-dimensions (one common result is changing from portrait to landscape mode).
Leading versions of iOS are released yearly. The existing release, iOS 7, was released on September 18, 2013. In iOS, there are four abstraction levels: the Core Services layer, the Center OS level, the Media stratum|the Media layer, the Core Services layer, the Core OS layer}, and the Cocoa Touch layer|the Cocoa Touch level, the Core Services layer, the Media layer, and the Core OS level}. The present version of the operating system (iOS 7.0.6), dedicates 1-1.5 GB of the device’s flash-memory for the system partition, using about 800 MB of the partition (varying by design) for iOS itself. It works on the I-phone 4 and later, second-era iPad and later, all models of the Ipadmini, and the 5th-generation iPod Contact.