1) iOS (previously iPhone OS) is a mobile operating system developed and distributed by Apple Inc.
2) Originally released in 2007 for the iPhone and iPod Touch, it has been extended to support other Apple devices such as the iPad and Apple TV.
3) Unlike Microsoft's Windows Phone (Windows CE) and Google's Android, Apple does not license iOS for installation on non-Apple hardware.
4) As of September 12, 2012, Apple's App Store contained more than 700,000 iOS applications, which have collectively been downloaded more than 30 billion times.
5) The user interface of iOS is based on the concept of direct manipulation, using multi-touch gestures.
6) Interface control elements consist of sliders, switches, and buttons.
7) Interaction with the OS includes gestures such as swipe, tap, pinch, and reverse pinch, all of which have specific definitions within the context of the iOS operating system and its multi-touch interface.
8) Internal accelerometers are used by some applications to respond to shaking the device (one common result is the undo command) or rotating it in three dimensions (one common result is switching from portrait to landscape mode).
DEVELOPMENT
9) On October 17, 2007, Steve Jobs announced that a software development kit (SDK) would be made available to third-party developers in February 2008. The SDK was released on March 6, 2008, and allows developers to make applications for the iPhone and iPod touch, as well as test them in an "iPhone simulator". However, loading an application onto the devices is only possible after paying an iPhone Developer Program fee.
10) Users can create and develop iOS Applications using a free copy of Xcode, however they cannot test their applications on a physical iOS device, post them to the App store or make profit from their applications without first paying the $99.00 iPhone Developer or Mac Developer Program fee.
11) Since the release of Xcode 3.1, Xcode is the development environment for the iOS SDK. iPhone applications, like iOS and OS X, are written in Objective-C.
STARTING XCODE 4.6
1) If you haven't got Xcode software in your Mac OSX, you can download from https://developer.apple.com/xcode/
2) Once it is installed, Xcode can be found in the Applications Directory. You can place Xcode at the dock for faster access.
3) If you run Xcode for the first time, it would look like below.
iOS Development: An Overview
1) iOS
2) Xcode + Objective-C + Nib + Storyboard
3) Developer License
4) Xcode IDE
5) Standard Steps and Wizards.
6) Project Categories and Types.7) Standard Components.
Continue to create first application
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