This presentation is about- a)Core Syntax b)Structure c)Playgrounds,Variables,Constants,Print,Convert. d)IF,Switch,Loop e)Functions f)Complex Types g)Arrays h)Dictionary,Tuples,Optional,Enum,Closures. For more details visit - http://vibranttechnologies.co.in/ios-classes-in-mumbai.html

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Developing Apps for IOS

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The Basics
What is an app?
App is simply short for application. It is computer software
written for a specific user task.
What is IOS?
Originally iPhone Operating System, IOS is a mobile operating
system developed and distributed by Apple. It was released in
2007 for the iPhone and the iPod Touch. It was later extended
for the iPad and Apple TV.
Over 40% of smart phone subscribers use an Apple phone.
Current market share for smart phones:

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The Basics
Americans used smartphone and tablet apps more than PCs to
access the Internet in January, 2014 -- the first time that has ever
happened.
Mobile devices accounted for 55% of Internet usage in the United
States in January. Apps made up 47% of Internet traffic and 8% of
traffic came from mobile browsers. PCs clocked in at 45%.

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The Basics
What is Objective-C?
It is a high-level, object-oriented programming language. It is the main
language used for IOS and OS X application development.
What is Swift?
It is a multi-paradigm, compiled programming language developed by
Apple for iOS and OS X development. Introduced in 2014, Swift is
designed to work with Apple's Cocoa and Cocoa Touch frameworks
and the large body of existing Objective-C code written for Apple
products.
Swift is intended to be more resilient against erroneous code. It is
built with the LLVM compiler included in Xcode 6 beta, and uses the
Objective-C runtime, allowing Objective-C, Objective-C++ and
Swift code to run within a single program.

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The Basics
 What is Cocoa Touch?
It is the user interface (UI) framework for building IOS applications. It is based on
Cocoa, which is the application programming interface (API) for the Mac operating
system.
 What is Xcode?
It is an integrated development environment (IDE) containing a suite of software
development tools developed by Apple for developing software for OS X and iOS.
First released in 2003, the latest stable release is version 5.1 and is available via the
Mac App Store free of charge for Mac OS X Lion, OS X Mountain Lion and OS X
Mavericks users.
Registered developers can download preview releases and previous versions of the
suite through the Apple Developer website. Apple recently made a beta version of
version 6.x of the software available to those of the public with Apple Developer
accounts.

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Developing Mobile Apps
More differences between developing mobile apps and
standard software
IOS apps can read and write files in an area called a sandbox.
There is limited access to the rest of the device.
Programs need to open quickly and close down quickly. For
example, If your app takes more than 5 seconds to give up
control when the user hits the home button, the app may be
killed.
Conserving memory is important in writing apps. A device
(i.e., iPhone 4s, iPad 2) may have 512MB of RAM, but much of
that is used for the screen and by other system processes.

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Developing Mobile Apps
IOS devices have features that many Macs do not have:
Determining geographic coordinates
Built-in camera
Built-in accelerometer
To develop apps for IOS, you will need:
A Macintosh computer
Xcode software
To register as an Apple Developer

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Creating a simple “Hello World” app
1. Create a New Xcode Project
2. Choose IOS Application, Single View Application -> Next
3. Enter Hello World for the Product Name
4. Choose a location and then Create
5. Click on Main.Storyboard, the top of the View Controller, then Attributes (at the right). Change Size to
iPhone 4-inch and Orientation as Portrait
6. From the Object Library at the bottom right, choose and drag both a label and a button to your View
Controller
7. Close the Utilities window and click on the Assistant Editor
Control-Drag the label to right below the line that starts Class View…
Enter theLabel as its name
Modify the line of code if needed so that it says:
@IBOutlet var theLabel: UILabel?
(Note the question mark at the end.)
1. Control-Drag the button to below your outlet. When the popup occurs, choose Action as the Connection type
and give it a Name of theButton
2. In the function that was created, add this line between the braces:
theLabel?.hidden = true
1. Run your program using the simulator

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