WEB AGE TECHNOLOGY WEBINAR SERIES

iOS Development using Swift

Webinar Series WELCOME!

To ask a question during the presentation type it in the “Questions” section

Slides will be available shortly after the presentation Audio Recording will be published shortly after the presentation

Webinar Series JASON BELL

Webinar Series JASON BELL

Webinar Series UPCOMING CLASSES

iOS 10 Development with Swift June 26-30 goo.gl/oT0Z9W

Webinar Series AGENDA

Mobile Landscape and Development Options iOS Development Why Swift? Swift 4 and Xcode 9 Q & A

Webinar Series MOBILE LANDSCAPE

Webinar Series MOBILE LANDSCAPE

Webinar Series NATIVE ANDROID DEVELOPMENT

Language Java Kotlin Development Tool Android Studio

Webinar Series NATIVE IOS DEVELOPMENT

Language Swift Objective-C Development Tool Xcode AppCode (JetBrains)

Webinar Series CROSS-PLATFORM DEVELOPMENT

Web application Hybrid HTML-based cross-platform frameworks Apache Cordova / Adobe PhoneGap Native cross-platform frameworks Xamarin (C#) React Native (JavaScript) Appcelerator Titanium (JavaScript) Qt (C++)

Webinar Series CROSS-PLATFORM DEVELOPMENT (PROS)

Ability to more easily reuse code for multiple platforms Leverage existing language/framework knowledge

Webinar Series CROSS-PLATFORM DEVELOPMENT (CONS)

GUI components may still need to be coded multiple times to obtain a platform-specific look and feel Different platform design guidelines May not have access to all native functionality New native features may not be available right away Performance and offline functionality

Webinar Series LANGUAGES FOR IOS NATIVE DEVELOPMENT

Objective-C Original language for OS X and iOS development Still available and fully supported Swift Introduced by Apple in 2014 Released as open source in December of 2015 via swift.org The recommended choice for new app development Can interoperate with Objective-C code

Webinar Series FUTURE OF SWIFT

Many organizations outside of Apple have expressed interest in expanding the reach of Swift IBM – developer.ibm.com/swift Google Facebook and Uber – Have said they are considering making Swift "more central" to their operations Server-side web frameworks are appearing Perfect, Vapor, Kitura

Webinar Series SWIFT VERSIONS

Swift Version Release Date Xcode Version

1.0 September 2014 6.0

2.0 September 2015 7.0

3.0 September 2016 8.0

4.0 ? 9.0

Webinar Series DEVELOPMENT TOOLS

Xcode is Apple's Integrated Development Environment (IDE) Several device simulators are included with Xcode Instruments is a performance- analysis and testing tool

Webinar Series IOS SDK

The iOS SDK provides the resources you need to develop native iOS apps Most system interfaces are provided as frameworks Contains a dynamic shared library and associated resources Added to your Xcode project as needed

Webinar Series IOS SDK

The iOS SDK is grouped into layers Each layer provides an increasing level of abstraction Higher layers are object-oriented and typically easier to use Lower layers are primarily composed of functions implemented in C

Webinar Series IOS SDK

Webinar Series IOS SDK

Many frameworks within the SDK are grouped into smaller development kits that focus on specific functionality

Event Scene Sprite Cloud Health Home Kit Kit Kit Kit Kit Kit

Pass Push Store Web Map Watch Kit Kit Kit Kit Kit Kit

And more…

Webinar Series IOS SDK

Apple ID - Free Develop and test on a device Individual or Organization Membership - $99 App Store distribution TestFlight beta testing App analytics Enterprise Program - $299 In-house app distribution

Webinar Series SWIFT FEATURES

Modern Inferred typing, closures, tuples, generics, and more Safe Variables are always initialized before use Arrays and integers are checked for overflow Memory is managed automatically Fast Leveraging the LLVM compiler infrastructure, Swift code is transformed into optimized native code at compile time

Webinar Series SWIFT FEATURES

Interactive Playgrounds REPL debugging console Interoperable Designed to provide seamless compatibility with Objective-C Maintains compatibility with a number of C language types and features

Webinar Series SWIFT ENVIRONMENTS

Command Line Any text editor and the Swift compiler REPL (Read-Eval-Print-Loop) Xcode Swift playground iOS or OS X project Other IDE Jet Brains AppCode

Webinar Series SWIFT FROM THE COMMAND LINE

DEMO

Webinar Series SWIFT PLAYGROUNDS

Playgrounds in Xcode behave much like a REPL but have many additional features Interactive GUI Code completion Ability to display graphics Great way to experiment and learn about Swift

Webinar Series SWIFT PLAYGROUNDS

DEMO

Webinar Series SWIFT CONSTANTS AND VARIABLES

Swift encourages the use of constants whenever possible Using a constant has several advantages over a variable Provides a better expression of programmer intent Allows the compiler to employ optimizations Helps to avoid unwanted side effects

Webinar Series SWIFT CONSTANTS AND VARIABLES

DEMO

Webinar Series SWIFT OPTIONALS

By default, every constant and variable in Swift must have a value at all times (cannot represent nil or null) This promotes safety and helps eliminate a common source of errors However, an optional can be used in situations where a value may be absent

Webinar Series SWIFT OPTIONALS

DEMO

Webinar Series SWIFT INITIALIZATION

A method that is called automatically when an object is created is called an initializer Defined using the init keyword A default initializer is automatically provided for any class or structure that does not have an initializer defined Non-optional properties can be defined without an initial value as long as they are given a value within an initializer

Webinar Series SWIFT INITIALIZATION

All properties of an object (including those defined in a subclass) must be assigned a value during initialization To help ensure this, Swift defines two types of initializers: Designated Initializer Convenience Initializer

Webinar Series SWIFT INITIALIZATION

A designated initializer fully initializes all properties of the object Must call an initializer of the subclass if one exists

Webinar Series SWIFT INITIALIZATION

A convenience initializer is a secondary, supporting initializer for a class Must call another initializer within the same class Should be identified by using the convenience keyword

Webinar Series SWIFT INITIALIZATION

A designated initializer must call a designated initializer from its immediate superclass A convenience initializer must call another initializer from the same class A convenience initializer must ultimately call a designated initializer

Webinar Series SWIFT INITIALIZATION

Webinar Series SWIFT INITIALIZATION

Webinar Series SWIFT INITIALIZATION

Initializers are not inherited from a superclass except under specific conditions If your subclass doesn't define any designated initializers, it automatically inherits all of its superclass designated initializers If your subclass provides an implementation of all its superclass designated initializers then it automatically inherits all of its superclass convenience initializers

Webinar Series SWIFT INITIALIZATION

The Swift compiler performs other checks to make sure initialization is done properly, completely, and safely DI must ensure all properties introduced by its class are initialized before calling a superclass initializer DI must call a superclass initializer before assigning a value to an inherited property CI must call another initializer before assigning a value to any property

Webinar Series SWIFT 4 AND XCODE 9

At WWDC 2017, Apple made announcements related to Swift 4 and Xcode 9 Changes are less significant than the transition to Swift 3 Improvements to string data type Additional refinements around access modifiers Many improvements in the area of application size

Webinar Series SWIFT 4 AND XCODE 9

developer.apple.com/videos/wwdc2017 What's New in Swift

Webinar Series QUESTIONS? ?

Webinar Series CONTACT

Web Age Solutions www.webagesolutions.com/contactus/ US - 215-517-6540 Canada - 1-866-206-4644

Webinar Series