MTAT.03.262

Mobile Application Development—

iOSPresented by Chii Chang

chang@ut.eehttp://math.ut.ee/~chang/

Outline

• Background of iOS

• How to start iOS application development

• Major development concepts

– (problems a beginner may face)

• Examples

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You might have seen

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http://en.wikipedia.org/wiki/Mobile_operating_system

Why iOS?

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Data source: https://www.netmarketshare.com (August 2014)

Mobile Web Browsing

Mobile Web Application

What is iOS?

• Previously—iPhone OS

• Unix-based operating system.Subset of Mac OS X.

• Multi-touch graphical user interface

• Current version: iOS 7.x / iOS 8

• iDevices: iPod, iPod Touch, iPhone, iPad etc.

• Security reason; Applications run individually, cannot interact with each other (iOS 7-)

– i.e. You cannot run a cheating program to cheat the game you are playing

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Application Programming Language

• Objective-C and Swift

• Objective-C (ObjC) from NeXT OS (Unix system); core

programming language for Mac OS X

• Swift:

– New programming language starts from 2014 for iOS

– “Objective-C without C”

– More information:

• “The Swift Programming Language” (iBooks; free)

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ObjC vs. Swift - Class

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ObjC

.h

.m

Swift

.swiftHeader

Method

Java, ObjC, Swift

• Java

java.lang.String gender = new String( “Male” );

orjava.lang.String gender = “Male” ;

• Objective-C

NSString * gender = [[NSString alloc] initWithString: @“Male” ];

orNSString * gender = @”Male” ;

• Swift

let gender = “Male”

orvar gender = “Male”

orvar gender: String? = “Male”

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// Constant; Cannot be changed

// Can be changed

Complier Environment Concept

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C++

ObjC

Swift

Java Virtual Machine

C

Swift has better performance

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Start Developing iOS App

What do you need?

• Mac OS 10.8+

• XCode IDE (iOS SDK included)

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Developer Program

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If you want to test your app on real device

Alternative Development Environment

• http://xamarin.com/platform

• Previous Mono Touch

• C#

• Write once, deploy on Android, iOS, Windows Phone

• Still requires a Mac computer

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XCode

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Main User Interface of Xcode

(Coding)

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Main User Interface of Xcode

(GUI Design)

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iDevice Simulator

• Simulator ≠ Emulator

• Simulator:

– Share hardware resources

– Subset of current OS

– Fast

• Emulator:

– Virtual machine

– Different OS

– Slow

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iPhone 4S Simulator

Debug Interface

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Storyboard

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Project Settings – Rename Project

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DEMO…

Project Settings – Import Libraries

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Project Settings - Flag

• Example, using GDataXML (of Gdata API)

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Project Settings – Search Path

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Project Settings – Individual Class

Setting (disable ARC)

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Disable “Automatic Reference Counting (ARC)”

Automatic Reference Counting (ARC)

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http://blog.teamtreehouse.com/ios-5-automatic-reference-counting-arc

Interesting Frameworks

• Mobile Web Server: CocoaHTTPServer

https://github.com/robbiehanson/CocoaHTTPServer

• GData Objective-C Cient https://code.google.com/p/gdata-objectivec-

client/

• RESTKit https://github.com/RestKit/RestKit

• AFNetworking https://github.com/AFNetworking/AFNetworking

• Game Development

– Cocos2D: http://www.cocos2d-swift.org/

– Cocos3D: http://brenwill.com/cocos3d/

• SPiCa, mobile device cloud computing

by Mobile & Cloud Lab

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Demo Applications-Simple Map App

-Simple Game

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Questions?

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