MTAT.03.262 Mobile Application Development

Development Primitives for iOS

Huber Flores huber@ut.ee

Tartu, Estonia, 2013 1

Outline

• Background

• iOS platform

– Requirements

– Technological specifications

• (architecture, programing models, etc.)

• Demo

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BACKGROUND

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What is iOS?

• Apple’s OS for iPhone – Launched 2007

– Core applications and services

• Direct manipulation concept – Multi-touch gestures (swipe, tap, pinch, and

reverse pinch)

• Application model based on online store (App store)

• Integration with iCloud (e.g. Siri, iTunes)

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iOS Architecture

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Physical layer

- Sensors Proximity, accelerometer, gyroscope, etc.

- Display

- CPU, memory, processors

- Network communication

- Battery

and so on… 5

iOS Architecture

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Core OS

- OS X Kernel

- Sockets

- Security

- Bonjour

- Certifications

- Power management

- BSD

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iOS Architecture

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Core services

- Collections

- Address book

- Core location

- Threading

- SQLite

- Networking

- File access

- URL utilities 7

iOS Architecture

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Media

- Core audio

- Open AL

- Audio mixing

- Audio recording

- Video playback

- Core animation

- OpenGL ES

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iOS Architecture

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Cocoa touch

- UIKit

- Foundation framework

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iOS Architecture

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iCloud

- SyncML iTunes, etc.

- Web services

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DEVELOPMENT PRIMITIVES

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Getting Acquaintance

• Mac OS X

• iPhone

• Apple developer ID

– Commercialization, service integration (e.g. Apple store, APNS)

• Xcode SDK

– Objective-C

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Xcode

• IDE for iOS development

– Design

– Implementation

– Execution (e.g. Device simulator)

– Debug

– Source code managment

– Documentation

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Xcode

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Xcode

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What is Objective-C

• ANSI C (superset)

• Enriches the language with OO capabilities

and more… (Dynamic binding and typing, etc.)

• GNU C

– Compiles both (C and Objective-C)

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Objective-C

• Objective-C

– iPhone

– Mac

• Java

– Almost everywhere… (with some tricks)

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Objective-C

• Message syntax

– Java:

myString.toString();

– Objective-C:

[myString description]

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Objective-C

• Method arguments

– Java:

Person.setFirstName("Raul");

– Objective-C:

[Person setFirstName:@"Raul"];

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Objective-C

• Object data types

– Java:

Person id = new Person();

– Objective-C:

Person *id = [[Person alloc] init];

Objetive-C also offers generic object type declaration

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Objective-C

• Libraries, packages and namespaces

– Java:

java.lang.String gender = new String("Male");

– Objective-C:

NSString *gender = [[NSString alloc]

initWithString:"Male"];

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Objective-C

• Methods – Java: public void setName(String firstName, String surName){…

– Objective-C: - (void) setName:(NSString *)firstName

lastName:(NSString *)surName

Call:

setName:lastName

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Objective-C

• Classes – Declared in .h file

– Implemented in .m file

• Compiler directives – @interface…. @end

– @implementation … @end

• Braces scope – Instance variable section inside curly braces

– Method defined outside curly braces

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Objective-C

• Class (Java)

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Objective-C

• Class

(declaration)

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Objective-C

• Class

(implementation)

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Basic Development Primitives

• Action

• Outlet

• Object binding

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DEMO

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QUESTIONS

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