Creating iPhone Apps with Cocoa Touch The Mini Missing Manual-MANTESH.pdf

iPhone Apps

with Cocoa

Touch

Craig Hockenberry

Creating

Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual

by Craig Hockenberry

Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North,

Sebastopol, CA 95472.

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May 2010:

First Edition.

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are trademarks of O’Reilly Media, Inc. Many of the designations used by

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damages resulting from the use of the information contained in it.

ISBN: 9781449388409

Table of Contents

Introduction........................................................................................v

Building.Your.First.iPhone.App....................................................... 1

Getting the Tools.............................................................................................................................1

Installing Xcode.......................................................................................................................3

Getting the iPhone SDK.........................................................................................................6

What Lies Ahead for the SDK? ...........................................................................................11

Exploring Your New Tools ...........................................................................................................15

Every Flashlight Needs a Parts List ....................................................................................15

Some Assembly Required ................................................................................................... 21

Taking It for a Run on Your Mac.........................................................................................23

Revision Decision .................................................................................................................26

The.Power.of.Brackets.................................................................... 33

Objective-C: The Nuts and Bolts for Your iPhone App............................................................34

The Land of Square Brackets..............................................................................................34

The Object of It All........................................................................................................................36

Telling Your Objects to Do Things ......................................................................................37

Masses of Classes.........................................................................................................................39

Classes in Detail....................................................................................................................40

The Methods Behind the Madness ............................................................................................45

Categorically Speaking ........................................................................................................46

Implementation: The Brains Behind the Beauty..............................................................48

Creating New Classes ..................................................................................................................50

Managing Memory.......................................................................................................................53

Take a nil Pill ........................................................................................................................56

Autorelease with Ease .........................................................................................................58

Properties and Dots .............................................................................................................60

Methods of Class ..........................................................................................................................62

Initializing Objects ........................................................................................................................64

Deallocation Location ..........................................................................................................65

Loops: For Better or For Worse .................................................................................................66

Your Exceptional Code.................................................................................................................67

Learn by Crashing ................................................................................................................69

Selector Projector .........................................................................................................................73

Show Your id ...............................................................................................................................75

Where to Go from Here ..............................................................................................................79

Developer Documentation..................................................................................................80

Learn To Be Lazy ..................................................................................................................84

Cocoa.Touch:.Putting.Objective-C.to.Work.................................. 87

Get in Cocoa Touch ......................................................................................................................88

The Big Three: Models, Views, Controllers...............................................................................89

Views ......................................................................................................................................91

Models ...................................................................................................................................91

Controllers.............................................................................................................................92

Value Objects ................................................................................................................................94

Let’s Get Primitive ................................................................................................................95

Objectiied .............................................................................................................................96

Collections...................................................................................................................................100

Copying in Depth ...............................................................................................................102

Property Lists ......................................................................................................................102

Mutable vs. Immutable..............................................................................................................103

Make It Mutable .................................................................................................................104

Protect Your Data ...............................................................................................................106

Delegation and Data Sources ...................................................................................................107

Targets and Actions .................................................................................................................... 110

User Interface: The Hard Way .......................................................................................... 112

User Interface: The Easy Way ........................................................................................... 119

Notiications ................................................................................................................................135

Singletons ....................................................................................................................................139

Singletons as Globals ........................................................................................................140

Where to Go from Here ............................................................................................................142

The Language of Design....................................................................................................142

Colophon.........................................................................................143

Introduction

Since the iTunes App Store’s launch in July 2008, developers have

submitted over 100,000 iPhone applications to the store, resulting

in over 3 billion downloads and climbing. Who wouldn’t want a

piece of that action?

Before the app store was launched, iPhone app development was

limited to the engineers at Apple headquarters in Cupertino, Cali-

formia. Now that Apple has released the developer tools to anyone

who wants to download them, thousands of developers have

discovered how easy and fun it is to write software for the iPhone.

If you’ve done any programming in C or a related language like

C++, Java, PHP, or Perl, you can learn to write iPhone apps in a

snap. Objective-C will feel wonderfully familiar, since its entire

infrastructure is based on standard C.

In iPhone App Development: The Mini Missing Manual , you’ll create

your first iPhone app right from the get-go, and get up to speed

fast on all of your tools—Cocoa Touch, Interface Builder, Xcode,

and Objective-C.

Tip: There’s more to producing your own app than just writing

the code. This eBook is ideal if the Cocoa Touch programming

interface is all you want help with. For the full story on creating

and selling a successful app—designing, programming, trouble-

shooting, submitting, and marketing—check out iPhone App

Development: The Missing Manual . It covers everything in this

Mini Manual, plus the entire lifecycle of an iPhone app.

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