Objective-C 2.0 Essentials

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		About Objective-C Essentials

The Objective-C 2.0 Essentials online book contains 34 chapters of detailed information intended to provide everything necessary to gain proficiency as an Objective-C programmer for both Mac OS X and iPhone development.

Objective-C 2.0 Essentials - Second Edition

About Objective-C Essentials
- Why are you reading this?
- Supported Platforms
The History of Objective-C
- The C Programming Language
- The Smalltalk programming Language
- C meets Smalltalk
- Objective-C and Apple
Installing Xcode and Compiling Objective-C on Mac OS X
- Installing Xcode on Mac OS X
- Starting Xcode
- Starting a New Project
- Writing an Objective-C Application with Xcode
- Compiling Objective-C from the Command Line
Installing and using GNUstep and Objective-C on Windows
- Downloading the GNUstep Packages
- Installing MinGW and GNUstep on Windows
- Running the GNUstep Shell
- Testing the Installation
Installing and Using GNUstep and Objective-C on Linux
- Installing GNUstep on Ubuntu
- Compiling Objective-C Code
Building and Installing GNUstep on Linux
- Installing gcc and Objective-C Support on Linux
- Package Dependencies
- Obtaining the GNUstep Source Code
- Configuring the Build Process
- Building GNUstep
- Testing the Objective-C and GNUstep Installation
- Compiling Objective-C Code
Objective-C 2.0 Data Types
- int Data Type
- char Data Type
- Special Characters/Escape Sequences
- float Data Type
- double Data Type
- id Data Type
- BOOL Data Type
- Objective-C Data Type Qualifiers
- long
- long long
- short
- signed / unsigned
Working with Variables and Constants in Objective-C
- What is an Objective-C Variable
- What is an Objective-C Constant?
- Type Casting Objective-C Variables
Objective-C Operators and Expressions
- What is an Expression?
- The Basic Assignment Operator
- Objective-C Arithmetic Operators
- Compound Assignment Operators
- Increment and Decrement Operators
- Comparison Operators
- Boolean Logical Operators
- The Ternary Operator
- Bitwise Operators
- Bitwise AND
- Bitwise OR
- Bitwise XOR
- Bitwise Left Shift
- Bitwise Right Shift
- Compound Bitwise Operators
Objective-C 2.0 Operator Precedence
- An Example of Objective-C Operator Precedence
- Objective-C Operator Precedence and Associativity
- Overriding Operator Precedence
Commenting Objective-C Code
- Why Comment your Code?
- Single Line Comments
- Multi-line Comments
Objective-C Flow Control with if and else
- Using the if Statement
- Using if ... else .. Statements
- Using if ... else if .. Statements
- Summary
The Objective-C switch Statement
- Why Use a switch Statement?
- Using the switch Statement Syntax
- A switch Statement Example
- Explaining the Example
- Combining case Statements
Objective-C Looping - The for Statement
- Why Use Loops?
- Objective-C Loop Variable Scope
- Creating an Infinite for Loop
- Breaking Out of a for Loop
- Nested for Loops
- Breaking from Nested Loops
- Continuing for Loops
- Using for Loops with Multiple Variables
Objective-C Looping with do and while Statements
- The Objective-C while Loop
- Objective-C do ... while loops
- Breaking from Loops
- The continue Statement
An Overview of Objective-C Object Oriented Programming
- What is an Object?
- What is a Class?
- Declaring an Objective-C Class Implementation
- Adding Instance Variables to a Class
- Define Class Methods
- Declaring an Objective-C Class Implementation
- Declaring, Initializing and Releasing a Class Instance
- Calling Methods and Accessing Instance Data
- Creating the Program Section
- Bringing it all Together
- Structuring Object-Oriented Objective-C Code
Writing Objective-C Class Methods
- Instance and Class Methods
- Creating a New Class Method
- The @interface Section
- The @implementation Section
- The main() Function
Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation
- Data Encapsulation
- Synthesized Accessor Methods
- Direct Access to Encapsulated Data
- Objective-C and Dot Notation
- Controlling Access to Instance Variables
Objective-C Inheritance
- Inheritance, Classes and Subclasses
- An Objective-C Inheritance Example
- Extending the Functionality of a Subclass
- Overriding Inherited Methods
Pointers and Indirection in Objective-C
- How Variables are Stored
- An Overview of Indirection
- Indirection and Objects
- Indirection and Object Copying
Objective-C Dynamic Binding and Typing with the id Type
- Static Typing vs Dynamic Typing
- Dynamic Binding
- Polymorphism
Objective-C Variable Scope and Storage Class
- Variable Scope
- Block Scope
- Function Scope
- Global Scope
- File Scope
- Variable Storage Class
An Overview of Objective-C Functions
- What is a Function?
- How to Declare an Objective-C Function
- Calling an Objective-C Function
- Function Prototypes
- Function Scope and the static Specifier
- Static Variables in Functions
Objective-C Enumerators
- Why Use Enumerators
- Declaring an Enumeration
- Creating and Using an Enumeration
- Enumerators and Variable Names
An Overview of the Objective-C Foundation Framework
- The Foundation Framework
- Including the Foundation Headers
- Finding the Foundation Framework Documentation
Working with String Objects in Objective-C
- Strings without NSString
- Declaring Constant String Objects
- Creating Mutable and Immutable String Objects
- Getting the Length of a String
- Copying a String
- Searching for a Substring
- Replacing Parts of a String
- String Search and Replace
- Deleting Sections of a String
- Extracting a Subsection of a String
- Inserting Text into a String
- Appending Text to the End of a String
- Comparing Strings
- Checking for String Prefixes and Suffixes
- Converting to Upper or Lower Case
- Converting Strings to Numbers
- Converting a String Object to ASCII
Understanding Objective-C Number Objects
- Creating and Initializing NSNumber Objects
- Getting the Value of a Number Object
- Comparing Number Objects
- Getting the Number Object Value as a String
Working with Objective-C Array Objects
- Mutable and Immutable Arrays
- Creating an Array Object
- Finding out the Number of Elements in an Array
- Accessing the Elements of an Array object
- Accessing Array Elements using Fast Enumeration
- Adding Elements to an Array Object
- Inserting Elements into an Array
- Deleting Elements from an Array Object
- Sorting Array Objects
Objective-C Dictionary Objects
- What are Dictionary Objects?
- Creating Dictionary Objects
- Initializing and Adding Entries to a Dictionary Object
- Getting an Entry Count
- Accessing Dictionary Entries
- Removing Entries from a Dictionary Object
Working with Directories in Objective-C
- The Objective-C NSFileManager, NSFileHandle and NSData Classes
- Understanding Pathnames in Objective-C
- Creating an NSFileManager Instance Object
- Identifying the Current Working Directory
- Changing to a Different Directory
- Creating a New Directory
- Deleting a Directory
- Renaming or Moving a Directory
- Getting a Directory File Listing
- Getting the Attributes of a File or Directory
Working with Files in Objective-C
- Creating an NSFileManager Instance
- Checking if a File Exists
- Comparing the Contents of Two Files
- Checking if a File is Readable/Writable/Executable/Deletable
- Moving/Renaming a File
- Copying a File
- Removing a File
- Creating a Symbolic Link
- Reading and Writing Files with NSFileManager
- Working with Files using the NSFileHandle Class
- Creating an NSFileHandle Object
- NSFileHandle File Offsets and Seeking
- Reading Data from a File
- Writing Data to a File
- Truncating a File
Constructing and Manipulating Paths with NSPathUtilities
- The Anatomy of a Path
- Finding a Temporary Directory
- Getting the Current User's Home Directory
- Getting the Home Directory of a Specified User
- Extracting the Filename from a Path
- Extracting the Filename Extension
- Standardizing a Path
- Extracting the Components of a Path
Copying Objects in Objective-C
- Objects and Pointers
- Copying an Object in Objective-C using the <NSCopying> Protocol
- <NSCopying> Protocol and copyWithZone Method Implementation
- Performing a Deep Copy
Using Objective-C Preprocessor Directives
- The #define Statement
- Creating Macros with the #define Statement
- Changing the Objective-C Language with #define
- Undefining a Definition with #undef
- Conditional Compilation
- The #import Directive

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