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Objective-C 2.0 Essentials

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<td width="20%"><td align="center">[[Objective-C 2.0 Essentials|Table of Contents]]<td width="20%" align="right">[[About Objective-C Essentials|Next]]</td>

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<td width="20%"><td align="center"><td width="20%" align="right">About Objective-C Essentials</td>

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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

== Table of Contents ==

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# [[About Objective-C Essentials]]

#* [[About Objective-C Essentials|Why are you reading this?]]

#* [[The History of Objective-C|The Smalltalk programming Language]]

#* [[The History of Objective-C|C meets Smalltalk]]

#* [[The History of Objective-C|Objective-C and Apple]] <htmlet>ezoictoc1</htmlet>

# [[Installing Xcode and Compiling Objective-C on Mac OS X]]

#* [[Installing Xcode and Compiling Objective-C on Mac OS X|Installing Xcode on Mac OS X]]

#* [[Objective-C 2.0 Data Types|double Data Type]]

#* [[Objective-C 2.0 Data Types|id Data Type]]

#* [[Objective-C 2.0 Data Types|BOOL Data Type]]

#* [[Objective-C 2.0 Data Types|Objective-C Data Type Qualifiers]]

#* [[Objective-C 2.0 Data Types|long]]

#* [[Objective-C 2.0 Data Types|long long]]

#* [[Objective-C 2.0 Data Types|short]]

#* [[Objective-C 2.0 Data Types|signed / unsigned]] <htmlet>ezoictoc2</htmlet>

# [[Working with Variables and Constants in Objective-C]]

#* [[Working with Variables and Constants in Objective-C|What is an Objective-C Variable]]

#* [[Working with Variables and Constants in Objective-C|Type Casting Objective-C Variables]]

# [[Objective-C Operators and Expressions]]

#* [[Objective-C Operators and Expressions|What is an Expression?]]

#* [[Objective-C Operators and Expressions|The Basic Assignment Operator]]

#* [[Objective-C Operators and Expressions|Objective-C Arithmetic Operators]]

#* [[Objective-C Operators and Expressions|Compound Assignment Operators]]

#* [[Objective-C Operators and Expressions|Increment and Decrement Operators]]

#* [[Objective-C Operators and Expressions|Comparison Operators]]

#* [[Objective-C Operators and Expressions|Boolean Logical Operators]]

#* [[Objective-C Operators and Expressions|The Ternary Operator]]

#* [[Objective-C Operators and Expressions|Bitwise Operators]]

#* [[Objective-C Operators and Expressions|Bitwise AND]]

#* [[Objective-C Operators and Expressions|Bitwise OR]]

#* [[Objective-C Operators and Expressions|Bitwise XOR]]

#* [[Objective-C Operators and Expressions|Bitwise Left Shift]]

#* [[Objective-C Operators and Expressions|Bitwise Right Shift]]

#* [[Objective-C Operators and Expressions|Compound Bitwise Operators]]

# [[Objective-C 2.0 Operator Precedence]]

#* [[Objective-C 2.0 Operator Precedence|An Example of Objective-C Operator Precedence]]

#* [[Objective-C 2.0 Operator Precedence|Objective-C Operator Precedence and Associativity]]

#* [[Objective-C 2.0 Operator Precedence|Overriding Operator Precedence]]

# [[Commenting Objective-C Code]]

#* [[Commenting Objective-C Code|Why Comment your Code?]]

#* [[Commenting Objective-C Code|Single Line Comments]]

#* [[Commenting Objective-C Code|Multi-line Comments]]

# [[Objective-C Flow Control with if and else]]

#* [[Objective-C Flow Control with if and else|Using the if Statement]]

#* [[Objective-C Flow Control with if and else|Using if ... else .. Statements]]

#* [[Objective-C Flow Control with if and else|Using if ... else if .. Statements]]

#* [[Objective-C Flow Control with if and else|Summary]]

# [[The Objective-C switch Statement]]

#* [[The Objective-C switch Statement|Why Use a switch Statement?]]

#* [[The Objective-C switch Statement|Using the switch Statement Syntax]]

#* [[The Objective-C switch Statement|A switch Statement Example]]

#* [[The Objective-C switch Statement|Explaining the Example]]

#* [[The Objective-C switch Statement|Combining case Statements]] <htmlet>ezoictoc3</htmlet>

# [[Objective-C Looping - The for Statement]]

#* [[Objective-C Looping - The for Statement|Why Use Loops?]]

#* [[Objective-C Looping - The for Statement|Objective-C Loop Variable Scope]]

#* [[Objective-C Looping - The for Statement|Creating an Infinite for Loop]]

#* [[Objective-C Looping - The for Statement|Breaking Out of a for Loop]]

#* [[Objective-C Looping - The for Statement|Nested for Loops]]

#* [[Objective-C Looping - The for Statement|Breaking from Nested Loops]]

#* [[Objective-C Looping - The for Statement|Continuing for Loops]]

#* [[Objective-C Looping - The for Statement|Using for Loops with Multiple Variables]]

# [[Objective-C Looping with do and while Statements]]

#* [[Objective-C Looping with do and while Statements|The Objective-C while Loop]]

#* [[Objective-C Looping with do and while Statements|Objective-C do ... while loops]]

#* [[Objective-C Looping with do and while Statements|Breaking from Loops]]

#* [[Objective-C Looping with do and while Statements|The continue Statement]]

# [[An Overview of Objective-C Object Oriented Programming]]

#* [[An Overview of Objective-C Object Oriented Programming|What is an Object?]]

#* [[An Overview of Objective-C Object Oriented Programming|What is a Class?]]

#* [[An Overview of Objective-C Object Oriented Programming|Declaring an Objective-C Class Implementation]]

#* [[An Overview of Objective-C Object Oriented Programming|Adding Instance Variables to a Class]]

#* [[An Overview of Objective-C Object Oriented Programming|Define Class Methods]]

#* [[An Overview of Objective-C Object Oriented Programming|Declaring an Objective-C Class Implementation]]

#* [[An Overview of Objective-C Object Oriented Programming|Declaring, Initializing and Releasing a Class Instance]]

#* [[An Overview of Objective-C Object Oriented Programming|Calling Methods and Accessing Instance Data]]

#* [[An Overview of Objective-C Object Oriented Programming|Creating the Program Section]]

#* [[An Overview of Objective-C Object Oriented Programming|Bringing it all Together]]

#* [[An Overview of Objective-C Object Oriented Programming|Structuring Object-Oriented Objective-C Code]]

# [[Writing Objective-C Class Methods]]

#* [[Writing Objective-C Class Methods|Instance and Class Methods]]

#* [[Writing Objective-C Class Methods|Creating a New Class Method]]

#* [[Writing Objective-C Class Methods|The @interface Section]]

#* [[Writing Objective-C Class Methods|The @implementation Section]]

#* [[Writing Objective-C Class Methods|The main() Function]]

# [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation]]

#* [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation|Data Encapsulation]]

#* [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation|Synthesized Accessor Methods]]

#* [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation|Direct Access to Encapsulated Data]]

#* [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation|Objective-C and Dot Notation]]

#* [[Objective-C - Data Encapsulation, Synthesized Accessors and Dot Notation|Controlling Access to Instance Variables]]

# [[Objective-C Inheritance]]

#* [[Objective-C Inheritance|Inheritance, Classes and Subclasses]]

#* [[Objective-C Inheritance|An Objective-C Inheritance Example]]

#* [[Objective-C Inheritance|Extending the Functionality of a Subclass]]

#* [[Objective-C Inheritance|Overriding Inherited Methods]]

# [[Pointers and Indirection in Objective-C]]

#* [[Pointers and Indirection in Objective-C|How Variables are Stored]]

#* [[Pointers and Indirection in Objective-C|An Overview of Indirection]]

#* [[Pointers and Indirection in Objective-C|Indirection and Objects]]

#* [[Pointers and Indirection in Objective-C|Indirection and Object Copying]]

# [[Objective-C Dynamic Binding and Typing with the id Type]]

#* [[Objective-C Dynamic Binding and Typing with the id Type|Static Typing vs Dynamic Typing]]

#* [[Objective-C Dynamic Binding and Typing with the id Type|Dynamic Binding]]

#* [[Objective-C Dynamic Binding and Typing with the id Type|Polymorphism]]

# [[Objective-C Variable Scope and Storage Class]]

#* [[Objective-C Variable Scope and Storage Class|Variable Scope]]

#* [[Objective-C Variable Scope and Storage Class|Block Scope]]

#* [[Objective-C Variable Scope and Storage Class|Function Scope]]

#* [[Objective-C Variable Scope and Storage Class|Global Scope]]

#* [[Objective-C Variable Scope and Storage Class|File Scope]]

#* [[Objective-C Variable Scope and Storage Class|Variable Storage Class]] <htmlet>ezoictoc4</htmlet>

# [[An Overview of Objective-C Functions]]

#* [[An Overview of Objective-C Functions|What is a Function?]]

#* [[An Overview of Objective-C Functions|How to Declare an Objective-C Function]]

#* [[An Overview of Objective-C Functions|Calling an Objective-C Function]]

#* [[An Overview of Objective-C Functions|Function Prototypes]]

#* [[An Overview of Objective-C Functions|Function Scope and the static Specifier]]

#* [[An Overview of Objective-C Functions|Static Variables in Functions]]

# [[Objective-C Enumerators]]

#* [[Objective-C Enumerators|Why Use Enumerators]]

#* [[Objective-C Enumerators|Declaring an Enumeration]]

#* [[Objective-C Enumerators|Creating and Using an Enumeration]]

#* [[Objective-C Enumerators|Enumerators and Variable Names]]

# [[An Overview of the Objective-C Foundation Framework]]

#* [[An Overview of the Objective-C Foundation Framework|The Foundation Framework]]

#* [[An Overview of the Objective-C Foundation Framework|Including the Foundation Headers]]

#* [[An Overview of the Objective-C Foundation Framework|Finding the Foundation Framework Documentation]]

# [[Working with String Objects in Objective-C]]

#* [[Working with String Objects in Objective-C|Strings without NSString]]

#* [[Working with String Objects in Objective-C|Declaring Constant String Objects]]

#* [[Working with String Objects in Objective-C|Creating Mutable and Immutable String Objects]]

#* [[Working with String Objects in Objective-C|Getting the Length of a String]]

#* [[Working with String Objects in Objective-C|Copying a String]]

#* [[Working with String Objects in Objective-C|Searching for a Substring]]

#* [[Working with String Objects in Objective-C|Replacing Parts of a String]]

#* [[Working with String Objects in Objective-C|String Search and Replace]]

#* [[Working with String Objects in Objective-C|Deleting Sections of a String]]

#* [[Working with String Objects in Objective-C|Extracting a Subsection of a String]]

#* [[Working with String Objects in Objective-C|Inserting Text into a String]]

#* [[Working with String Objects in Objective-C|Appending Text to the End of a String]]

#* [[Working with String Objects in Objective-C|Comparing Strings]]

#* [[Working with String Objects in Objective-C|Checking for String Prefixes and Suffixes]]

#* [[Working with String Objects in Objective-C|Converting to Upper or Lower Case]]

#* [[Working with String Objects in Objective-C|Converting Strings to Numbers]]

#* [[Working with String Objects in Objective-C|Converting a String Object to ASCII]]

# [[Understanding Objective-C Number Objects]]

#* [[Understanding Objective-C Number Objects|Creating and Initializing NSNumber Objects]]

#* [[Understanding Objective-C Number Objects|Getting the Value of a Number Object]]

#* [[Understanding Objective-C Number Objects|Comparing Number Objects]]

#* [[Understanding Objective-C Number Objects|Getting the Number Object Value as a String]]

# [[Working with Objective-C Array Objects]]

#* [[Working with Objective-C Array Objects|Mutable and Immutable Arrays]]

#* [[Working with Objective-C Array Objects|Creating an Array Object]]

#* [[Working with Objective-C Array Objects|Finding out the Number of Elements in an Array]]

#* [[Working with Objective-C Array Objects|Accessing the Elements of an Array object]]

#* [[Working with Objective-C Array Objects|Accessing Array Elements using Fast Enumeration]]

#* [[Working with Objective-C Array Objects|Adding Elements to an Array Object]]

#* [[Working with Objective-C Array Objects|Inserting Elements into an Array]]

#* [[Working with Objective-C Array Objects|Deleting Elements from an Array Object]]

#* [[Working with Objective-C Array Objects|Sorting Array Objects]]

# [[Objective-C Dictionary Objects]]

#* [[Objective-C Dictionary Objects|What are Dictionary Objects?]]

#* [[Objective-C Dictionary Objects|Creating Dictionary Objects]]

#* [[Objective-C Dictionary Objects|Initializing and Adding Entries to a Dictionary Object]]

#* [[Objective-C Dictionary Objects|Getting an Entry Count]]

#* [[Objective-C Dictionary Objects|Accessing Dictionary Entries]]

#* [[Objective-C Dictionary Objects|Removing Entries from a Dictionary Object]]

# [[Working with Directories in Objective-C]]

#* [[Working with Directories in Objective-C|The Objective-C NSFileManager, NSFileHandle and NSData Classes]]

#* [[Working with Directories in Objective-C|Understanding Pathnames in Objective-C]]

#* [[Working with Directories in Objective-C|Creating an NSFileManager Instance Object]]

#* [[Working with Directories in Objective-C|Identifying the Current Working Directory]]

#* [[Working with Directories in Objective-C|Changing to a Different Directory]]

#* [[Working with Directories in Objective-C|Creating a New Directory]]

#* [[Working with Directories in Objective-C|Deleting a Directory]]

#* [[Working with Directories in Objective-C|Renaming or Moving a Directory]]

#* [[Working with Directories in Objective-C|Getting a Directory File Listing]]

#* [[Working with Directories in Objective-C|Getting the Attributes of a File or Directory]]

# [[Working with Files in Objective-C]]

#* [[Working with Files in Objective-C|Creating an NSFileManager Instance]]

#* [[Working with Files in Objective-C|Checking if a File Exists]]

#* [[Working with Files in Objective-C|Comparing the Contents of Two Files]]

#* [[Working with Files in Objective-C|Checking if a File is Readable/Writable/Executable/Deletable]]

#* [[Working with Files in Objective-C|Moving/Renaming a File]]

#* [[Working with Files in Objective-C|Copying a File]]

#* [[Working with Files in Objective-C|Removing a File]]

#* [[Working with Files in Objective-C|Creating a Symbolic Link]]

#* [[Working with Files in Objective-C|Reading and Writing Files with NSFileManager]]

#* [[Working with Files in Objective-C|Working with Files using the NSFileHandle Class]]

#* [[Working with Files in Objective-C|Creating an NSFileHandle Object]]

#* [[Working with Files in Objective-C|NSFileHandle File Offsets and Seeking]]

#* [[Working with Files in Objective-C|Reading Data from a File]]

#* [[Working with Files in Objective-C|Writing Data to a File]]

#* [[Working with Files in Objective-C|Truncating a File]]

# [[Constructing and Manipulating Paths with NSPathUtilities]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|The Anatomy of a Path]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Finding a Temporary Directory]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Getting the Current User's Home Directory]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Getting the Home Directory of a Specified User]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Extracting the Filename from a Path]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Extracting the Filename Extension]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Standardizing a Path]]

#* [[Constructing and Manipulating Paths with NSPathUtilities|Extracting the Components of a Path]]

# [[Copying Objects in Objective-C]]

#* [[Copying Objects in Objective-C|Objects and Pointers]]

#* [[Copying Objects in Objective-C|Copying an Object in Objective-C using the <NSCopying> Protocol]]

#* [[Copying Objects in Objective-C|<NSCopying> Protocol and copyWithZone Method Implementation]]

#* [[Copying Objects in Objective-C|Performing a Deep Copy]]

# [[Using Objective-C Preprocessor Directives]]

#* [[Using Objective-C Preprocessor Directives|The #define Statement]]

#* [[Using Objective-C Preprocessor Directives|Creating Macros with the #define Statement]]

#* [[Using Objective-C Preprocessor Directives|Changing the Objective-C Language with #define]]

#* [[Using Objective-C Preprocessor Directives|Undefining a Definition with #undef]]

#* [[Using Objective-C Preprocessor Directives|Conditional Compilation]]

#* [[Using Objective-C Preprocessor Directives|The #import Directive]]

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<td width="20%"><td align="center">[[Objective-C 2.0 Essentials|Table of Contents]]<td width="20%" align="right">[[About Objective-C Essentials|Next]]</td>

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<td width="20%"><td align="center"><td width="20%" align="right">About Objective-C Essentials</td>

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