Eduzan / Objective C
Objective-C Tutorial Roadmap
Worked examples are fully visible. Check-yourself items are study aids you can reveal one at a time.
What is Objective-C?
Objective-C is an object-oriented programming language that extends the C language with messaging and runtime features, widely used for macOS and iOS development before Swift.
Characteristics of Objective-C
- Object-oriented and dynamic
- Superset of the C programming language
- Message-passing syntax
- Powerful runtime system
- Seamless integration with C and C++
Data Types in Objective-C
- Primitive data types
- Derived data types
- User-defined data types
Variables
- Variable declaration and initialization
- Scope and lifetime of variables
Types of Operators
- Arithmetic operators
- Relational operators
- Logical operators
- Assignment operators
- Bitwise operators
Types of Loops
forloopwhileloopdo-whileloop- Nested loops
Defining and Calling Functions
- Function syntax
- Function declarations and definitions
Parameters and Return Values
- Passing arguments to functions
- Returning values
Function Pointers
- Understanding function pointers
- Use cases and examples
Introduction to Blocks
- What are blocks?
- Syntax of blocks
Types of Blocks
- Global blocks
- Stack blocks
- Heap blocks
Number Types
- Integer types
- Floating-point numbers
- NSNumber class
Working with Arrays
- Creating arrays
- Accessing and modifying array elements
Classes and Objects
- Syntax and keywords
- Types of classes
- Types of objects
Creating Subclasses
- Inheritance basics
Method Overriding
- Overriding parent class methods
- Using
superto access parent methods
Dynamic Typing and Polymorphism
- Dynamic method resolution
- Runtime polymorphism
Pointer Basics
- Understanding pointers
- NULL pointers
Pointer Operations
- Pointer arithmetic
- Array of pointers
- Pointer to pointer
Pointers and Functions
- Passing pointers to functions
- Returning pointers from functions
String Types
- C-style strings
- NSString and NSMutableString
Structures
- Defining and using structures
Pointers to Structures
- Accessing structure members using pointers
Preprocessors
- Macro definitions
- File inclusion
Types of Preprocessors
#define#include- Conditional compilation
Typedef Usage
- Creating aliases using
typedef
Typedef vs #define
- Key differences and use cases
Type Casting
- Implicit type casting
- Explicit type casting
Log Handling
- Using NSLog
- Debugging techniques
File Handling
- Reading from files
- Writing to files
Error Handling
- NSError and exception handling
Command Line Arguments
- Accessing arguments in Objective-C programs
- Practical examples
Types of Inheritance
- Single inheritance
- Multilevel inheritance
Encapsulation Concepts
- Access specifiers
- Data hiding and abstraction
Introduction to Categories
- Extending existing classes
Category Usage
- Adding methods without subclassing
Posing
- Understanding posing
- Types of posing
Class Extensions
- Private methods and properties
- Difference between categories and extensions
Dynamic Binding
- Runtime method binding
Use Cases
- Flexibility and dynamic behavior
Composite Objects
- Object composition
Types of Composite Objects
- Aggregation
- Composition
Introduction to Foundation Framework
- Core classes and utilities
Types and Subtypes
- Collections
- Strings
- Dates
- File management
Fast Enumeration
- Iterating collections efficiently
Memory Management Concepts
- Reference counting
- ARC (Automatic Reference Counting)
Best Practices
- Avoiding memory leaks
- Managing object lifecycles
End of lesson.