Learn OBJECTIVE-C with Real Code Examples

Install Xcode from the Mac App Store

Set up command-line tools via Xcode preferences

Create a new Objective-C project or integrate into existing projects

Ensure proper SDK selection for target macOS/iOS versions

Build and run sample applications in Xcode simulator or device

Install Xcode from Mac App Store

Set command-line tools via Xcode preferences

Create new Objective-C project

Test sample build on simulator or device

Install CocoaPods for dependency management

Project.pbxproj in Xcode

Info.plist for app metadata

Header (.h) and implementation (.m) files

Bridging headers for Swift interoperability

Framework references and build settings

xcodebuild - build Xcode projects

clang file.m -framework Foundation - compile Objective-C

otool - inspect binary objects

nm - list symbols in binaries

instruments - profile performance and memory

NSLocalizedString for localized text

Unicode support via NSString

Right-to-left layout support

Regional formatting for dates, numbers, currencies

Resource bundles for multiple locales

Native support on macOS/iOS

VoiceOver and accessibility APIs

Interface Builder accessibility options

Dynamic Type and color contrast compliance

Testing accessibility in Xcode tools

Cocoa (macOS) and UIKit (iOS) for UI elements

Interface Builder for design

Auto Layout for responsive layouts

Themes and appearance customization

Event handling via target-action or delegates

Properties and instance variables

Global vs local variables

ARC-managed memory for objects

Singleton patterns for shared state

Runtime messaging for dynamic behavior

NSArray, NSDictionary, NSString

NSMutable variants for mutability

Core Data for persistence

NSUserDefaults for simple key-value storage

File I/O via Foundation framework