Swift Introduction

Key	Value
Current Swift Version	4.2
Current XCode Version	9.4 / 10 Beta

Reading Resources:

• https://swift.org/

• https://github.com/iwasrobbed/Swift-CheatSheet

• https://github.com/vsouza/awesome-ios
• https://github.com/matteocrippa/awesome-swift
• https://www.raywenderlich.com/151741/macos-development-beginners-part-1

Development Setup

• Mac Devices [Mac, iOS]
• XCode => https://developer.apple.com/download/more/
• CocoaPods => https://cocoapods.org/

# CocoaPods setup:
brew install cocoapods
brew cask install cocoapods-app
pod setup # this might take a while..

# Create a XCode Project and
# define your project directory:
export PROJECT_DIR=~/Repositories/xcode/Demo
mkdir -p $PROJECT_DIR && cd $PROJECT_DIR

# init CocoaPods for your project by creating an empty file
touch Podfile

cat > Podfile << EOF
# specify the platform + version 
# you want to support
platform :osx, '10.10'

# When using Swift, we can do dynamic frameworks:
use_frameworks!

# specify a target:
target 'Demo' do
  # Include SwiftyJSON, a nice JSON Library
  pod 'SwiftyJSON', '~> 4.1'
end
EOF

# Install Dependencies:
pod install

# Open newly created workspace:
open Demo.xcworkspace

Java → Swift

• Class Definitions

Java	Swift
public MyClass { ... }	class MyClass { ... }
public Interface MyInterface	protocol MyProtocol { ... }
public SubClass extends MyClass { ... }	class SubClass : MyClass { ... }

• Access Modifier

Java 8	Swift 4	Visibility
	open	Classes declared as open can be subclassed outside a module
public	public	Within the same Project
protected	internal (=default)	Within the same Package/Module
no modifier (=default)	no modifier (=internal)	Within the same Package/Folder
	fileprivate	Within the source file
private	private	Within the enclosing declaration

• Swift: Access Control

Modifier	Class	Subclass	File	Module	World	World++
open	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:
public	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:
internal	:white_check_mark:	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:	:x:
fileprivate	:white_check_mark:	:white_check_mark:	:white_check_mark:	:x:	:x:	:x:
private	:white_check_mark:	:white_check_mark:	:x:	:x:	:x:	:x:

Note: World++ means that our Classes/Methods can be overridden/extended from outsid our module.