iOS - เริ่มต้นเขียนภาษา Swift บนแอพ iPhone รองรับ iOS 8

let LoginCountNumberLimit = 5
var LoginCountNumber = 1

var a=1.0, b=2.0, c=3.0

var Message: string

Message = “Hello World!”

let π = 3.14159

println(Message)

println(“This is a Table”)

println(“”Message is: \(Message)”)

var colors = ["red", "blue"]
var moreColors: String[] = ["orange", "purple"] // explicit type
colors.append("green") // [red, blue, green]
colors += "yellow" // [red, blue, green, yellow]
colors += moreColors // [red, blue, green, yellow, orange, purple]
 
var days = ["mon", "thu"]
var firstDay = days[0] // mon
days.insert("tue", atIndex: 1) // [mon, tue, thu]
days[2] = "wed" // [mon, tue, wed]
days.removeAtIndex(0) // [tue, wed]

class Counter {
  var count: Int = 0 
  func inc() { 
    count++
  }
  func add(n: Int) {
    count += n
  }
  func printCount() {
    println("Count: \(count)")
  }
}
 
var myCount = Counter()
myCount.inc()
myCount.add(2)
myCount.printCount() // Count: 3

let happy = true
if happy {
    println("We're Happy!")
} else {
    println("We're Sad :('")
}
// We're Happy!

let speed = 28
if speed <= 0 {
    println("Stationary")
} else if speed <= 30 {
    println("Safe speed")
} else {
    println("Too fast!")
}
// Safe speed

let n = 2
switch n {
    case 1:
        println("It's 1!")
    case 2...4:
            println("It's between 2 and 4!")
    case 5, 6:
        println("It's 5 or 6")
    default:
        println("Its another number!")
}
// It's between 2 and 4!

var days = ["mon": "monday", "tue": "tuseday"] 
days["tue"] = "tuesday" // change the value for key "tue"
days["wed"] = "wednesday" // add a new key/value pair
 
var moreDays: Dictionary = ["thu": "thursday", "fri": "friday"]
moreDays["thu"] = nil // remove thu from the dictionary
moreDays.removeValueForKey("fri") // remove fri from the dictionary

enum CollisionType: Int { 
 case Player = 1 
 case Enemy = 2 
} 
var type = CollisionType.Player

for var index = 1; index < 3; ++index {
    // loops with index taking values 1,2 
}
for index in 1..3 {
    // loops with index taking values 1,2
}
for index in 1...3 { 
    // loops with index taking values 1,2,3
}
 
let colors = ["red", "blue", "yellow"]
for color in colors {
    println("Color: \(color)")
}
// Color: red
// Color: blue
// Color: yellow 
 
let days = ["mon": "monday", "tue": "tuesday"]
for (shortDay, longDay) in days {
    println("\(shortDay) is short for \(longDay)")
}
// mon is short for monday
// tue is short for tuesday

func iAdd(a: Int, b: Int) -> Int {
  return a + b
}
iAdd(2, 3) // returns 5
 
func eitherSide(n: Int) -> (nMinusOne: Int, nPlusOne: Int) {
  return (n-1, n+1)
}
eitherSide(5) // returns the tuple (4,6)

import UIKit
 
class ViewController: UIViewController {
                            
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        println("Hello World")
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
 
 
}