Quick cheat sheet of common Swift vars, arrays, funcs, classes

cheatSheet.swift

// Kurt's Swift guide.
 
import UIKit
 
// Variables
// 'var' will pick a type ie string or int or whatever
var make = "Ferrari"
var model = "488 GTB"
 
// Old concatenation
var returnValue = make + " " + model
// New concatenation
var retunVal = "You have a  \(make) \(model)"
 
// Force a var type
var type:String = "Coupe"
var cylinders:Int = 8
 
// concatenation in new type with multiplier
var score = 125
var multi = 4
var output = "Your score is \(score * multi)"
 
//let is a fixed variable that cannot change
let player = "Kurt"
let MY_SITE = "http://www.this.com"
 
 
//Arrays
var cars = ["Ford", "Ferrari", "Fiat", "BMW", "Audi"]
var car0 = cars[0]
 
// Each for loop
for car in cars{
    //println(car)
}
 
//Traditional for loop
for (var i = 0; i < 3; ++i){
    println(cars[i])
}
 
 
//conditionals
var fruit = "apple"
var myFruit = "mango"
 
 
// If/Else
if(fruit == myFruit){
    println("This is true")
}else if(fruit == "apple"){
    println("")
    println("true")
}else{
    println("this is false")
    
}
 
// Switch
switch fruit{
    case "apple":
    println("the fruit was an \(fruit)")
    
    case "bannana":
    println("the fruit is a \(fruit)")
    
    default:
    println("nothing")
}
 
// Functions
func add(num1:Int, num2:Int) -> Int{
    return num1 + num2
}
 
add(50, 4)
 
 
func getCars() -> (String, String){
    return ("488 GTB", "458 Speciale")
}
 
getCars();
 
 
 
 
 
//Classes
 
class Cars{
    
    var doors = 0
    var cylinders = 0
    
    func getDetails() -> String {
        return "This car has \(doors) doors and \(cylinders) cylinders"
    }
    
}
 
var myCar = Cars()
 
myCar.doors = 2
myCar.cylinders = 8
 
myCar.getDetails()
 
 
 
class Animal{
    
    var name = "default"
    var age = 0
    
    func getDetails() -> String {
        return "this animals name is \(name) it is \(age) years old."
    }
    
}
 
var myAnimal = Animal()
 
myAnimal.name = "Ralphy"
myAnimal.age = 10
 
myAnimal.getDetails()
 
 
 
class Dog : Animal{
    func woof() -> String {
        return "Woof Woof Woof."
    }
}
 
class Cat : Animal {
    func meow() -> String {
        return "Cats make me sneeze!"
    }
}
 
 
var kurtsDog = Dog()
 
kurtsDog.name = "Ralphy"
kurtsDog.age = 10
kurtsDog.woof()
kurtsDog.getDetails()
 
var kurtsCat = Cat()
 
kurtsCat.name = "Frank"
kurtsCat.age = 1
kurtsCat.meow()
kurtsCat.getDetails()