macbaszii

Assignment

let constant = "Constant cannot be changed"
var variable = "Variable can be changed later"

var x,y: Int
let x = 0, y = 0

Types

macbaszii

NSInteger x = 30;
CGFloat y = (CGFloat)x;

macbaszii

let pi: Double = 3.14159
let fpi: Float = 3.14159
let x = Int(pi) // 3
let dpi = Double(pi)
let dgf = CGFloat(pi)

let array = Array("abc") // array = ["a", "b", "c"]
let string = String(["a", "b", "c", "d"]) // string = "abcd"

let intConvert = String(44) // let's try String(37.5)

macbaszii

// AnyObject might be used in this way

// Properties
var destinationViewController: AnyObject
var toolbarItems: [AnyObject]

// Function or Method Arguments
func prepareForSegue(segue: UIStoryboardSegue, sender AnyObject)
func addConstraints(constraints: [AnyObject])
func appendDigit(sender: AnyObject)

macbaszii

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
  if segue.identifier == "ViewImage" {
    let imageViewController = segue.destinationViewController as ImgurImageViewController
    let cell = sender as ImageCollectionViewCell
    if let indexPath = imagesCollectionView.indexPathForCell(cell) {
      imageViewController.imgurImage = images[indexPath.row]
    }
  }
}

macbaszii

@IBAction func touched(sender: AnyObject) {
  if let button = sender as? Button {
    button.setTitle("Touched", forState: .Normal)
  }
}

@IBAction func touched(sender: AnyObject) {
  if sender is UISegmentedControl {
    let segmentedControl = sender as UISegmentedControl
    let selectedIndex = segmentedControl.selectedSegmentIndex

macbaszii

@IBAction func touched(sender: AnyObject) {
  if sender is UIButton {
    let buttonTitle = (sender as UIButton).currentTitle
  }
}

macbaszii

for item in toolbarItems! {
  if let barButtonItem = item as? UIBarButtonItem {
    // Do something with UIBarButtonItem
  }
  
  if let segmentedControl = item as? UISegmentedControl {
    // Do something with UISegmentedControl
  }
}

macbaszii

//
//  PlacePickerViewController.swift
//  TaxiReporter
//
//  Created by Kiattisak Anoochitarom on 2/27/2558 BE.
//  Copyright (c) 2558 Kiattisak Anoochitarom. All rights reserved.
//

import UIKit
import FacebookSDK

macbaszii

package main

import "fmt" // another package contains function

func main() {
	var hello = "hello gopher!!" // type inference
	// can be shorten in -> hello := "hello gopher!!"
	fmt.Println(hello)
	
	arr := [6]int{1, 2, 3, 4, 5}