DuncanMC

import UIKit

struct AStruct {
  let anInt: Int
  let aString: String
}

var array: [AStruct]

DuncanMC

import UIKit
import AVFoundation


class ImageViewWithGradient: UIImageView
{
  let myGradientLayer: CAGradientLayer
  
  override init(frame: CGRect)
  {

DuncanMC

import UIKit
import AVFoundation

let dictionary = ["aKey": "aValue", "anotherKey": "anotherValue"]
let theJSONData = NSJSONSerialization.dataWithJSONObject(
  dictionary ,
  options: NSJSONWritingOptions.PrettyPrinted,
  error: nil)
let theJSONText = NSString(data: theJSONData!,
  encoding: NSASCIIStringEncoding)

DuncanMC

Using Core Foundation (CF) objects in ARC


ARC makes most aspects of memory management easier, but managing CF objects is still up to you, and converting 
between NSObjects and CFObjects is actually more complicated.

If you create a CF object that follows the "Create Rule" (you own an object that is created with a method with 
"create" or "copy" its name) you have to release it.

In ARC, that's still true.

DuncanMC

UIBezierPath *aPath = [UIBezierPath UIBezierPath];
[aPath moveToPoint: CGPointMake(0, 0);
[aPath addLineToPoint: CGPointMake(0, 200)];
[aPath addLineToPoint: CGPointMake(200, 200)];
[aPath addLineToPoint: CGPointMake(200, 0)];
[[aPath closePath];