fcanas

Here's a lesson I learned testing UI components in Cocoa Touch on FCSettingsBooster.

Let's say you have some UISwitch element that you wire up programmatically:

[_theSwitch addTarget:self action:@selector(setDefaults) forControlEvents:UIControlEventValueChanged];

And you're going to try and make sure that some eventual effect is triggered by chaning the UISwitch. The fact that the setDefaults selector is called is irrelevant. In this case, we want to ensure that a completion block is called. You might think you can test it as follows:

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# Overview
Apple provides a good [introduction to view controllers](https://developer.apple.com/library/ios/featuredarticles/ViewControllerPGforiPhoneOS/Introduction/Introduction.html#//apple_ref/doc/uid/TP40007457) that starts off very general and proceeds to highly technical. The introduction is probably worth reading for anyone interacting with iOS developers (_e.g._ designers and product managers. Next, I would look at a [catalog](https://developer.apple.com/library/ios/documentation/WindowsViews/Conceptual/ViewControllerCatalog/Introduction.html#//apple_ref/doc/uid/TP40011313) of the "container" view controllers they encourage you to use. 

# Table Views
The [table view](https://developer.apple.com/library/ios/documentation/userexperience/conceptual/tableview_iphone/AboutTableViewsiPhone/AboutTableViewsiPhone.html) is one of the heaviest hitters in iOS. It's been around since the beginning, is dead-simple to use and is _highly_ customizable.

See also UITableViewCells

# Collection Views
Collection views

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Keybase proof

I hereby claim:

• I am fcanas on github.
• I am fcanas (https://keybase.io/fcanas) on keybase.
• I have a public key whose fingerprint is D5AC E5A4 D764 1040 F907 DB29 42DB B883 EBAC E404

To claim this, I am signing this object:

fcanas

# [Bret Victor](http://worrydream.com/)

* [Inventing on Principle](http://www.youtube.com/watch?v=PUv66718DII)
* [The Future of Programming](http://vimeo.com/71278954)
* [Stop Drawing Dead Fish](http://vimeo.com/64895205)

# Doug Engelbart

* [The Mother of All Demos](http://www.youtube.com/watch?v=yJDv-zdhzMY) - 1968 Ridiculousness

fcanas

import UIKit

var SpringKey :Int = 0

class ButtonSpringBehavior: NSObject {
    var scaleFactor :CGFloat = 1.3
    init(button: UIButton) {
        super.init()
        
        button.addTarget(self, action: #selector(springOut(sender:)), for: UIControlEvents.touchDown)

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func flipOn<T: RawOptionSetType>(value: T, change: T) -> T {
    return T(rawValue: value.rawValue | change.rawValue )
}

func flipOff<T: RawOptionSetType>(value: T, change: T) -> T {
    return T(rawValue: value.rawValue & ~change.rawValue )
}

func toggle<T: RawOptionSetType>(value: T, change: T) -> T {
    return T(rawValue: value.rawValue ^ change.rawValue )

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typealias ø = ((Int -> Int) -> Int -> Int)

func i<T>(v :T) -> T {
    return v
}

func c<T>(n: Int) -> (T -> T) -> T -> T {
    if n == 0 {
        return { x in i }
    }

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; To run:
;
; $ lein repl
; $ (load-file "shell_game_test.clj")

(ns the-shell-game-test
  (:require [clojure.test :refer :all]))

(defn move-the-ball [position, move]
  (nth (concat [position] (reverse move)) (+ 1 (.indexOf move position)))

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import UIKit

let white = UIColor.whiteColor().CGColor
let black = UIColor.blackColor().CGColor

let w :CGFloat = 105
let h :CGFloat = 60
let size = CGSizeMake(w, h)

UIGraphicsBeginImageContextWithOptions(size, true, 0.0)

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public struct Distance :NumericType {
    public var value :Double
    public init(_ value: Double) {
        self.value = value
    }
}

extension Distance :IntegerLiteralConvertible {
    public init(integerLiteral: IntegerLiteralType) {
        self.init(Double(integerLiteral))