wh1pch81n’s gists

wh1pch81n / almostProtected.swift

Created November 5, 2016 01:43

Swift has no access modifier "Protected". Below is the closest thing to protected. You can call this semi-protected.

	import UIKit

	// discourage directly setting property m by using private(set). Anyone can still set the value of the property via setValue(_ :forKey:)

	public class Abe: NSObject {
	public private(set) var m: [String] = ["abc"]
	}

	public class Billy: Abe {
	override init() {

wh1pch81n / simplified_NS_STRING_ENUM.h

Created November 5, 2016 03:12

Using NS_STRING_ENUM can be verbose when used in objective c. Below is an example of how macros can be used to shorten it. These macros can be used and reused by cleverly defining and underlining macros.

	//global macro helpers
	#define DH_Str(I) #I
	#define __DH_STRING_ENUM(PREFIX, SUFFIX, PREFIX2, SUFFIX2) \
	static PREFIX PREFIX##_##SUFFIX = @DH_Str(PREFIX2##SUFFIX2);
	#define _DH_STRING_ENUM2(PREFIX, SUFFIX, VAL) \
	static PREFIX PREFIX##_##SUFFIX = VAL;
	#define _DH_STRING_ENUM(T,I) \
	__DH_STRING_ENUM(T, I, T, I)
	//------ file dependent
	// the enum type shall be DHBlahKey

wh1pch81n / enum_count.swift

Last active November 5, 2016 06:12

A method to help count enums. The switch statement will enforce you cover a state where you count. This is in response to this: https://github.com/jtbandes/swift-evolution/blob/case-enumerable/proposals/0000-derived-collection-of-enum-cases.md

	enum Planets {
	case Mercury
	case Venus
	case Earth
	case Mars
	case Jupiter

	static let count: Int = _count()
	private static func _count(_ first: Planets = .Mercury) -> Int {
	print("blahp")

wh1pch81n / UIViewAnimation_as_block

Created December 7, 2016 19:02

using Currying on UIView Animation

	public class func animation(withDuration duration: TimeInterval) -> (@escaping () -> ()) -> (@escaping (Bool) -> ()) -> Void {
	return { (animations: @escaping () -> ()) in
	return { (completion: @escaping (Bool) -> ()) in
	UIView.animate(withDuration: duration, animations: animations, completion: completion)
	}
	}
	}

wh1pch81n / UIKit_Animator_API.swift

Created December 10, 2016 22:18

A wrapper that allows you to set animation and completion handler in a more consistent way

	extension UIKit.UIView {

	public class Animator {
	fileprivate var animatorBlock: ((@escaping () -> (), @escaping (Bool) -> ()) -> ())
	fileprivate var animations: () -> () = { _ in }

	public init(animatorBlock: @escaping ((@escaping () -> (), @escaping (Bool) -> ()) -> ())) {
	self.animatorBlock = animatorBlock
	}

wh1pch81n / WhyAutoLayout_viewGapView.swift

Last active December 28, 2016 20:34

	// Adding a vertical constraint between view1 and view2 using default padding

	// DHConstraintBuilder
	parentView.addConstraints(view1 ^-^ view2).V

	// NSLayoutConstraints
	parentView.translatesAutoresizingMaskIntoConstraints = false
	parentView.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:[view1]-[view2]"
	, options: NSLayoutFormatOptions(rawValue: 0)
	, metrics: nil, views: ["view1": view1, "view2": view2]))

wh1pch81n / WhyAutoLayout_rgbview_visualformat.swift

Last active December 28, 2016 21:29

	// NSLayoutConstraint

	// Given an array of 3 views
	let viewArray = [
	greenView_vf,
	redView_vf,
	blueView_vf
	]
	// set this value to false to make auto layout work
	viewArray.forEach({ $0.translatesAutoresizingMaskIntoConstraints = false })

wh1pch81n / WhyAutoLayout_rgbviews_dhconstraintbuilder.swift

Created December 28, 2016 21:23

	// DHConstraintBuilder

	//1
	view_cb.addConstraints(() \|-^ greenView_cb ^-^ 15.5 ^-^ redView_cb ^-\| ()).H

	//2
	view_cb.addConstraints(() \|-^ blueView_cb ^-\| ()).H

	//3
	view_cb.addConstraints(() \|-^ greenView_cb ^-^ blueView_cb ^-\| ()).V

wh1pch81n / SwiftyNotification_InAction.swift

Created December 31, 2016 03:27

	// 1
	var buttonNotification = SwiftyNotification<String, String, Int>()

	// 2
	buttonNotification.add(subscriber: self) { (info, n) in
	// 3
	print(info)
	// 4
	n = 8
	}

wh1pch81n / SwiftyNotification_CenterImplementation_Extension.swift

Last active December 31, 2016 03:55

	// 1
	public struct SwiftyNotificationCenter {}

	// ...

	// extended somewhere else in your code base
	// 2
	extension SwiftyNotificationCenter {
	static var buttonNotification = SwiftyNotification<String, String, Int>()
	static var anotherNotification = SwiftyNotification<String, UIColor, Bool>()