douglashill

@implementation PSPDFTableViewCell // UITableViewCell subclass

/**
 On iOS 10, constraints involving a UITableViewCell’s contentView’s layoutMarginsGuide are removed for some
 reason before the cell appears, which breaks the layout. This layout guide is a working alternative.
 */
- (UILayoutGuide *)pspdf_layoutMarginsGuide {
    if (@available(iOS 11.0, *)) {
        return self.contentView.layoutMarginsGuide;
    }

douglashill

// Douglas Hill, October 2018

import UIKit

/**
 A scroll view that honours the reduce motion accessibility setting.

 If reduce motion is enabled, animated adjustments to contentOffset
 will use a cross dissolve instead of translation.

douglashill

private extension UIContentSizeCategory {
     var shortDescription: String {
         switch self {
         case .unspecified: return "unspecified"

         case .extraSmall: return "XS"
         case .small: return "S"
         case .medium: return "M"
         case .large: return "L"
         case .extraLarge: return "XL"

douglashill

// Douglas Hill, February 2018

import Foundation

/// Returns a localised string with the key as an enum case so the compiler checks it exists.
/// The enum should be automatically generated using UpdateLocalisedStringKeys.swift.
public func localisedString(_ key: LocalisedStringKey) -> String {
    return Bundle.main.localizedString(forKey: key.rawValue, value: nil, table: nil)
}

douglashill

import UIKit

class LiveSquishButton: UIView {
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        updateSquish(with: 0.05)
    }

    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesMoved(touches, with: event)

douglashill

@import Foundation;
@import CoreGraphics;
@import ImageIO;

static NSUInteger maxThumbnailSize = 20;

extern uint64_t dispatch_benchmark(size_t count, void (^block)(void));

/// Returns a CGImage with a +1 retain count.
static CGImageRef createThumbnailFromURL(NSURL *imageURL, NSUInteger maxPixelSize)

douglashill

import Foundation

let dictionary = ["one": 1, "two": 2]
let lazyValues = dictionary.values
let jsonData = try JSONSerialization.data(withJSONObject: lazyValues, options: [])
// ❗️ Argument type 'LazyMapCollection<Dictionary<String, Int>, Int>' does not conform to expected type 'AnyObject'

douglashill

@implementation NSArray (DHRandom)

- (nullable id)dh_random {
    if (self.count == 0) {
        return nil;
    }
    return self[arc4random_uniform((u_int32_t)self.count)];
}

@end

douglashill

@import Foundation;

NS_ASSUME_NONNULL_BEGIN

@interface DHLazyLinkedList<ObjectType> : NSArray<ObjectType>

- (instancetype)initWithRootObject:(ObjectType)rootObject nextObjectBlock:(ObjectType _Nullable (^)(ObjectType))next NS_DESIGNATED_INITIALIZER;

- (nullable ObjectType)objectAfterObject:(ObjectType)object;

douglashill

#include <CoreGraphics/CoreGraphics.h>

static inline CGFloat gammaCorrect(CGFloat component) {
	if (component > 0.04045f) {
		return pow((component + 0.055f) / 1.055f, 2.4f);
	}

	return component / 12.92f;
}