Skip to content

Instantly share code, notes, and snippets.

Douglas Hill douglashill

Block or report user

Report or block douglashill

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
@douglashill
douglashill / main.m
Last active Jun 20, 2019
A minimal iOS 13 app that is set up in Objective-C rather than using a storyboard and UIApplicationSceneManifest
View main.m
@import UIKit;
@interface SceneDelegate : UIResponder <UIWindowSceneDelegate>
@end
@implementation SceneDelegate
@synthesize window = _window;
- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions {
@douglashill
douglashill / AdaptiveTraitsContainer.swift
Created Apr 13, 2019
Experimenting altering an iOS app size class to be responsive to the Dynamic Text size.
View AdaptiveTraitsContainer.swift
import UIKit
/// A wrapper view controller that makes the horizontal size class
/// be based on both the Dynamic Text size and the width available.
class AdaptiveTraitsContainer: UIViewController {
let wrappedViewController: UIViewController
init(wrappedViewController: UIViewController) {
self.wrappedViewController = wrappedViewController
super.init(nibName: nil, bundle: nil)
@douglashill
douglashill / KeyboardTableView.swift
Last active Jun 24, 2019
A UITableView that allows navigation and selection using a hardware keyboard.
View KeyboardTableView.swift
// Douglas Hill, December 2018
// Made for https://douglashill.co/reading-app/
import UIKit
/// A table view that allows navigation and selection using a hardware keyboard.
/// Only supports a single section.
class KeyboardTableView: UITableView {
// These properties may be set or overridden to provide discoverability titles for key commands.
var selectAboveDiscoverabilityTitle: String?
@douglashill
douglashill / PSPDFTableViewCell+LayoutMarginsGuide.m
Created Nov 16, 2018
Alternative for a table view cell’s content view’s layoutMarginsGuide that works on iOS 10.
View PSPDFTableViewCell+LayoutMarginsGuide.m
@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
douglashill / ReduceMotionScrollView.swift
Created Oct 21, 2018
A UIScrollView subclass that honours the reduce motion accessibility setting
View ReduceMotionScrollView.swift
// 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
douglashill / UIContentSizeCategory+ShortDescription.swift
Created Aug 22, 2018
Compact description of an iOS content size category. Useful for analytics.
View UIContentSizeCategory+ShortDescription.swift
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
douglashill / LocalisedStrings.swift
Last active Sep 17, 2018
Generating an enum to ensure only defined localised string keys are used. For development on Apple platforms.
View LocalisedStrings.swift
// 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
douglashill / LiveSquishButton.swift
Created Apr 27, 2017
(Not working well yet) What if a button had a variable touch down state without using a canned animation?
View LiveSquishButton.swift
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
douglashill / K-means colour matching.m
Created Sep 9, 2016
K-means colour matching — putting this old file somewhere
View K-means colour matching.m
@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
douglashill / LazyMapCollection-1.swift
Last active Aug 14, 2016
Can’t pass LazyMapCollection to Objective-C API
View LazyMapCollection-1.swift
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'
You can’t perform that action at this time.