timonus

- (UIImage *)dynamicImage
{
    UITraitCollection *const baseTraitCollection = /* an existing trait collection */;
    UITraitCollection *const lightTraitCollection = [UITraitCollection traitCollectionWithTraitsFromCollections:@[baseTraitCollection, [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleLight]]];
    UITraitCollection *const purelyDarkTraitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:UIUserInterfaceStyleDark];
    UITraitCollection *const darkTraitCollection = [UITraitCollection traitCollectionWithTraitsFromCollections:@[baseTraitCollection, purelyDarkTraitCollection]];
    
    __block UIImage *lightImage;
    [lightTraitCollection performAsCurrentTraitCollection:^{
        lightImage = /* draw image */;

timonus

// Workaround for SFSafariViewController preview + iOS 13 context menu negative interaction bug (FB7564018)
// Examples: https://db.tt/hvBJOBdZwL, https://db.tt/egp20bSfS0
// With fix: https://db.tt/r5nCLNYbfs

@interface SFSafariViewController (ContextMenuBugWorkaround)

/// If this returns @c YES it's safe to present this view controller when "committing" from an iOS 13 context menu. If not, you should create a fresh @c SFSafariViewController and present that instead.
- (BOOL)canBePresentedOnContextMenuCompletion;

@end

timonus

#import <objc/runtime.h>

void tj_swizzle(Class class, SEL originalSelector, SEL swizzledSelector)
{
    Method originalMethod = class_getInstanceMethod(class, originalSelector);
    Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
    
    BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
    
    if (didAddMethod) {

timonus

//
//  ViewController.swift
//  Playground
//
//  Created by Tim Johnsen on 3/24/23.
//

import UIKit

class MyObject {