chriseidhof

import Foundation

class Box<T> {
    let unbox: T
    init(_ value: T) { self.unbox = value }
}

struct Notification<A> {
    let name: String
}

jacks205

//How to URL Encode string
CFURLCreateStringByAddingPercentEscapes(nil, str, nil, "!*'();:@&=+$,/?%#[]\" ", kCFStringEncodingASCII)

ddunbar

New Build System Tricks

Command Line

alias xcbuild=$(xcode-select -p)/../SharedFrameworks/XCBuild.framework/Versions/A/Support/xcbuild
# THIS DOESNT WORK YET: xcbuild openIDEConsole  # … then switch to Xcode ➡️
xcbuild showSpecs
xcbuild build <foo.pif> [—target <target>]

nicklockwood

// Swift's untyped errors are a goddam PiTA. Here's the pattern I use to try to work around this.
// The goal is basically to try to guarantee that every throwing function in the app throws an
// ApplicationError instead of some unknown error type. We can't actually enforce this statically
// But by following this convention we can simplify error handling

enum ApplicationError: Error, CustomStringConvertible {
    
  // These are application-specific errors that may need special treatment
  case specificError1
  case specificError2(SomeType)

smileyborg

// UICollectionView Objective-C example

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
        
    NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] firstObject];
    if (selectedIndexPath != nil) {
        id<UIViewControllerTransitionCoordinator> coordinator = self.transitionCoordinator;
        if (coordinator != nil) {
            [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

cprovatas

import Foundation

extension Data {
    var prettyPrintedJSONString: NSString? { /// NSString gives us a nice sanitized debugDescription
        guard let object = try? JSONSerialization.jsonObject(with: self, options: []),
              let data = try? JSONSerialization.data(withJSONObject: object, options: [.prettyPrinted]),
              let prettyPrintedString = NSString(data: data, encoding: String.Encoding.utf8.rawValue) else { return nil }

        return prettyPrintedString
    }

kabouzeid

//
//  NSManagedObjectExtension.swift
//
//  Created by Karim Abou Zeid on 10.06.18.
//  Copyright © 2018 Karim Abou Zeid Software. All rights reserved.
//

import CoreData

extension NSManagedObject {

perlguy99

iOS Debugging Tips/Tricks/Hints

From SwiftTube Smart Debugging Talk 2018 and Advanced Debugging Techniques

brew install chisel

LLDB View Debugging

rileytestut

import Foundation

// Export running app as .ipa, then return path to exported file.
// Returns String because app crashes when returning URL from async function for some reason...
func exportIPA() async throws -> String
{
    // Path to app bundle
    let bundleURL = Bundle.main.bundleURL
    
    // Create Payload/ directory