Skip to content

Instantly share code, notes, and snippets.

extension UIHostingController {
convenience public init(rootView: Content, ignoreSafeArea: Bool) {
self.init(rootView: rootView)
if ignoreSafeArea {
disableSafeArea()
}
}
func disableSafeArea() {
@zarghol
zarghol / combine+delegate.swift
Created November 25, 2019 12:30
Combine+Pattern Delegate
import Foundation
import Combine
import CoreLocation
extension Subscriber {
func eraseToAnySubscriber() -> AnySubscriber<Self.Input, Self.Failure> {
return AnySubscriber<Input, Failure>.init(receiveSubscription: { sub in
self.receive(subscription: sub)
}, receiveValue: { value in
self.receive(value)
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active April 10, 2025 19:06
Making efficient use of the libdispatch (GCD)

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

  • You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

  • Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

@zacwest
zacwest / ios-font-sizes.swift
Last active April 13, 2025 15:39
iOS default font sizes - also available on https://www.iosfontsizes.com
let styles: [UIFont.TextStyle] = [
// iOS 17
.extraLargeTitle, .extraLargeTitle2,
// iOS 11
.largeTitle,
// iOS 9
.title1, .title2, .title3, .callout,
// iOS 7
.headline, .subheadline, .body, .footnote, .caption1, .caption2,
]
//
// ProgrammerAssertions.swift
// Assertions
//
// Created by Mohamed Afifi on 12/20/15.
// Copyright © 2015 mohamede1945. All rights reserved.
//
import Foundation
@madhikarma
madhikarma / build_framework.sh
Created October 13, 2015 12:26
Script to build a framework for multiple architectures
# Merge Script
# http://code.hootsuite.com/an-introduction-to-creating-and-distributing-embedded-frameworks-in-ios/
# 1
# Set bash script to exit immediately if any commands fail.
set -e
# 2
# Setup some constants for use later on.
@JaviLorbada
JaviLorbada / FRP iOS Learning resources.md
Last active March 19, 2025 07:02
The best FRP iOS resources.

Videos

@staltz
staltz / introrx.md
Last active April 17, 2025 06:34
The introduction to Reactive Programming you've been missing
@rsaunders100
rsaunders100 / gist:8972207
Created February 13, 2014 09:24
NSDateFormatter reuse
// For NSString to NSDate to parse server dates in the full ISO 8601 format
// E.g. 2014-02-11T10:22:46+00:00
+ (NSDateFormatter *) iso8601FullDateFromatter
{
static NSDateFormatter * dateFormatter;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
dateFormatter = [[NSDateFormatter alloc] init];
@jazzychad
jazzychad / SPVMainViewController.m
Created December 8, 2013 22:04
example of transferring velocity of UIPanGestureRecoginizer to a UIView spring animation.
#import "SPVMainViewController.h"
@implementation SPVMainViewController
{
UIView *_weightView;
UIPanGestureRecognizer *_recog;
}
- (void)viewDidLoad
{