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jbrennan / Emojis.m
Created Jun 19, 2014
Finding emojis in NSStrings
View Emojis.m
// This is bad and I feel bad. Suggestions for improvements on finding Emoji?
// This current solution is acceptable for us right now, but obviously the less I have to exclude the better.
@interface NSString (Emoji)
Returns if the receiver may contain Emoji characters.
@note This method may have false-positives since it sees if the string has non-ASCII characters. If the receiver has a non-Emoji, non-ASCII character (like é) then it will still return YES.
View UIGestureRecognizer+ForDummies.m
@implementation UIGestureRecognizer (ForDummies)
+ (instancetype)newWithView:(UIView *)view target:(id)target action:(SEL)action delegate:(id<UIGestureRecognizerDelegate>)delegate
UIGestureRecognizer *gesture = [[[self class] alloc] initWithTarget:target action:action];
gesture.delegate = delegate;
[view addGestureRecognizer:gesture];
view.userInteractionEnabled = YES;
return gesture;
jbrennan / boool.swift
Created Sep 2, 2014
Boooleans in Swift
View boool.swift
typealias Boool = Bool? // Can be true, false, or nil
jbrennan / Elsewhere.swift
Created Oct 28, 2014
Generic UIViewController subclass
View Elsewhere.swift
// usage
let pop = PopoverViewController<SomeViewController>()
self.showViewController(pop) // adds pop.view as a subview (stepping over this line reveals that pop.view becomes non-nil)
// -viewDidLoad is not called...
jbrennan / Bug.swift
Created Jul 16, 2015
Bug related to having an optional enum in a struct in Swift
View Bug.swift
import Foundation
public struct FeaturedItem {
public enum ImageSource {
case Bundled(name: String) // simplified enum with one case to illustrate the bug.
public let localizedTitleImageSource: ImageSource? // This optional causes Swift to barf. If it's non-optional, it compiles fine
// Workaround in this case is to just use an optional String instead of the enum.
jbrennan / gist:1047140
Created Jun 26, 2011
Yo dawg, I heard you like Blocks
View gist:1047140
// Loads the full-sized image ... might be big.
- (void)originalImageWithCompletionHandler:(DownloadedImageCompletionHandler)completionHandler {
// First check to see if this image is cached in memory, if execute the handler passing in the image.
if (nil != _originalImage) {
if (completionHandler) {
completionHandler(self, _photo, _photo.urlOriginal, _originalImage);
jbrennan /
Created Nov 16, 2015
Some notes on getting help with Reactive Cocoa Signals with help from a coworker

Notes about Signals

Nacho offered me a little bit of help today with a relatively simple problem. Here are some notes on it for future reference.

The problem

I have a container view which has in it a TabBarView and a ScrollView. When one of the tabs in the tab bar view is tapped, I want it to update its internal state (which button is selected) and then I need the container view to be able to respond as well (to scroll its scrollview).

View feed-subscribers.php
<?php /* With apologies to Dr. Drang and John Siracusa.
By Marco Arment.
Released into the public domain with no warranties and no restrictions.
Usage: Pipe an Apache access log into stdin, e.g.:
php -f feed-subscribers.php < /var/log/httpd/access_log
jbrennan / ImmediatePanGestureRecognizer.m
Created Dec 29, 2015
A UIPanGestureRecognizer subclass to recognize immediately. Is this a good idea?
View ImmediatePanGestureRecognizer.m
@implementation ImmediatePanGestureRecognizer
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[super touchesBegan:touches withEvent:event];
if (self.numberOfTouches >= self.minimumNumberOfTouches) {
self.state = UIGestureRecognizerStateBegan;
jbrennan / PrototopeViewController.swift
Created Mar 15, 2016
Example of using setting up Prototope in a UIViewController
View PrototopeViewController.swift
// ViewController.swift
// DrawingProto
// Created by Jason Brennan on 2015-12-19.
// Copyright © 2015 Jason Brennan. All rights reserved.
import UIKit
import Prototope
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