Skip to content

Instantly share code, notes, and snippets.

@pk
pk / ExampleTest.m
Created June 21, 2011 15:00
Using method swizzling and blocks to test Class methods in Objective-C.
#import "SenTestCase+MethodSwizzling.m"
@interface ExampleTest : SenTestCase {}
+ (BOOL)trueMethod;
+ (BOOL)falseMethod;
@end
@implementation ExampleTest
+ (BOOL)trueMethod { return YES; }
@brendanjerwin
brendanjerwin / gist:5677203
Last active February 11, 2016 23:41
A pattern for increasing the testability of `prepareForSegue:sender:`
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
DDLogVerbose(@"prepareForSegue: %@", segue.identifier);
SEL selector = NSSelectorFromString([NSString stringWithFormat:@"%@ToController:WithSegue:", segue.identifier]);
if ([self respondsToSelector:selector]) {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[self performSelector:selector withObject:segue.destinationViewController withObject:segue];
#pragma clang diagnostic pop
} else {
@eternalstorms
eternalstorms / Apple Evangelists.txt
Created June 12, 2013 09:07
Apple Evangelists (WWDC 2013)
UI- and App Frameworks Evangelist - Jake Behrens, behrens@apple.com, twitter: @Behrens
- What's new in Cocoa
- Accessibility in iOS
- Building User Interfaces for iOS 7
- Getting Started with UIKit Dynamics
- What's new in Cocoa Touch
- What's New With Multitasking
- Best Practices for Cocoa Animation
- Improving Power Efficiency with App Nap
- Introducing Text Kit
@bastibense
bastibense / README.md
Last active September 28, 2020 03:53
Fix blurry fonts on some external monitors when using MacBook Pro Retina

How to fix blurry fonts on some external monitors when using MacBook Pro Retina

It seems that graphcis and fonts look rather blurry on some monitors when hooked up to a MacBook Pro (Retina). This might fix the issue for you:

  1. Download patch-edid.rb from http://embdev.net/attachment/168316/patch-edid.rb

  2. Execute in Terminal (without the $):

    $ ruby patch-edid.rb

  3. Copy produced folder (example: DisplayVendorID-22f0) to /System/Library/Displays/Overrides (authorize if needed, if the folder exists, backup it before)

@nicklockwood
nicklockwood / gist:7447381
Last active February 14, 2017 09:31
Why I still prefer nibs to storyboards.

Storyboard Segues initially seem like a pretty cool way to construct interfaces using minimal glue code. But actually, ordinary nibs already support this, and in a much more flexible way.

Certainly, a Storyboard lets you bind a button action up to display a view controller with no code, but in practice you will usually want to pass some data to the new controller, depending on which button you used to get there, and this means implementing the -prepareForSegue:sender: method, which rapidly becomes a giant if/elseif statement of doom, negating most of the benefit of the codeless segue:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"modalSegue"])
    {
        ModalViewController *controller = (ModalViewController *)segue.destination;

controller.someProperty = someValue;

@steipete
steipete / UITableViewMore.m
Last active January 29, 2018 14:19
Using the "More" button. Of course the simple way that Apple uses in Mail/iOS is not public. rdar://16600859
- (NSString *)tableView:(UITableView *)tableView titleForSwipeAccessoryButtonForRowAtIndexPath:(NSIndexPath *)indexPath {
return @"More";
}
- (void)tableView:(UITableView *)tableView swipeAccessoryButtonPushedForRowAtIndexPath:(NSIndexPath *)indexPath {
NSLog(@"I wanted to be a pretty public API, but then time ran out and they forgot me...");
// Hide the More/Delete menu.
[self setEditing:NO animated:YES];
}

Validação para cartão de crédito.

Bin e padrões para validação de cartão de crédito.

Bandeira Comeca com Máximo de número Máximo de número cvc
Visa 4 13,16 3
Mastercard 5 16 3
Diners 301,305,36,38 14,16 3
@nicklockwood
nicklockwood / Hacking UIView Animation Blocks.md
Last active June 18, 2024 15:35
This article was originally written for objc.io issue 12, but didn't make the cut. It was intended to be read in the context of the other articles, so if you aren't familiar with concepts such as CALayer property animations and the role of actionForKey:, read the articles in that issue first.

Hacking UIView animation blocks for fun and profit

In this article, I'm going to explore a way that we can create views that implement custom Core Animation property animations in a natural way.

As we know, layers in iOS come in two flavours: Backing layers and hosted layers. The only difference between them is that the view acts as the layer delegate for its backing layer, but not for any hosted sublayers.

In order to implement the UIView transactional animation blocks, UIView disables all animations by default and then re-enables them individually as required. It does this using the actionForLayer:forKey: method.

Somewhat strangely, UIView doesn't enable animations for every property that CALayer does by default. A notable example is the layer.contents property, which is animatable by default for a hosted layer, but cannot be animated using a UIView animation block.

@chriseidhof
chriseidhof / AppDelegate.swift
Created December 13, 2015 15:05
Functional Swift Talk
import UIKit
struct Screen<A> {
let run: (A -> ()) -> UIViewController
}
struct Step<A> {
let build: (navigationController: UINavigationController, callback: A -> ()) -> UIViewController
}
@miguelbassila
miguelbassila / Builder.swift
Created April 19, 2016 01:19
Design Pattern: Builder
class PersonBuilder {
private final var name: String
private final var age: String?
private final var gender: String?
init(name: String) {
self.name = name
}