steventroughtonsmith

typedef enum _UIBackgroundStyle {
	UIBackgroundStyleDefault,
	UIBackgroundStyleTransparent,
	UIBackgroundStyleLightBlur,
	UIBackgroundStyleDarkBlur,
	UIBackgroundStyleDarkTranslucent
} UIBackgroundStyle;

@interface UIApplication (UIBackgroundStyle)
-(void)_setBackgroundStyle:(UIBackgroundStyle)style;

breeno

	CFNotificationCenterAddObserver(CFNotificationCenterGetLocalCenter(),
									NULL,
									notificationCenterHookProc,
									NULL,
									NULL,
									CFNotificationSuspensionBehaviorDeliverImmediately);
  

void notificationCenterHookProc (CFNotificationCenterRef center,
				 void *observer,

mattt

Greetings, NSHipsters!

As we prepare to increment our NSDateComponents -year by 1, it's time once again for NSHipster end-of-the-year Reader Submissions! Last year, we got some mind-blowing tips and tricks. With the release of iOS 7 & Mavericks, and a year's worth of new developments in the Objective-C ecosystem, there should be a ton of new stuff to write up for this year.

Submit your favorite piece of Objective-C trivia, framework arcana, hidden Xcode feature, or anything else you think is cool, and you could have it featured in the year-end blowout article. Just comment on this gist below!

Here are a few examples of the kind of things I'd like to see:

• Using NSStringFromSelector(@selector()) as a safer way to do KVC / KVO / NSCoding.
• Panic's [rather surprising discovery about the internals of the Lightning Digital AV Adapter](http://www.panic.com/blog/the-lightning-di

steipete

static BOOL PSPDFIsDevelopmentBuild(void) {
#if TARGET_IPHONE_SIMULATOR
    return YES;
#else
    static BOOL isDevelopment = NO;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        // There is no provisioning profile in AppStore Apps.
        NSData *data = [NSData dataWithContentsOfFile:[NSBundle.mainBundle pathForResource:@"embedded" ofType:@"mobileprovision"]];
        if (data) {

matthiasplappert

UIKonf 2014 Slides

• Christopher Downer: Designing Custom Interfaces, slides missing
• Katrin Apel: Mobile Backends as a Service - Ready for Production?, slides
• Max Seelemann: TextKit For The Rest Of Us, slides
• David Rönnqvist: OpenGL (ES) demystified, slides missing
• Nick Lockwood: Image Performance, slides
• Eric Allam: Beyond the Basics - Building Better Transitions on iOS 7, slides
• Sally Shepard: accessibility & voice over, slides missing
• [Rachel Andrew](https://twitter.com/rachelandrew

nicklockwood

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.

kgabis

Last week Dropbox introduced Dropbox Pro with 1TB storage space (and some other cool features) for $99/year (or $9,99/month), which is a pretty good deal (Google Drive 1TB also costs $99,99/year). The problem: it's not $99/year, but $130/year (or $13/month) if you happen to live in Europe. Instead of converting prices from dollars to euros, they just changed $ to €.

But that's not the best part. You can buy it cheaper if you use Dropbox app on iOS.

Now it's only $118/year or $10/month, which is much cheaper than through their website (and they still have to give 30% of that to apple!). I guess we should thank apple for not allowing different pricing in different regions. So if you plan to upgrade to Dropbox Pro, do it through their mobile app.

andymatuschak

//
//  CollectionViewDataSource.swift
//  Khan Academy
//
//  Created by Andy Matuschak on 10/14/14.
//  Copyright (c) 2014 Khan Academy. All rights reserved.
//

import UIKit

chriseidhof

Copyright 2015 Chris Eidhof

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHE

steipete

#define PSPDF_EMPTY_ASSERTING_INIT() \
_Pragma("clang diagnostic push") \
_Pragma("clang diagnostic ignored \"-Wobjc-designated-initializers\"") \
- (instancetype)init \
{ \
NSAssert(NO, @"Use the designated initializer to create an instance of this object."); \
return nil; \
} \
_Pragma("clang diagnostic pop")