Carl Jahn carlj

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

Objective-C Coding Convention and Best Practices

Most of these guidelines are to match Apple's documentation and community-accepted best practices. Some are derived some personal preference. This document aims to set a standard way of doing things so everyone can do things the same way. If there is something you are not particularly fond of, it is encouraged to do it anyway to be consistent with everyone else.

This document is mainly targeted toward iOS development, but definitely applies to Mac as well.

Operators

NSString *foo = @"bar";

	---
	language: objective-c
	before_script:
	- ./scripts/travis/add-key.sh
	after_script:
	- ./scripts/travis/remove-key.sh
	after_success:
	- ./scripts/travis/testflight.sh
	env:
	global:

	#import <Foundation/Foundation.h>

	typedef id(^BankAccount)(char *cmd);
	typedef id(^CurrentBalanceMethod)(void);
	typedef id(^DepositMethod)(double);
	typedef id(^WithdrawMethod)(double);

	BankAccount CreateBankAccount(double initialBalance)
	{
	// Initialization

	- (UIImage *)pspdf_preloadedImage {
	CGImageRef image = self.CGImage;

	// make a bitmap context of a suitable size to draw to, forcing decode
	size_t width = CGImageGetWidth(image);
	size_t height = CGImageGetHeight(image);

	CGColorSpaceRef colourSpace = CGColorSpaceCreateDeviceRGB();
	CGContextRef imageContext = CGBitmapContextCreate(NULL, width, height, 8, width*4, colourSpace,
	kCGImageAlphaPremultipliedFirst \| kCGBitmapByteOrder32Little);