Bo openaphid

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

Kilim https://github.com/kilim/kilim
Quasar http://docs.paralleluniverse.co/quasar/
Lois http://flipkart-incubator.github.io/Lois/

Objective-C APIs can now express the “nullability” of parameters, return types, properties, variables, etc. For example, here is the expression of nullability for several UITableView APIs:

-(void)registerNib:(nonnull UINib *)nib forCellReuseIdentifier:(nonnull NSString *)identifier;
-(nullable UITableViewCell *)cellForRowAtIndexPath:(nonnull NSIndexPath)indexPath;
@property (nonatomic, readwrite, retain, nullable) UIView *backgroundView;

The nullability qualifiers affect the optionality of the Objective-C APIs when in Swift. Instead of being imported as implicitly-unwrapped optionals (e.g., UINib!), nonnull-qualified types are imported as non-optional (e.g., UINib) and nullable-qualified types are imported as optional (e.g., UITableViewCell?), so the above APIs will be seen in Swift as:

func registerNib(nib: UINib, forCellReuseIdentifier identifier: String)

	require 'openssl'
	require 'base64'
	require 'json'
	require 'httpclient'

	http = HTTPClient.new(:agent_name => useragent)
	key = "" #The Private key
	login_info = {:guid => "00000000-0000-0000-0000-000000000000",
	:password => "PASSWORD",
	:username => "USERNAME",

	//
	// AppDelegate.m
	// AnimationExamplesiPhone
	//
	// Created by Eric Allam on 10/05/2014.

	#import "AppDelegate.h"

	#pragma mark - UIColor Additions

	import Foundation

	go(println("in a thread"))

	// buffered channel
	var c = Chan(buffer:20)

	// sending routing
	go {
	while(true) {

	import java.io.{ObjectInputStream, ObjectOutputStream}
	import org.apache.spark.broadcast.Broadcast
	import org.apache.spark.streaming.StreamingContext
	import scala.reflect.ClassTag

	// This wrapper lets us update brodcast variables within DStreams' foreachRDD
	// without running into serialization issues
	case class BroadcastWrapper[T: ClassTag](
	@transient private val ssc: StreamingContext,
	@transient private val _v: T

	//
	// MultiDirectionAdjudicatingScrollView.swift
	// Khan Academy
	//
	// Created by Andy Matuschak on 12/16/14.
	// Copyright (c) 2014 Khan Academy. All rights reserved.
	//

	import UIKit
	import UIKit.UIGestureRecognizerSubclass

	// your code

	apply from: "build-plugins/idea-gradle-sources.gradle"

	/// Observes a run loop to detect any stalling or blocking that occurs.
	///
	/// This class is thread-safe.
	@interface GHRunLoopWatchdog : NSObject

	/// Initializes the receiver to watch the specified run loop, using a default
	/// stalling threshold.
	- (id)initWithRunLoop:(CFRunLoopRef)runLoop;

	/// Initializes the receiver to detect when the specified run loop blocks for