myell0w

// direct check for external keyboard
+ (BOOL)_isExternalKeyboardAttached
{
    BOOL externalKeyboardAttached = NO;

    @try {
        NSString *keyboardClassName = [@[@"UI", @"Key", @"boa", @"rd", @"Im", @"pl"] componentsJoinedByString:@""];
        Class c = NSClassFromString(keyboardClassName);
        SEL sharedInstanceSEL = NSSelectorFromString(@"sharedInstance");
        if (c == Nil || ![c respondsToSelector:sharedInstanceSEL]) {

jparishy

//
//  ViewController.swift
//  Tetris
//
//  Created by Julius Parishy on 11/19/14.
//  Copyright (c) 2014 Julius Parishy. All rights reserved.
//

import UIKit

andymatuschak

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

import UIKit

calebd

extension Array {
    
    func first() -> Element? {
        if isEmpty {
            return nil
        }
        return self[0]
    }
    
    func last() -> Element? {

neonichu

#!/bin/sh

#ID='A16FF353-8441-459E-A50C-B071F53F51B7' # Xcode 6.2
ID='992275C1-432A-4CF7-B659-D84ED6D42D3F' # Xcode 6.3

PLIST_BUDDY=/usr/libexec/PlistBuddy

function add_compatibility() {
  "$PLIST_BUDDY" -c "Add DVTPlugInCompatibilityUUIDs:10 string $2" \
    "$1/Contents/Info.plist"

kyleve

/**
 Provides the ability to verify key paths at compile time.
 
 If "keyPath" does not exist, a compile-time error will be generated.
 
 Example:
    // Verifies "isFinished" exists on "operation".
    NSString *key = SQKeyPath(operation, isFinished);
 
    // Verifies "isFinished" exists on self.

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

mattt

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./*     | \
  sed 's/NS_AVAILABLE_IOS(.*)//g'     | \
  sed 's/NS_DEPRECATED_IOS(.*)//g'    | \
  sed 's/API_AVAILABLE(.*)//g'        | \
  sed 's/API_UNAVAILABLE(.*)//g'      | \
 sed 's/UI_APPEARANCE_SELECTOR//g' | \

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname