0xmachos

Keychain API

kSecAttrAccessible Mapping

Protection Domain (pdmn)	Keychain Accessibility Values
ck	kSecAttrAccessibleAfterFirstUnlock
cku	kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly
dk	kSecAttrAccessibleAlways
akpu	kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly

lattner

Async/Await for Swift

• Proposal: SE-XXXX
• Authors: Chris Lattner, Joe Groff

Introduction

Modern Cocoa development involves a lot of asynchronous programming using closures and completion handlers, but these APIs are hard to use. This gets particularly problematic when many asynchronous operations are used, error handling is required, or control flow between asynchronous calls gets complicated. This proposal describes a language extension to make this a lot more natural and less error prone.

This paper introduces a first class Coroutine model to Swift. Functions can opt into to being async, allowing the programmer to compose complex logic involving asynchronous operations, leaving the compiler in charge of producing the necessary closures and state machines to implement that logic.

mattt

@import MobileCoreServices;

static CFStringRef UTTypeForImageData(NSData *data) {
    const unsigned char * bytes = [data bytes];

    if (data.length >= 8) {
        if (bytes[0] == 0x89 && bytes[1] == 0x50 && bytes[2] == 0x4E && bytes[3] == 0x47 && bytes[4] == 0x0D && bytes[5] == 0x0A && bytes[6] == 0x1A && bytes[7] == 0x0A) {
            return kUTTypePNG;
        }
    }

matthiasplappert

@interface UIView (MPAdditions)
@end

@implementation UIView (MPAdditions)

- (id)debugQuickLookObject {
    if (self.bounds.size.width < 0.0f || self.bounds.size.height < 0.0f) {
        return nil;
    }
    

mattt

NS_INLINE NSRange NSRangeMake(NSUInteger loc, NSUInteger len) {
    return NSMakeRange(loc, len);
}

NS_INLINE NSUInteger NSRangeMax(NSRange range) {
    return NSMaxRange(range);
}

NS_INLINE BOOL NSRangeContainsLocation(NSUInteger loc, NSRange range) {
    return NSLocationInRange(loc, range);

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' | \

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

MaximKeegan

#!/bin/sh
# Create a RAM disk with same perms as mountpoint
# Script based on http://itux.idev.pro/2012/04/iservice-speed-up-your-xcode-%D0%BD%D0%B5%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D1%8B%D0%B5-%D1%81%D0%BF%D0%BE%D1%81%D0%BE%D0%B1%D1%8B/ with some additions
# Usage: sudo ./xcode_ramdisk.sh start

USERNAME=$(logname)

TMP_DIR="/private/tmp"
RUN_DIR="/var/run"
SYS_CACHES_DIR="/Library/Caches"