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The Wisdom of Quinn

Informative DevForum posts from everyone's favorite DTS member.

(Arranged newest to oldest)

douglashill

import UIKit

/// A wrapper view controller that makes the horizontal size class
/// be based on both the Dynamic Text size and the width available.
class AdaptiveTraitsContainer: UIViewController {
    let wrappedViewController: UIViewController

    init(wrappedViewController: UIViewController) {
        self.wrappedViewController = wrappedViewController
        super.init(nibName: nil, bundle: nil)

mayoff

import Dispatch
import Foundation

var x = 7
let dd = withUnsafeBytes(of: &x, { DispatchData.init(bytes: $0) })
print(dd as? Data)                      // Case 1: nil
print(dd as? NSData)                    // Case 2: nil
print(dd as Any as? Data)               // Case 3: nil
print(dd as Any as? NSData)             // Case 4: .some
print(dd as Any as? NSData as Data?)    // Case 5: .some

mxcl

#!/bin/bash
#
# Faster toolchain build: skips as much as possible.
#
# To use this toolchain from the command line:"
#     export TOOLCHAINS=$(whoami)
#
# we build to the same prefix every time (instead of building
# to a versioned prefix) because every time the prefix changes
# *everything* rebuilds.

jspahrsummers

//
// DON'T do this, or else you risk a deadlock (e.g., by accidentally performing it in a different order somewhere)
//

dispatch_async(firstQueue, ^{
  dispatch_sync(secondQueue, ^{
    // code requiring both queues
  });
});

mattshepherd

//disable TOC button
window.HelpViewer.showTOCButton(false);

//enable TOC button
//If you call this on window load it will flash active for a brief second and then disable again.
//Call if after a delay of 250ms and is works fine
//Not sure what the second variable does yet, but passing false works fine
window.HelpViewer.showTOCButton( true, false, function() {
	 //do something to toggle TOC in your webpage
});

steipete

static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
    NSCParameterAssert(fileURL);

    NSData *shaData;

    int fd = open(fileURL.path.UTF8String, O_RDONLY);
    if (fd < 0) {
        if (error) *error = [NSError pspdf_errorWithCode:PSPDFErrorCodeUnableToOpenPDF description:@"Failed to open file for calculating SHA256."];
        return nil;
    }

steipete

static NSData *PSPDFCalculateSHA256FromFileURL(NSURL *fileURL, CC_LONG dataLength, NSError **error) {
    NSCParameterAssert(fileURL);

    dispatch_queue_t shaQueue = dispatch_queue_create("com.pspdfkit.sha256-queue", DISPATCH_QUEUE_SERIAL);
    __block dispatch_io_t readChannel;

    void (^processIntError)(int intError) = ^(int intError) {
        if (intError != 0) {
            PSPDFLogWarning(@"Stream error: %d", intError);
            if (error) *error = [NSError errorWithDomain:@"SHA256Error" code:100 userInfo:@{NSLocalizedDescriptionKey: @"failed to open file for calculating SHA256."}];

praeclarum

//
//  ArrayDiff.swift
//
//  Created by Frank A. Krueger on 6/30/15.
//  Copyright © 2015 Krueger Systems, Inc. All rights reserved.
//  License: MIT http://opensource.org/licenses/MIT
//

import Foundation

AlamofireSoftwareFoundation

Last week, a number of publications ran a story about 1,000's of apps allegedly being vulnerable due to an SSL bug in AFNetworking. These articles contain a number of inaccurate and misleading statements on this matter.

We are publishing this response to clarify and correct these statements.

Background Information

For those not familiar with AFNetworking, here are some relevant details about the library for this story:

• AFNetworking is an open source, third-party library that provides convenience functionality on top of Apple's built-in frameworks.
• One component of AFNetworking is AFSecurityPolicy, which handles authentication challenges according to a policy configured by the application. This includes the evaluation of X.509 certificates which servers send back when connecting over HTTPS.