mattstevens

(lldb) b NSLog
Breakpoint 2: 2 locations.
(lldb) breakpoint command add -s python -o "return (frame.GetThread().GetFrameAtIndex(1).GetModule().GetFileSpec().GetFilename() == 'UIKit')"

jspahrsummers

#import <Foundation/Foundation.h>

int main (int argc, const char **argv) {
  @autoreleasepool {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
      dispatch_sync(dispatch_get_main_queue(), ^{
        NSLog(@"is main thread? %i", (int)[NSThread isMainThread]);
      });
    });

jtbandes

/// Decodes a dynamically-generated Uniform Type Identifier for inspection purposes. (**NOT FOR PRODUCTION USE!**)
/// Many, many thanks to http://alastairs-place.net/blog/2012/06/06/utis-are-better-than-you-think-and-heres-why/
///
/// <https://developer.apple.com/library/ios/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_conc/understand_utis_conc.html#//apple_ref/doc/uid/TP40001319-CH202-BCGCDHIJ>
func decodeDynUTI(_ uti: String) -> String?
{
    let vec = Array("abcdefghkmnpqrstuvwxyz0123456789")

    let encoded = Array(uti).suffix(from: 5)
    var result: [UInt8] = []

steipete

# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

# (A similar approach works for older versions too, just change the version number after DeviceSupport)

michaelochs

NSDate *date = [NSDate new];

NSDateFormatter *dateFormatter = [NSDateFormatter new];
dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"nl_NL"];
dateFormatter.dateStyle = NSDateFormatterFullStyle;
dateFormatter.formattingContext = NSFormattingContextDynamic; // this is the important setting

NSString *dateString = [dateFormatter stringFromDate:date];

NSString *s1 = [NSString stringWithFormat:@"Foo %@", dateString]; // "Foo dinsdag 13 december 2016"

rtrouton

iOS 10.2 Simulator: https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_2-10.2.1.1484185528.dmg
iOS 10.1 Simulator: https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_1-10.1.1.1476902849.dmg
iOS 10.0 Simulator: https://devimages-cdn.apple.com/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK10_0-10.0.1.1474488730.dmg
iOS 9.3 Simulator: https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_3-9.3.1.1460411551.dmg
iOS 9.2 Simulator: https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_2-9.2.1.1451951473.dmg
iOS 9.1 Simulator: https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_1-9.1.1.1446593668.dmg
iOS 9.0 Simulator: https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/com.apple.pkg.iPhoneSimulatorSDK9_0-9.0.1.1443554484.dmg
iOS 8.4 Simulator: https://devimages.a

mikeash

#!/bin/bash

# Exit the script immediately on error
set -e

# We'll work in /tmp
cd /tmp

# Clone mach_override unless we already have it
if [ ! -d mach_override ]; then

nblumhardt

using System;
using System.Diagnostics;
using System.Linq;
using System.Runtime.CompilerServices;
using Serilog;
using Serilog.Configuration;
using Serilog.Core;
using Serilog.Events;

namespace ConsoleApp24

DerekSelander

#!/bin/bash

# MIT License
# 
# Copyright (c) 2018 Derek Selander (@LOLgrep)
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse